Category Archives: Product Catalog

China best Motor Worm Gear Drive Cap Screws for Valves Cast Iron Butterfly Valve near me supplier

Product Description

 ZheJiang OTS Valve Manufacturing Co., Ltd.

Established during the period of China’s reform specializes in all kinds of industrial butterfly valves with 13340 square meters including 8600 square meters work-shop. Fixed assets of RMB20 million as well as some advanced processing equipments, among all 120 staffs (including 15 technicians). We can provide strong ability of design, processing, assembling and testing for all Butterfly Valves.

Further, we are rich in the experience of producing butterfly valves over 10 years, all of the butterfly valves we produced keep up to the advanced standard home and aboard. With perfect manufacturing innovation, we export all specifications of Butterfly Valve, Gate Valve, Check Valve and Filters, which size from DN40~DN2400, with different materials for Body, Disc, Stem, Pin,

To innovate more perfect products, we insist on the aim: High Quality, carrying on the ISO9001 Quality Standard and in line with EU Standard shown in CE certificate. All the staffs in the company are aware of the Importance of Quality and Safety, and any error occurring in design, producing and purchasing of materials, quality inspection must be controlled in our factory.

All our butterfly valves have got high quality reputation from all customers in the world. We have sold different types of valves to 29 provinces and regions in China, suitable to water works, electric power plant, metallurgy, petrifaction, irrigation and drainage, etc. And we also set-up long-time friendly business relationships with some customers from Asia, Europe and American.

On the basis of mutual benefits, friendly cooperation, fairly business, we offer perfect quality, sincerely service and reasonable prices to meet all the customers’ requirement in the International market.
 

1. Product Feature:
    The opening and closing part of butterfly valve use a disc in the body around its own axis rotation, so as to achieve the purpose of opening and closing or adjustment. Butterfly valve can be used to control the flow of air, water, steam, a variety of corrosive media, mud, oil, liquid metal and radioactive media and other types of fluid.It is mainly used to cut off and throttle the flow in the pipeline.

2. Material :

 

NO Part name Material NO Part name Material
1 Body GGG40 4 Seat EPDM/NBR/VITON
2 Disc CF8/C954/CF8M/DI 5 Bushing PTFE
3 Shaft SF-1 6 SEAL ring NBR/EPDM

 

3. Technical Parameters:

 

                            Medium/working condition

 

      Main Parts

Can be used in water supply and drainage, central air conditioning, heating, sewage, chemical industry, paper making, Marine, food industry, etc

Body

Ductile iron/WCB/SS.,etc.

Disc

SS/DSS/Copper Alloy

Seat

NBR

EPDM

VITON

Suitable temperature

-20ºC~80ºC

-20ºC~100ºC

-10ºC~180ºC

4. Products Photos: 


 

5. OTS Quality Inspection: 

6. Our Valves in Site: 7. Packing and Delivery: 

8. Certificates: 

9. FAQ

1. Can I get free samples?
A: Yes, we can provide you the free samples, but you need to bear their own delivery costs.

2. Can I request to change the form of packaging and transportation?
A: Yes, We can change the form of the packaging and transportation according to your request, but you have to bear their own costs incurred during this period and the spreads.

3. Can I request to advance the shipment?
A: It should be depends on whether there is sufficient inventory in our warehouse.

4. Can I have my own Logo on the product?
A: Yes, you can send us your drawing and we can make your logo, but you have to bear their own the cost.

5. Can you produce the products according to my own drawings?
A: Yes, we can produce the products according to your drawings that will be most satisfy you.

 

6. What’s your terms of payment?
A: T/T, L/C , Alibaba Trade Assurance available, full protection for your orders.

 

7.Do you accept custom design on size?
A: Yes, if the size is reasonable

 

8.Transportation
Transported by DHL, UPS, EMS, Fedex, SF, by Air, by Sea.

 

What Are Screw Shaft Threads?

A screw shaft is a threaded part used to fasten other components. The threads on a screw shaft are often described by their Coefficient of Friction, which describes how much friction is present between the mating surfaces. This article discusses these characteristics as well as the Material and Helix angle. You’ll have a better understanding of your screw shaft’s threads after reading this article. Here are some examples. Once you understand these details, you’ll be able to select the best screw nut for your needs.
screwshaft

Coefficient of friction between the mating surfaces of a nut and a screw shaft

There are 2 types of friction coefficients. Dynamic friction and static friction. The latter refers to the amount of friction a nut has to resist an opposing motion. In addition to the material strength, a higher coefficient of friction can cause stick-slip. This can lead to intermittent running behavior and loud squeaking. Stick-slip may lead to a malfunctioning plain bearing. Rough shafts can be used to improve this condition.
The 2 types of friction coefficients are related to the applied force. When applying force, the applied force must equal the nut’s pitch diameter. When the screw shaft is tightened, the force may be removed. In the case of a loosening clamp, the applied force is smaller than the bolt’s pitch diameter. Therefore, the higher the property class of the bolt, the lower the coefficient of friction.
In most cases, the screwface coefficient of friction is lower than the nut face. This is because of zinc plating on the joint surface. Moreover, power screws are commonly used in the aerospace industry. Whether or not they are power screws, they are typically made of carbon steel, alloy steel, or stainless steel. They are often used in conjunction with bronze or plastic nuts, which are preferred in higher-duty applications. These screws often require no holding brakes and are extremely easy to use in many applications.
The coefficient of friction between the mating surfaces of t-screws is highly dependent on the material of the screw and the nut. For example, screws with internal lubricated plastic nuts use bearing-grade bronze nuts. These nuts are usually used on carbon steel screws, but can be used with stainless steel screws. In addition to this, they are easy to clean.

Helix angle

In most applications, the helix angle of a screw shaft is an important factor for torque calculation. There are 2 types of helix angle: right and left hand. The right hand screw is usually smaller than the left hand one. The left hand screw is larger than the right hand screw. However, there are some exceptions to the rule. A left hand screw may have a greater helix angle than a right hand screw.
A screw’s helix angle is the angle formed by the helix and the axial line. Although the helix angle is not usually changed, it can have a significant effect on the processing of the screw and the amount of material conveyed. These changes are more common in 2 stage and special mixing screws, and metering screws. These measurements are crucial for determining the helix angle. In most cases, the lead angle is the correct angle when the screw shaft has the right helix angle.
High helix screws have large leads, sometimes up to 6 times the screw diameter. These screws reduce the screw diameter, mass, and inertia, allowing for higher speed and precision. High helix screws are also low-rotation, so they minimize vibrations and audible noises. But the right helix angle is important in any application. You must carefully choose the right type of screw for the job at hand.
If you choose a screw gear that has a helix angle other than parallel, you should select a thrust bearing with a correspondingly large center distance. In the case of a screw gear, a 45-degree helix angle is most common. A helix angle greater than zero degrees is also acceptable. Mixing up helix angles is beneficial because it allows for a variety of center distances and unique applications.
screwshaft

Thread angle

The thread angle of a screw shaft is measured from the base of the head of the screw to the top of the screw’s thread. In America, the standard screw thread angle is 60 degrees. The standard thread angle was not widely adopted until the early twentieth century. A committee was established by the Franklin Institute in 1864 to study screw threads. The committee recommended the Sellers thread, which was modified into the United States Standard Thread. The standardized thread was adopted by the United States Navy in 1868 and was recommended for construction by the Master Car Builders’ Association in 1871.
Generally speaking, the major diameter of a screw’s threads is the outside diameter. The major diameter of a nut is not directly measured, but can be determined with go/no-go gauges. It is necessary to understand the major and minor diameters in relation to each other in order to determine a screw’s thread angle. Once this is known, the next step is to determine how much of a pitch is necessary to ensure a screw’s proper function.
Helix angle and thread angle are 2 different types of angles that affect screw efficiency. For a lead screw, the helix angle is the angle between the helix of the thread and the line perpendicular to the axis of rotation. A lead screw has a greater helix angle than a helical one, but has higher frictional losses. A high-quality lead screw requires a higher torque to rotate. Thread angle and lead angle are complementary angles, but each screw has its own specific advantages.
Screw pitch and TPI have little to do with tolerances, craftsmanship, quality, or cost, but rather the size of a screw’s thread relative to its diameter. Compared to a standard screw, the fine and coarse threads are easier to tighten. The coarser thread is deeper, which results in lower torques. If a screw fails because of torsional shear, it is likely to be a result of a small minor diameter.

Material

Screws have a variety of different sizes, shapes, and materials. They are typically machined on CNC machines and lathes. Each type is used for different purposes. The size and material of a screw shaft are influenced by how it will be used. The following sections give an overview of the main types of screw shafts. Each 1 is designed to perform a specific function. If you have questions about a specific type, contact your local machine shop.
Lead screws are cheaper than ball screws and are used in light-duty, intermittent applications. Lead screws, however, have poor efficiency and are not recommended for continuous power transmission. But, they are effective in vertical applications and are more compact. Lead screws are typically used as a kinematic pair with a ball screw. Some types of lead screws also have self-locking properties. Because they have a low coefficient of friction, they have a compact design and very few parts.
Screws are made of a variety of metals and alloys. Steel is an economical and durable material, but there are also alloy steel and stainless steel types. Bronze nuts are the most common and are often used in higher-duty applications. Plastic nuts provide low-friction, which helps reduce the drive torques. Stainless steel screws are also used in high-performance applications, and may be made of titanium. The materials used to create screw shafts vary, but they all have their specific functions.
Screws are used in a wide range of applications, from industrial and consumer products to transportation equipment. They are used in many different industries, and the materials they’re made of can determine their life. The life of a screw depends on the load that it bears, the design of its internal structure, lubrication, and machining processes. When choosing screw assemblies, look for a screw made from the highest quality steels possible. Usually, the materials are very clean, so they’re a great choice for a screw. However, the presence of imperfections may cause a normal fatigue failure.
screwshaft

Self-locking features

Screws are known to be self-locking by nature. The mechanism for this feature is based on several factors, such as the pitch angle of the threads, material pairing, lubrication, and heating. This feature is only possible if the shaft is subjected to conditions that are not likely to cause the threads to loosen on their own. The self-locking ability of a screw depends on several factors, including the pitch angle of the thread flank and the coefficient of sliding friction between the 2 materials.
One of the most common uses of screws is in a screw top container lid, corkscrew, threaded pipe joint, vise, C-clamp, and screw jack. Other applications of screw shafts include transferring power, but these are often intermittent and low-power operations. Screws are also used to move material in Archimedes’ screw, auger earth drill, screw conveyor, and micrometer.
A common self-locking feature for a screw is the presence of a lead screw. A screw with a low PV value is safe to operate, but a screw with high PV will need a lower rotation speed. Another example is a self-locking screw that does not require lubrication. The PV value is also dependent on the material of the screw’s construction, as well as its lubrication conditions. Finally, a screw’s end fixity – the way the screw is supported – affects the performance and efficiency of a screw.
Lead screws are less expensive and easier to manufacture. They are a good choice for light-weight and intermittent applications. These screws also have self-locking capabilities. They can be self-tightened and require less torque for driving than other types. The advantage of lead screws is their small size and minimal number of parts. They are highly efficient in vertical and intermittent applications. They are not as accurate as lead screws and often have backlash, which is caused by insufficient threads.

China best Motor Worm Gear Drive Cap Screws for Valves Cast Iron Butterfly Valve near me supplier China best Motor Worm Gear Drive Cap Screws for Valves Cast Iron Butterfly Valve near me supplier

China supplier Custom Made Fishing Reel Worm Gear Shaft From China near me shop

Product Description

Product Description:
Finish Reel Worm Screw Shaft:
(1).Material: Aluminum/Stainless steel
(2).Surface Finished: Anodize &Sandblasting/ Polish
(3).Process: CNC Milling and Turning
(4).Tolerance: ±0.02mm

Parts Information

Product Name  Custom Made Fishing Reel Worm Gear Shaft from China
Applicable Material Alunimum/stainless steel/titanium/brass/copper/POM/Telfon/PEEK  etc.
Surface finish Machine finish/anodized/ beadblasting/Plating/Polish/brush/heat treatment/Brushed/Zinc plating/Nickel Plating/PVD etc
Payment Terms 50% deposit before production and 50% balance before arranging to ship
High Tolerance ± 0.02mm or accoriding to your requirment
Quality control Checking is during production process, after surface and before packing
Lead time  10-15 days for sample,15-25 days for bulk order depends on your design
Package Standard package/ Pallet or container/ as per customized specifications
Shipment Express & air freight is preferred / sea freight/ as per customized specifications

Our Business: 

1.CNC Turning Part 2.CNC Milling Parts
3.Camera head ball/Filter Ring/Stripod 4.Metal Pen body
5.Aluminum Extrusion Mold 6.Punch/Stamping/Welding/Forging/Bending
7.Medical Aluminum parts 8. Injection molding
9.Decorate Car part 10. Aluminum housing
11.Stainless steel/Aluminum shaft 12.LED Aluminum parts
13. Hard/Normal anodizing 14.Laser engraving

  
Company Information:
LCH was found in 2003, with a total investment of $1.5 million, over 4,500 square meters, equipped with the most advanced high precision 5Axis Precision Automatic Lather machine (8 sets), CNC Milling machine (23sets), CNC Turning machine (26sets),CNC machining center, automatic lathe and various kinds of secondary processing equipment more than 80 sets.

1. Work Shop:

2. Products We made:

                             We can custom the parts for you according to your drawing or samples

3. Quality Control

4. Package

5. Clients and comments

What can we do for you?
1. Professional, Competitive price and Fast delivery time
We engaged in this area for almost 11yeas, experience engineer can help you process the project well and perfect, also we own our factory that we can control the cost and delivery time very well. We can try best to meet your request.
2. Protect our customer profit well
Even we have very strictly quality control system, but we still can`t promise every part you received will 100% perfect, so if there is any defective parts you received, you just need to offer us the evidence(such as picture),we will check and confirm it. After that, we will repair or redo them.
Because of our strictly quality control system, we have confidence to promise our customer with this. Please kindly noted that it`s our advantage compared with others, we realize that only the high quality and good service can we keep friendly and long-term business relationship with our customer and it`s also the only way for an enterprise to be existed…
  
FAQ:

1.    Can you sent the product drawing to me? 
Pictures on website was just for reference, More correct information and some special requirements, 
Please kindly contact us.
2. Can you make OEM order?
Yes, OEM/ODM orders are welcome. You are warmly welcome to send the your designs to us, We will offer you reasonable prices with high quality
Please provide us the drawings or please tell us the detailed information what you need, we can copy the parts according to your information.
3. What kind of files do you accept?
PDF, DXF, ISG, STEP, X-T, High Resolution IPJ.
4. How long can I expect to get the sample? 
Samples will be ready for delivery in 5-15 days after we confirmed the shop drawings, The samples will be sent to you via express and arrive in 3-5 days.
 5. What about the lead time for mass production? 
Honestly, normally it is 15-30 days, and it depends on the order quantity and the season you place the order.  Generally speaking, (if you project is urgent, we can help you short it), we suggest that you start inquiry 1 months before the date you would like to get the products at your country. 
6. What are your terms of delivery? 
We accept EXW, FOB, CNF, etc. You can choose the most convenient one. Regarding to the shipping cost, if you have your own express account that will be welcome.

 
 

Screw Shaft Types

If you’re looking for a screw shaft, but aren’t sure which type to buy, you’re in luck. In this article, we’ll talk about the different types, including Threaded shank, Round head, and Machined. Once you’ve read it, you’ll know which type to buy. Then, you can decide whether you want a ball screw nut or a threaded shank.

Machined screw shafts

Besides the standard stainless steel shaft, manufacturers also provide a variety of other materials, such as titanium, bronze, and brass. In addition to stainless steel, manufacturers also provide a variety of top-coating options, including zinc, brass, and chromium. Aluminum screws are not particularly durable and are easily affected by weather. Most screw shafts feature self-locking mechanisms. They are especially useful in C-clamps, vises, and screw-top container lids.
For applications where accuracy is vital, a ball screw shaft needs to be annealed. A heat treatment can be performed on the ball screw shaft to ensure that both ends are heated evenly. In this process, the shaft will be more durable, while maintaining its high-precision properties. These screw shafts are a key component in computer-controlled motion-control systems, wire bonding, and other industries that require high-precision and high-quality performance.
Depending on the material used, screw shafts can be made of stainless steel or titanium. High-precision CNC machines and lathes are typically used to manufacture screw shafts. Various shapes and sizes are available, each with a specific application. Whether you need a small or large screw, you can find 1 to fit your needs. And since each size requires a different material, your choice of material is important as well.
In general, the materials used for machining screw shafts are steel, stainless steel, titanium, brass, bronze, and aluminum. Metals that resist corrosion are also commonly used. Other materials for screw shafts are Teflon, nylon, and nylon. You can also find threaded screw shafts in materials such as porcelain, glass, and ceramic. If you want to use your screws in a unique material, consider purchasing a customized one.
screwshaft

Ball screw nuts

If you have a screw shaft, the last thing you want to worry about is the ball nut slipping off. To prevent this, you can place a temporary stop in the shaft’s grooves to ensure that the ball nut does not slide off. When you remove the stop, you can then install the ball screw nut. But, before you can install the ball screw nut, you have to make sure that you have a good grip on the shaft.
When selecting ball screw nuts, it’s important to consider how much preload you need to apply to avoid excessive backlash. Preloading eliminates this problem by making the ball nut compact. It also prevents backlash, which is lost motion caused by clearance between the ball and nut. Backlash disrupts repeatability and accuracy. This is where spacer preloading comes in. You can insert a spacer between the 2 ball nuts to transmit the force to the nut. However, you should keep in mind that this method reduces the load capacity of the ball screw.
The critical speed of a screw is the maximum rotating speed before it whips. This critical speed is influenced by several factors, including the diameter of the screw shaft, the number of support elements, and the material. By adjusting these factors, you can reduce the number of components used and the amount of time it takes to assemble the screw shaft. In addition, you can also reduce the number of components and avoid stacking tolerances. However, the critical speed of plastic nuts is limited due to sliding friction.
The ball screw nut has several characteristics that make it unique. Its most prominent feature is the presence of ball bearings. These balls help reduce friction between the screw nut and the shaft. Without ball bearings, the friction would be too high to function properly. Another important characteristic is the groove profile of the nut and ball. These 2 features ensure that the ball and the nut meet at 2 points. You’ll be amazed by the results of the work of these ball screw nuts.
screwshaft

Threaded shank

Wood screws are usually not fully threaded because the shank has an unthreaded portion at the top. This shoulder part forces the screw to compress 2 pieces of wood, which prevents the screw from overheating and compromising the materials strength. As the screw is threaded partially up, it is not as difficult to remove as a fully threaded screw. However, it is important to note that a wood screw will not hold as tightly as 1 with a fully threaded shank.
In addition to being universal, screw threads can be of different sizes. For example, a M8 screw has a thread pitch of 1.25 mm. To avoid confusion, screw thread pitches are commonly given with a multiplication sign. For example, M8x1 means that the screw is 8 mm in diameter but has a thread pitch of 1 mm per 360-degree rotation. Those who are not familiar with these dimensions may find it confusing.
The OD of the threaded portion of a bolt is generally smaller than the OD of the nut. If the shank is too deep for the nut to fit, the threads may bottom out. This is why it’s important to use a thread-cutting bit with a small thread diameter. You can use a micrometer or caliper to measure the thread diameter. This tool will also allow you to easily identify which screw size fits where and how well.
The metric system is the most widely used. Fasteners with DIN numbers are generally metric in size. This makes them very useful for industrial settings. You can find metric-sized screws anywhere, as long as you buy them from a reputable manufacturer. These fasteners also come with a dog point, which is used for safety wire. If the screw needs to be replaced, the shank can be drilled with a hole for a safety wire or for a dog-point.

Round head

A round head screw is the most common type used for machine screws. Other common types include truss head, flat head, and hexed head. Each has a different profile and are used for different purposes. A round head screw is typically wider than a flat or a hexed head, and has a slightly rounded surface. These screws are useful for projects involving sheet metal or sheet-metal parts. Round heads are usually slightly wider than a hex head screw, and they may also be used as a substitute for washers in certain applications. However, truss heads are not necessary for every project.
A wood screw has a smooth shank that protrudes above the surface of the material it is attaching. A metal screw has a threaded shaft that is fully threaded from head to point, and a fully threaded shaft provides more bite. Two common head styles are round head and pan head. If the task requires the screw to be flush or countersunk, the round head will be the best choice.
Another type is the Reed & Prince screw drive. These are similar to Phillips screws but have a 75-degree V shape. They are commonly used in marine hardware and are also known as BNAE NFL22-070. This type is also used for steel plate hangers. In addition to round head and pan head screws, there are a variety of other screw types. You can even get a head with a slotted head if you know where to look.
Screw diameters are specified according to the ISO 261 or ISO 262 standards. An M8 screw has a diameter of 8.25 mm. The M8 screw has a pitch of 1.25 mm, which is equivalent to 1 mm per 360 degrees. There are several other standard screw sizes and thread diameters available. You can find them all by consulting the relevant standards. But remember, the metric system is the most popular.
screwshaft

Self-locking mechanism

A self-locking mechanism for a screw shaft is a device that secures the screw to its supporting member in a failure position. The locking mechanism provides a positive connection between the screw shaft and the control surface during normal operation, and locks the screw to its supporting member when the screw fails. Previous attempts to solve this problem have typically used secondary nuts with free play on the screw, which were intentionally designed to jam when loaded. However, such a device can be unreliable, which is why the present invention offers a more robust and reliable locking mechanism.
The self-locking function of a screw depends on several factors, including its pitch angle and the coefficient of friction of the threads. The angle of friction must be less than the tangent of the material pairing to prevent untightening of the screw. Screws with self-locking mechanisms have an efficiency e lower than 50%, which is less than half. Self-locking screws also have the benefit of being less efficient than a standard screw.
Unlike a normal screw, a self-locking screw can be turned in either direction. The nut 22 rotates with the screw shaft, and the member 23 is translated in an axial direction. Regardless of the direction of the rotation of the screw, this axial translation will result in the opposite moment to that input moment. While screw self-locking mechanisms are typically less expensive, they are more reliable and durable.
Another important feature of self-locking screws is that they are not susceptible to independent loosening. The screw cannot rotate without a certain amount of torque. In addition, a self-locking screw shaft must have a small wedge with a smaller half-angle than the arctangent of the static friction. This means that the torque applied by the driver must be greater than the torque needed to overcome the friction.

China supplier Custom Made Fishing Reel Worm Gear Shaft From China near me shop China supplier Custom Made Fishing Reel Worm Gear Shaft From China near me shop

China OEM Worm and Gear Building Hoist Reducer for Sc200/200 Passenger Hoist wholesaler

Product Description

Worm and Gear Building Hoist Reducer for SC200/200 Passenger Hoist

Product Description

A.The features of Casing Safe Driving Motor Hoist Lifts Gearboxes 11KW 15KW Passenger Hoist Reducer

  1. The reducers have the following features because of using plane enveloping worm gear as compared with other kinds of worm transmissions: larger loading capactiy and compact dimension and higher efficiency and smoother and quieter functioning longer service life.
  2. In addition, the housings of these series reducers are made of high-strenghth aluminium alloy. So the reducers make the features of higher strength and lighter weight.
  3.  It is recommended to utilize the viscosity VG320 synthetic worm gear oil (or synthetic gear oil) for lubrication. Once the environment temperature is higher than 30°C, it is recommended to utilize the viscosity VG460 synthetic worm gear oil (or synthetic gear oil) for lubrication. And allowed maximum working oil temperature is 100°C.

 Number    Weight    Transmission   Ratio

Center Distance

(mm)

Output power

(KW)

 Ordering instruction
1 50KG 1:16 125 11.6

Please specify

transmissionratio and type  

 when ordering
2 1:18 125 10.3
3 1:14 125 11.72
           

B.Installation

  1. The base-plate must be plane and stoutness and the base-plate must be screwed down and shock proof. 
  2. The connecting shaft of prime mover, reducer and operation device must be coaxial installation. 
  3. The diameter tolerance zone of input and output shaft is H6, the holes of fittings( such as couplings, belt-pully, sprocket wheel and so on) must properly mate the shaft, which prevents bearing from breakage because of over-loose mate. 
  4. Drivers such as sprocker wheel and gear must be fitted close to bearings in order to reduce bending stress of hanging shaft. 
  5. While assembling motor of WPD reducer, it is necessary that proper amount of butter applies to the warm shaft input hole and keyway, avoiding assembling too tightly and rusting after using for a long time. 
  6. When ordering or using all kinds of WPD type, if the motor weight is bigger than the common,supporting set is required.

Speed ratio

(I)

Center Distance

(mm)

Input Speed

(r/min)

Input Power

(Kw)

Rated output Torque

(N.M)

TransmissionEfficiency

(%)
14 125 1500 11.2 1128 89
1000 9.919 1276 87.4
16 125 1500 11.06 1136 88
1000 9.651 1417 87.5
20 144 1500 13 1942 86.5
1000 11.52 2512 85.4
25 125 1000 11.4 2650 83
1500 13 2166 84

C.Usage

  1. Before using,please check carefully whether the reducer modle, distance, ratio, input connecting method , output shaft structure, input and output shaft direction and revolving direction accord with required. 
  2.  According to the requirement of selecting lubricant oil in the product manual. Please fill proper category and brand lubricant.And then screw on the vent-plug, unlock the small cone-plug of vent-plug.Only after doing these, reducer is already for startinh up running.The proper brand and adequate lubricant oil is required, replacing oil in time conforming to the request of product manual is also necessary, especially after using first 100hours, it is required refilling new oil. 
  3. When abnormal circumstances occur, please stop and check reducer per solutions and reasons for faults of reducer(allowable highest oil temperature is 95, under this temperature limit, if oil temperature no more goes up, please let reducer continue running). 

 

Certifications

Company Profile

FAQ

Q1: Are you a trading company or a factory?

A1: We are  factory. 

Q2: How about the installation?

A2: Engineer could be sent to your site for installing and inspection.

Q3: How long is your delivery time?

A3: Generally 20 days after advance payment. 

 

Q4: How to place the order ?

A4:  pls provide the rack technical data , we can quote the price to you 

Screw Sizes and Their Uses

Screws have different sizes and features. This article will discuss screw sizes and their uses. There are 2 main types: right-handed and left-handed screw shafts. Each screw features a point that drills into the object. Flat tipped screws, on the other hand, need a pre-drilled hole. These screw sizes are determined by the major and minor diameters. To determine which size of screw you need, measure the diameter of the hole and the screw bolt’s thread depth.

The major diameter of a screw shaft

The major diameter of a screw shaft is the distance from the outer edge of the thread on 1 side to the tip of the other. The minor diameter is the inner smooth part of the screw shaft. The major diameter of a screw is typically between 2 and 16 inches. A screw with a pointy tip has a smaller major diameter than 1 without. In addition, a screw with a larger major diameter will have a wider head and drive.
The thread of a screw is usually characterized by its pitch and angle of engagement. The pitch is the angle formed by the helix of a thread, while the crest forms the surface of the thread corresponding to the major diameter of the screw. The pitch angle is the angle between the gear axis and the pitch surface. Screws without self-locking threads have multiple starts, or helical threads.
The pitch is a crucial component of a screw’s threading system. Pitch is the distance from a given thread point to the corresponding point of the next thread on the same shaft. The pitch line is 1 element of pitch diameter. The pitch line, or lead, is a crucial dimension for the thread of a screw, as it controls the amount of thread that will advance during a single turn.
screwshaft

The pitch diameter of a screw shaft

When choosing the appropriate screw, it is important to know its pitch diameter and pitch line. The pitch line designates the distance between adjacent thread sides. The pitch diameter is also known as the mean area of the screw shaft. Both of these dimensions are important when choosing the correct screw. A screw with a pitch of 1/8 will have a mechanical advantage of 6.3. For more information, consult an application engineer at Roton.
The pitch diameter of a screw shaft is measured as the distance between the crest and the root of the thread. Threads that are too long or too short will not fit together in an assembly. To measure pitch, use a measuring tool with a metric scale. If the pitch is too small, it will cause the screw to loosen or get stuck. Increasing the pitch will prevent this problem. As a result, screw diameter is critical.
The pitch diameter of a screw shaft is measured from the crest of 1 thread to the corresponding point on the next thread. Measurement is made from 1 thread to another, which is then measured using the pitch. Alternatively, the pitch diameter can be approximated by averaging the major and minor diameters. In most cases, the pitch diameter of a screw shaft is equal to the difference between the two.

The thread depth of a screw shaft

Often referred to as the major diameter, the thread depth is the outermost diameter of the screw. To measure the thread depth of a screw, use a steel rule, micrometer, or caliper. In general, the first number in the thread designation indicates the major diameter of the thread. If a section of the screw is worn, the thread depth will be smaller, and vice versa. Therefore, it is good practice to measure the section of the screw that receives the least amount of use.
In screw manufacturing, the thread depth is measured from the crest of the screw to the root. The pitch diameter is halfway between the major and minor diameters. The lead diameter represents the amount of linear distance traveled in 1 revolution. As the lead increases, the load capacity decreases. This measurement is primarily used in the construction of screws. However, it should not be used for precision machines. The thread depth of a screw shaft is essential for achieving accurate screw installation.
To measure the thread depth of a screw shaft, the manufacturer must first determine how much material the thread is exposed to. If the thread is exposed to side loads, it can cause the nut to wedge. Because the nut will be side loaded, its thread flanks will contact the nut. The less clearance between the nut and the screw, the lower the clearance between the nut and the screw. However, if the thread is centralized, there is no risk of the nut wedgeing.
screwshaft

The lead of a screw shaft

Pitch and lead are 2 measurements of a screw’s linear distance per turn. They’re often used interchangeably, but their definitions are not the same. The difference between them lies in the axial distance between adjacent threads. For single-start screws, the pitch is equal to the lead, while the lead of a multi-start screw is greater than the pitch. This difference is often referred to as backlash.
There are 2 ways to calculate the pitch and lead of a screw. For single-start screws, the lead and pitch are equal. Multiple-start screws, on the other hand, have multiple starts. The pitch of a multiple-start screw is the same as its lead, but with 2 or more threads running the length of the screw shaft. A square-thread screw is a better choice in applications requiring high load-bearing capacity and minimal friction losses.
The PV curve defines the safe operating limits of lead screw assemblies. It describes the inverse relationship between contact surface pressure and sliding velocity. As the load increases, the lead screw assembly must slow down in order to prevent irreversible damage from frictional heat. Furthermore, a lead screw assembly with a polymer nut must reduce rpm as the load increases. The more speed, the lower the load capacity. But, the PV factor must be below the maximum allowed value of the material used to make the screw shaft.

The thread angle of a screw shaft

The angle between the axes of a thread and the helix of a thread is called the thread angle. A unified thread has a 60-degree angle in all directions. Screws can have either a tapped hole or a captive screw. The screw pitch is measured in millimeters (mm) and is usually equal to the screw major diameter. In most cases, the thread angle will be equal to 60-degrees.
Screws with different angles have various degrees of thread. Originally, this was a problem because of the inconsistency in the threading. However, Sellers’s thread was easier to manufacture and was soon adopted as a standard throughout the United States. The United States government began to adopt this thread standard in the mid-1800s, and several influential corporations in the railroad industry endorsed it. The resulting standard is called the United States Standard thread, and it became part of the ASA’s Vol. 1 publication.
There are 2 types of screw threads: coarse and fine. The latter is easier to tighten and achieves tension at lower torques. On the other hand, the coarse thread is deeper than the fine one, making it easier to apply torque to the screw. The thread angle of a screw shaft will vary from bolt to bolt, but they will both fit in the same screw. This makes it easier to select the correct screw.
screwshaft

The tapped hole (or nut) into which the screw fits

A screw can be re-threaded without having to replace it altogether. The process is different than that of a standard bolt, because it requires threading and tapping. The size of a screw is typically specified by its major and minor diameters, which is the inside distance between threads. The thread pitch, which is the distance between each thread, is also specified. Thread pitch is often expressed in threads per inch.
Screws and bolts have different thread pitches. A coarse thread has fewer threads per inch and a longer distance between threads. It is therefore larger in diameter and longer than the material it is screwed into. A coarse thread is often designated with an “A” or “B” letter. The latter is generally used in smaller-scale metalworking applications. The class of threading is called a “threaded hole” and is designated by a letter.
A tapped hole is often a complication. There is a wide range of variations between the sizes of threaded holes and nut threads, so the tapped hole is a critical dimension in many applications. However, even if you choose a threaded screw that meets the requisite tolerance, there may be a mismatch in the thread pitch. This can prevent the screw from freely rotating.

China OEM Worm and Gear Building Hoist Reducer for Sc200/200 Passenger Hoist wholesaler China OEM Worm and Gear Building Hoist Reducer for Sc200/200 Passenger Hoist wholesaler

China Professional OEM Manufacturer Customized Sanitary Stainless Steel Meat Grinder Screw/ Worm Screw/Blades with Great quality

Product Description

ABOUT US
HangZhou Suijin machinery Technology Co,.Ltd is a profational manufacturer in HangZhou city, our main process is investment casting/precision casting and machining, for casting process, we have 2 kinds of production line, 1 is precision casting, another is water glass with competitive cost.

Apart from the investment casting workshop and machine workshop, we also provide the sand casting parts to meet the requirement for varial demand from our customer.

CERTIFICATIONS
Our company got the ISO9001 and IATF16949 certification, and aslo we are awarded the new high-tech enterprice by Chinese government, and we have more than 20 patent.

ADVANTAGES
 • More than 10 years experience on casting and machining
 • Advanced inspection equipment to ensure the tolerance
 • Flexible PO QTY to meet customer demand
 • Professional engineers in casting and machining
 • Competitive price and exllent parts quality
 • Nearby HangZhou port, on-time delivery

PROCESS FLOW

OEM&ODM SERVICE
HangZhou suijin machinery technology can provide the ODM&OEM service for customer, and main is ODM, we can manufacturing the customized parts according to 2D&3D, we have professional R&D team can take part in ealier development phase of the project.

AVALIABLE MATERIA & SURFACE TREATMENT

Avaliable Material
Carbon Steel  Alloy Steel High Chromium Cast Iron Low carbon steel
Stainless Steel Duplex Stainless Steel Steel bar Ductile Cast Iron
Surface treatment
Heat Treatment  Zinc Coating Blackening Mirror Polishing
Satin Polishing Electrolytic Polishing Shot Peening DACROMET

PRODUCT APPLICATION
AUTO PARTS

 • Exhaust inlet/outlet cone                                 • Shift sleeve                                 • Fuel rail bracket  
 • Tempreture sensor boss                                  • Mounting Brackets                      • Oxygen sensor boss 
 • Brake balance block                                        • EGR sensor boss                              • Exhaust valve body

ARCHITECTURAL HARDWARE

 • Mounting Base                                • Mounting plate                                                 • Bearing Covers   
 • Coupling                                          • Grount sleeve                                                  • Sprockets
 • Handle                                             • law glass curtain wall accessories                  • Side Plates                                                                                
AGRICULTURAL MACHINERY PARTS

 • Tooth Blocks                                         • Track shoes                                             • Bucket Teeth   
 • Track Links                                           • Clamping                                                 • Mounting Brackets
 • Lifting Eyes                                           • Quick Joint                                              • Trencher Tooth     
                  
MARINE HARDWARE
 • Star handle                                              • Door hinge                                          • Folding Dock Cleat   
 • Mirror Polished Mooring                          • Hollow base boat rope cleat               • Mounting Brackets

VALVE/PUMP

 • Valve body                                   • Explosion-proof valves                              • Pipe fitting              

OTHERS
The casting part is wildly use in the industries, such as rail&transit parts, bicycle parts, casting impeller, food machine sorting components, solar mounting system parts, container safety parts, Electronic lock body, robot parts and so on, we have more than 20 patents related to this kinds of project in production.    

ADVANCED EQUIPMENTS 

Our company also equiped advance inspection equipment to meet the inspection requirement of the parts, so that we can sure the part can have a good quality.

MAIN EQUIPMENT LIST

Magnetic defect inspection Spectrometer HB hardness inspection Mechanical inspection
Ultrasonic defect inspection Roughness tester HR hardness inspection CMM inspection
Metallographic detector X-ray inspection Dye penetrant inspection 100% Thread inspection

FAQ 

Q1 Are you factory or trading company?
A1 We are factory located in HangZhou city, China
Q2 What kinds of language is avaliable?
A2 English, Chinese, except email cummunication, we are ok with video meeting and calling.
Q3 How should I place an order?
A3 We are receive the PO and production drawing by email.
Q4 Which shipping methed is ok for you?
A4 Normally shipping by sea and train is use for mass production order delivery.
DHL,TNT,FedEx, UPS,EMS air shipment is use for sample delivery.
Q5 How can I contact you?
A5 You can contact us by email, and also we can chat by Skype, Teams, WhatsApp, Facebook.
Q6  What kinds of drawing format can be use?
A6 PRO/E, Auto CAD, Solid Works, IGS, UG, CAD/CAM/CAE, STEP.
Q7 Which packing material do you use for sea shipping?
A7 For sea shipping, we will packaging with European standard wooden pallet.
The parts will packing with PE bag inside the carton box.
Q8 How do you deal with the RFQ?
A8 Sales receiving the RFQ—Feasiblity study meeting with R&D engineer—Feed back technical issues with Customer—Sales quoted

 

Screw Shaft Types and Uses

Various uses for the screw shaft are numerous. Its major diameter is the most significant characteristic, while other aspects include material and function are important. Let us explore these topics in more detail. There are many different types of screw shafts, which include bronze, brass, titanium, and stainless steel. Read on to learn about the most common types. Listed below are some of the most common uses for a screw shaft. These include: C-clamps, screw jacks, vises, and more.
screwshaft

Major diameter of a screw shaft

A screw’s major diameter is measured in fractions of an inch. This measurement is commonly found on the screw label. A screw with a major diameter less than 1/4″ is labeled #0 to #14; those with a larger diameter are labeled fractions of an inch in a corresponding decimal scale. The length of a screw, also known as the shaft, is another measure used for the screw.
The major diameter of a screw shaft is the greater of its 2 outer diameters. When determining the major diameter of a screw, use a caliper, micrometer, or steel rule to make an accurate measurement. Generally, the first number in the thread designation refers to the major diameter. Therefore, if a screw has a thread of 1/2-10 Acme, the major diameter of the thread is.500 inches. The major diameter of the screw shaft will be smaller or larger than the original diameter, so it’s a good idea to measure the section of the screw that’s least used.
Another important measurement is the pitch. This measures the distance between 1 thread’s tip and the next thread’s corresponding point. Pitch is an important measurement because it refers to the distance a screw will advance in 1 turn. While lead and pitch are 2 separate concepts, they are often used interchangeably. As such, it’s important to know how to use them properly. This will make it easier to understand how to select the correct screw.
There are 3 different types of threads. The UTS and ISO metric threads are similar, but their common values for Dmaj and Pmaj are different. A screw’s major diameter is the largest diameter, while the minor diameter is the lowest. A nut’s major diameter, or the minor diameter, is also called the nut’s inside diameter. A bolt’s major diameter and minor diameter are measured with go/no-go gauges or by using an optical comparator.
The British Association and American Society of Mechanical Engineers standardized screw threads in the 1840s. A standard named “British Standard Whitworth” became a common standard for screw threads in the United States through the 1860s. In 1864, William Sellers proposed a new standard that simplified the Whitworth thread and had a 55 degree angle at the tip. Both standards were widely accepted. The major diameter of a screw shaft can vary from 1 manufacturer to another, so it’s important to know what size screw you’re looking for.
In addition to the thread angle, a screw’s major diameter determines the features it has and how it should be used. A screw’s point, or “thread”, is usually spiky and used to drill into an object. A flat tipped screw, on the other hand, is flat and requires a pre-drilled hole for installation. Finally, the diameter of a screw bolt is determined by the major and minor diameters.
screwshaft

Material of a screw shaft

A screw shaft is a piece of machine equipment used to move raw materials. The screw shaft typically comprises a raw material w. For a particular screw to function correctly, the raw material must be sized properly. In general, screw shafts should have an axial-direction length L equal to the moving amount k per 1/2 rotation of the screw. The screw shaft must also have a proper contact angle ph1 in order to prevent raw material from penetrating the screw shaft.
The material used for the shaft depends on its application. A screw with a ball bearing will work better with a steel shaft than 1 made of aluminum. Aluminum screw shafts are the most commonly used for this application. Other materials include titanium. Some manufacturers also prefer stainless steel. However, if you want a screw with a more modern appearance, a titanium shaft is the way to go. In addition to that, screws with a chromium finish have better wear resistance.
The material of a screw shaft is important for a variety of applications. It needs to have high precision threads and ridges to perform its function. Manufacturers often use high-precision CNC machines and lathes to create screw shafts. Different screw shafts can have varying sizes and shapes, and each 1 will have different applications. Listed below are the different materials used for screw shafts. If you’re looking for a high-quality screw shaft, you should shop around.
A lead screw has an inverse relationship between contact surface pressure and sliding velocity. For heavier axial loads, a reduced rotation speed is needed. This curve will vary depending on the material used for the screw shaft and its lubrication conditions. Another important factor is end fixity. The material of a screw shaft can be either fixed or free, so make sure to consider this factor when choosing the material of your screw. The latter can also influence the critical speed and rigidity of the screw.
A screw shaft’s major diameter is the distance between the outer edge of the thread and the inner smooth part. Screw shafts are typically between 2 and 16 millimeters in diameter. They feature a cylindrical shape, a pointy tip, and a wider head and drive than the former. There are 2 basic types of screw heads: threaded and non-threaded. These have different properties and purposes.
Lead screws are a cost-effective alternative to ball screws, and are used for low power and light to medium-duty applications. They offer some advantages, but are not recommended for continuous power transmission. But lead screws are often quieter and smaller, which make them useful for many applications. Besides, they are often used in a kinematic pair with a nut object. They are also used to position objects.
screwshaft

Function of a screw shaft

When choosing a screw for a linear motion system, there are many factors that should be considered, such as the position of the actuator and the screw and nut selection. Other considerations include the overall length of travel, the fastest move profile, the duty cycle, and the repeatability of the system. As a result, screw technology plays a critical role in the overall performance of a system. Here are the key factors to consider when choosing a screw.
Screws are designed with an external threading that digs out material from a surface or object. Not all screw shafts have complete threading, however. These are known as partially threaded screws. Fully threaded screws feature complete external threading on the shaft and a pointed tip. In addition to their use as fasteners, they can be used to secure and tighten many different types of objects and appliances.
Another factor to consider is axial force. The higher the force, the bigger the screw needs to be. Moreover, screws are similar to columns that are subject to both tension and compression loads. During the compression load, bowing or deflection is not desirable, so the integrity of the screw is important. So, consider the design considerations of your screw shaft and choose accordingly. You can also increase the torque by using different shaft sizes.
Shaft collars are also an important consideration. These are used to secure and position components on the shaft. They also act as stroke limiters and to retain sprocket hubs, bearings, and shaft protectors. They are available in several different styles. In addition to single and double split shaft collars, they can be threaded or set screw. To ensure that a screw collar will fit tightly to the shaft, the cap must not be overtightened.
Screws can be cylindrical or conical and vary in length and diameter. They feature a thread that mates with a complementary helix in the material being screwed into. A self-tapping screw will create a complementary helix during driving, creating a complementary helix that allows the screw to work with the material. A screw head is also an essential part of a screw, providing gripping power and compression to the screw.
A screw’s pitch and lead are also important parameters to consider. The pitch of the screw is the distance between the crests of the threads, which increases mechanical advantage. If the pitch is too small, vibrations will occur. If the pitch is too small, the screw may cause excessive wear and tear on the machine and void its intended purpose. The screw will be useless if it can’t be adjusted. And if it can’t fit a shaft with the required diameter, then it isn’t a good choice.
Despite being the most common type, there are various types of screws that differ in their functions. For example, a machine screw has a round head, while a truss head has a lower-profile dome. An oval-its point screw is a good choice for situations where the screw needs to be adjusted frequently. Another type is a soft nylon tip, which looks like a Half-dog point. It is used to grip textured or curved surfaces.

China Professional OEM Manufacturer Customized Sanitary Stainless Steel Meat Grinder Screw/ Worm Screw/Blades with Great qualityChina Professional OEM Manufacturer Customized Sanitary Stainless Steel Meat Grinder Screw/ Worm Screw/Blades with Great quality

China best 12′′ 20K Carbon Steel Flanged Globe Valve JIS Standard with Worm Gear/Handwheel with Free Design Custom

Product Description

12” 20K Carbon steel FLanged Globe Valve JIS Standard with Worm Gear/Handwheel

1. 12” 20K Carbon steel FLanged Globe Valve JIS Standard with Worm Gear/Handwheel Specifications: 

  1. Size: DN15-DN1200
  2. Working Pressure: PN16-PN160
  3. Material: SS304/316/304L/316L(CF8/CF8M/CF3/CF3M), WCB, WCC, LCB, LCC, WC6, WC9, C5, C12, etc
1.12” 20K Carbon steel FLanged Globe Valve JIS Standard with Worm Gear/Handwheel Specifications:

  1. Size: 2~48 in
  2. Working Pressure: 10K/20K/30K
  3. Material:SS304/316/304L/316L(CF8/CF8M/CF3/CF3M),WCB,WCC,LCB,LCC,WC6,WC9, C5,C12, etc
Product Name JIS20K SCPH2 Body Materials RF Flange Globe Valve with Handwheel
1. Material SS304/316/304L/316L ( CF8/CF8M/CF3/CF3M), WCB, WCC, LCB,LCC,WC6,WC9, C5,C12, etc
2. Size 2”~48” ( DN50~DN1200)
3. Thread standard ISO9001 & CE, TS
4. Port Full Port
5. Working Pressure 150LB/300LB/600LB/900LB/1500LB
6. Connection Ends RF, RTJ, FF, Butt-welding.
7. Working Temp. -29~425ºC, or according to customer requirements for different industry.
8. Suitable Medium Water, Natural Gas, Oil and some corrosive liquid
9. Operated Gear Operated, Pneumatic Actuator, Electric Actuator.
10. Inspection & Testing According to API598
Shipment  
Delivery Time 15~20 Days
Package Standard Exporting Plywood Case
Shipping Port HangZhou/ZheJiang , China
Shipping Terms Exw, FOB, CFR, CIF, etc.
Payment Terms T/T, Western Union, PayPal, etc.
  30% prepayment, 70% balance paid before shipping or against copy of BL
Country of Origin HangZhou city, China
Production Capacity 6000 ton/year
MOQ 10 PCS/size

 
 
2.JIS20K SCPH2 Body Materials RF Flange Globe Valve with Handwheel Standards:

  1. Standard Compliance: JIS B2071 2081
  2. Pressure-Temp. Rating: JIS B2073 2083
  3. Face to Face: JIS B2002
  4. End Flange: JIS B2212 2214
  5. Inspection and Test: JIS B2003
  6. Size: 2”~48”
  7. Working Pressure: 10K/20K/30K
  8. Suitable Medium: Oil, Nature Gas, Water, Steam; Acid, Alkali, Organic Compounds

3.JIS20K SCPH2 Body Materials RF Flange Globe Valve with Handwheel Technical Specification:

4.JIS20K SCPH2 Body Materials RF Flange Globe Valve with Handwheel Main dimensions&Weight

JIS20K SCPH2 Body Materials RF Flange Globe Valve with Handwheel can be operated by pneumatic actuator,electric actuator,intelligent control head and manual operation.There are a variety of standards provided to customers,such as,DIN,API,ANSI,and so on

Tips:
    We also manufacture other type valves, as butterfly valve, check valve, globe valve, Y strainer, sanitary butterfly valve, sanitary ball and so on.
   Any item meets your interest, anything confused you, pls keep me posted, let’s talk more.

J-VALVES Service
 

On Samples Buyer bear the air fee, but this fee will be reduced from order directly
On After Sales Free replacement if there is any quality problem
On Delivery Never delay delivery time
On Materials Ensure material pure
Ensure material pure Welcome

J-VALVES Company Information:

J-VALVES Packing Shipping:

FAQ
Q1: We are interested in your products?
A1: In order to recommend you suitable products, please provide detail information, like size, material, pressure, model.
Q2: Is the requirement for MOQ?
A2: For some small size, like 2”-48”(DN50-DN1200), it request the MOQ is 50pcs for each size. Generally speaking, it depends on your order.
Q3: How about the warranty?
A3: The warranty time is 18 months after leaving our factory. We can repair or change because of the quality problems.
Q4: Payment
A4: Mainly T/T, Western Union & PayPal are applicable for us. Payment Term: 30% prepayment, 70% balance paid before shipping or against copy of BL.
Q5: Can you manufacture different standards valves according to customer requirements?
A5: Yes. We can manufacture API,DIN,GOST,JIS standards for different pressure & temperature & size according to different needs.
If you want to know more about our products, please contact freely. We will patiently answer your all questions.

To get more Information at our websites:  http://jiefavalves

J-VALVES Other Products We Manufacture
       
        1.Industry Valves
            Ball Valve
            3 Way Ball Valve
            1 PC Male/Female Thread Ball Valve
            2 PC Male/Female Thread Ball Valve
            3 PC Male/Female Thread Ball Valve
            1 PC Flange/Welding/Union Ball Valve
            2 PC Flange/Welding/Union Ball Valve
            3 PC Flange/Welding/Union Ball Valve
            Globe Valve
            Male/Female Thread Globe Valve
            Flange Globe Valve
            Gate Valve
            Male/Female Thread Gate Valve
            Flange Gate Valve
            Check Valve
            Wafer Check Valve
            Spring Check Valve
            Dual Disc/Plat Wafer Check Valve
            Swing Check Valve
            Flange Check Valve
            Butterfly Valve
            Angle Seat Valve
            Pneumatic Ball Valve
            Pneumatic Angle Seat Valve
            Electric Ball Valve
            Electric Angle Seat Valve
            Y Strainer/Filter
         2.Industry Pipe Fittings
            welded/thread Elbow
            Tee
            Cross
            Cap
            Pipe Hanger
            Hose Joint
            Unions
            Quick connector
            Quick coupling
            Ferrule
            Reducer
            Socket
            Bend
            Plug
            Bushing
            Nipple
            Y-Tee
            Y-Shaped
            Lateral-Tee
            Flange\
          3 .Sanitary valve
            Sanitary Butterfly Valves
            Sanitary Check Valves
            Sanitary Ball Valvess
            Sanitary Reversal Valve
            Sanitary Diaphragm Valves
            Sanitary Sample Valves
            Sanitary Safety Valves
            Sanitary Control Valves
            Sanitary Relief Pressure Valves
        4. Sanitary Pipe Fittings
            Sanitary Elbow
            Sanitary TeeSanitary Reducer
            Sanitary Cross
            Sanitary Triclamp Ferrule
            Sanitary Cap
            Sanitary Pipe Hanger
            Sanitary Tank Cleaning Ball
            Sanitary Hose Joint
            Sanitary Unions
            Sanitary Sight Glass
            Sanitary Strainer

 

ZHangZhoug J-Valves Fluid Equipment Co.,Ltd 

 Web:jiefavalves

 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

2. DIN Standard PN40 WCB Flanged Globe Valve Standards: 

  1. Standard Compliance: DIN 3356
  2. Pressure-Temp. Rating: DIN 2401
  3. Face to Face: DIN 3202
  4. End Flange: DIN 2543-2545 or DIN2501
  5. Butt Welding Ends: DIN 3239
  6. Inspection and Test:DIN3230
  7. Size: DN15-1200
  8. Working Pressure: PN16/PN25/PN40/PN64/PN100/PN160
  9. Suitable Medium: Oil, Nature Gas, Water, Steam; Acid, Alkali, Organic Compounds

3. DIN Standard PN40 WCB Flanged Globe Valve Main dimensions&Weight

DIN Standard PN40 WCB Flanged Globe Valve can be operated by pneumatic actuator, electric actuator, intelligent control head and manual operation. There are a variety of standards provided to customers, such as, DIN, API, ANSI, and so on

Tips: 
We also manufacture other type valves, as butterfly valve, check valve, globe valve, Y strainer, sanitary butterfly valve, sanitary ball and so on. 
Any item meets your interest, anything confused you, pls keep me posted, let’s talk more. 

J-VALVES Service

On Samples Buyer bear the air fee, but this fee will be reduced from order directly
On After Sales Free replacement if there is any quality problem
On Delivery Never delay delivery time
On Materials Ensure material pure
Ensure material pure Welcome

J-VALVES Company Information: 

J-VALVES Packing Shipping: 

FAQ
Q1: We are interested in your products? 
A1: In order to recommend you suitable products, please provide detail information, like size, material, pressure, model. 
Q2: Is the requirement for MOQ? 
A2: For some small size, like 2”-48”(DN50-DN1200), it request the MOQ is 50PCS for each size. Generally speaking, it depends on your order. 
Q3: How about the warranty? 
A3: The warranty time is 18 months after leaving our factory. We can repair or change because of the quality problems. 
Q4: Payment
A4: Mainly T/T, Western Union & PayPal are applicable for us. Payment Term: 30% prepayment, 70% balance paid before shipping or against copy of BL. 
Q5: Can you manufacture different standards valves according to customer requirements? 
A5: Yes. We can manufacture API, DIN, GOST, JIS standards for different pressure & temperature & size according to different needs. 
If you want to know more about our products, please contact freely. We will patiently answer your all questions. 

To get more Information at our websites:http://jiefavalves

J-VALVES Other Products We Manufacture

1. Industry Valves
Ball Valve
3 Way Ball Valve
1 PC Male/Female Thread Ball Valve
2 PC Male/Female Thread Ball Valve
3 PC Male/Female Thread Ball Valve
1 PC Flange/Welding/Union Ball Valve
2 PC Flange/Welding/Union Ball Valve
3 PC Flange/Welding/Union Ball Valve
Globe Valve
Male/Female Thread Globe Valve
Flange Globe Valve
Gate Valve
Male/Female Thread Gate Valve
Flange Gate Valve
Check Valve
Wafer Check Valve
Spring Check Valve
Dual Disc/Plat Wafer Check Valve
Swing Check Valve
Flange Check Valve
Butterfly Valve
Angle Seat Valve
Pneumatic Ball Valve
Pneumatic Angle Seat Valve
Electric Ball Valve
Electric Angle Seat Valve
Y Strainer/Filter
2. Industry Pipe Fittings
Welded/thread Elbow
Tee
Cross
Cap
Pipe Hanger
Hose Joint
Unions
Quick connector
Quick coupling
Ferrule
Reducer
Socket
Bend
Plug
Bushing
Nipple
Y-Tee
Y-Shaped
Lateral-Tee
Flange\
3. Sanitary valve
Sanitary Butterfly Valves
Sanitary Check Valves
Sanitary Ball Valvess
Sanitary Reversal Valve
Sanitary Diaphragm Valves
Sanitary Sample Valves
Sanitary Safety Valves
Sanitary Control Valves
Sanitary Relief Pressure Valves
4. Sanitary Pipe Fittings
Sanitary Elbow
Sanitary TeeSanitary Reducer
Sanitary Cross
Sanitary Triclamp Ferrule
Sanitary Cap
Sanitary Pipe Hanger
Sanitary Tank Cleaning Ball
Sanitary Hose Joint
Sanitary Unions
Sanitary Sight Glass
Sanitary Strainer
 

ZHangZhoug J-Valves Fluid Equipment Co., Ltd

Web: http://jiefavalves

Screw Shaft Types and Uses

Various uses for the screw shaft are numerous. Its major diameter is the most significant characteristic, while other aspects include material and function are important. Let us explore these topics in more detail. There are many different types of screw shafts, which include bronze, brass, titanium, and stainless steel. Read on to learn about the most common types. Listed below are some of the most common uses for a screw shaft. These include: C-clamps, screw jacks, vises, and more.
screwshaft

Major diameter of a screw shaft

A screw’s major diameter is measured in fractions of an inch. This measurement is commonly found on the screw label. A screw with a major diameter less than 1/4″ is labeled #0 to #14; those with a larger diameter are labeled fractions of an inch in a corresponding decimal scale. The length of a screw, also known as the shaft, is another measure used for the screw.
The major diameter of a screw shaft is the greater of its 2 outer diameters. When determining the major diameter of a screw, use a caliper, micrometer, or steel rule to make an accurate measurement. Generally, the first number in the thread designation refers to the major diameter. Therefore, if a screw has a thread of 1/2-10 Acme, the major diameter of the thread is.500 inches. The major diameter of the screw shaft will be smaller or larger than the original diameter, so it’s a good idea to measure the section of the screw that’s least used.
Another important measurement is the pitch. This measures the distance between 1 thread’s tip and the next thread’s corresponding point. Pitch is an important measurement because it refers to the distance a screw will advance in 1 turn. While lead and pitch are 2 separate concepts, they are often used interchangeably. As such, it’s important to know how to use them properly. This will make it easier to understand how to select the correct screw.
There are 3 different types of threads. The UTS and ISO metric threads are similar, but their common values for Dmaj and Pmaj are different. A screw’s major diameter is the largest diameter, while the minor diameter is the lowest. A nut’s major diameter, or the minor diameter, is also called the nut’s inside diameter. A bolt’s major diameter and minor diameter are measured with go/no-go gauges or by using an optical comparator.
The British Association and American Society of Mechanical Engineers standardized screw threads in the 1840s. A standard named “British Standard Whitworth” became a common standard for screw threads in the United States through the 1860s. In 1864, William Sellers proposed a new standard that simplified the Whitworth thread and had a 55 degree angle at the tip. Both standards were widely accepted. The major diameter of a screw shaft can vary from 1 manufacturer to another, so it’s important to know what size screw you’re looking for.
In addition to the thread angle, a screw’s major diameter determines the features it has and how it should be used. A screw’s point, or “thread”, is usually spiky and used to drill into an object. A flat tipped screw, on the other hand, is flat and requires a pre-drilled hole for installation. Finally, the diameter of a screw bolt is determined by the major and minor diameters.
screwshaft

Material of a screw shaft

A screw shaft is a piece of machine equipment used to move raw materials. The screw shaft typically comprises a raw material w. For a particular screw to function correctly, the raw material must be sized properly. In general, screw shafts should have an axial-direction length L equal to the moving amount k per 1/2 rotation of the screw. The screw shaft must also have a proper contact angle ph1 in order to prevent raw material from penetrating the screw shaft.
The material used for the shaft depends on its application. A screw with a ball bearing will work better with a steel shaft than 1 made of aluminum. Aluminum screw shafts are the most commonly used for this application. Other materials include titanium. Some manufacturers also prefer stainless steel. However, if you want a screw with a more modern appearance, a titanium shaft is the way to go. In addition to that, screws with a chromium finish have better wear resistance.
The material of a screw shaft is important for a variety of applications. It needs to have high precision threads and ridges to perform its function. Manufacturers often use high-precision CNC machines and lathes to create screw shafts. Different screw shafts can have varying sizes and shapes, and each 1 will have different applications. Listed below are the different materials used for screw shafts. If you’re looking for a high-quality screw shaft, you should shop around.
A lead screw has an inverse relationship between contact surface pressure and sliding velocity. For heavier axial loads, a reduced rotation speed is needed. This curve will vary depending on the material used for the screw shaft and its lubrication conditions. Another important factor is end fixity. The material of a screw shaft can be either fixed or free, so make sure to consider this factor when choosing the material of your screw. The latter can also influence the critical speed and rigidity of the screw.
A screw shaft’s major diameter is the distance between the outer edge of the thread and the inner smooth part. Screw shafts are typically between 2 and 16 millimeters in diameter. They feature a cylindrical shape, a pointy tip, and a wider head and drive than the former. There are 2 basic types of screw heads: threaded and non-threaded. These have different properties and purposes.
Lead screws are a cost-effective alternative to ball screws, and are used for low power and light to medium-duty applications. They offer some advantages, but are not recommended for continuous power transmission. But lead screws are often quieter and smaller, which make them useful for many applications. Besides, they are often used in a kinematic pair with a nut object. They are also used to position objects.
screwshaft

Function of a screw shaft

When choosing a screw for a linear motion system, there are many factors that should be considered, such as the position of the actuator and the screw and nut selection. Other considerations include the overall length of travel, the fastest move profile, the duty cycle, and the repeatability of the system. As a result, screw technology plays a critical role in the overall performance of a system. Here are the key factors to consider when choosing a screw.
Screws are designed with an external threading that digs out material from a surface or object. Not all screw shafts have complete threading, however. These are known as partially threaded screws. Fully threaded screws feature complete external threading on the shaft and a pointed tip. In addition to their use as fasteners, they can be used to secure and tighten many different types of objects and appliances.
Another factor to consider is axial force. The higher the force, the bigger the screw needs to be. Moreover, screws are similar to columns that are subject to both tension and compression loads. During the compression load, bowing or deflection is not desirable, so the integrity of the screw is important. So, consider the design considerations of your screw shaft and choose accordingly. You can also increase the torque by using different shaft sizes.
Shaft collars are also an important consideration. These are used to secure and position components on the shaft. They also act as stroke limiters and to retain sprocket hubs, bearings, and shaft protectors. They are available in several different styles. In addition to single and double split shaft collars, they can be threaded or set screw. To ensure that a screw collar will fit tightly to the shaft, the cap must not be overtightened.
Screws can be cylindrical or conical and vary in length and diameter. They feature a thread that mates with a complementary helix in the material being screwed into. A self-tapping screw will create a complementary helix during driving, creating a complementary helix that allows the screw to work with the material. A screw head is also an essential part of a screw, providing gripping power and compression to the screw.
A screw’s pitch and lead are also important parameters to consider. The pitch of the screw is the distance between the crests of the threads, which increases mechanical advantage. If the pitch is too small, vibrations will occur. If the pitch is too small, the screw may cause excessive wear and tear on the machine and void its intended purpose. The screw will be useless if it can’t be adjusted. And if it can’t fit a shaft with the required diameter, then it isn’t a good choice.
Despite being the most common type, there are various types of screws that differ in their functions. For example, a machine screw has a round head, while a truss head has a lower-profile dome. An oval-its point screw is a good choice for situations where the screw needs to be adjusted frequently. Another type is a soft nylon tip, which looks like a Half-dog point. It is used to grip textured or curved surfaces.

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China Custom 3 Size Iron Worm Drive Hose Clips High Hose Clamp Fuel Pipe Tube Fastening Gear Clamp Water Pipe Fixed Buckles with high quality

Product Description

Iron Drive Hose Clips

Description:
This is a set of hose clamps used to attach and seal a hose CZPT a fitting such as a barb or pipe nipple.
These hose clamps are made from high quality material for durability and long service life.
Screw hose clamps are convenient to install or remove by using a screwdriver to release or tighten.
These well designed screw clamps are very useful and provide great clamping force.
Widely used for connecting air hoses, water pipes, fuel hoses, silicone hoses on automobiles or factory, etc.

Size specification:
3/4″ :10~19mm
5/8″ : 6~16mm
1/2″ : 6~13mm

 

Packaging & Shipping
Company Profile

ZheJiang FLY E-COMMERCE CO., LTD. is a professional company engaged in the research, development, sale and service of spray nozzles, drippers, water hose, plastic connectors, hydroponic accessories. We are located in HangZhou City, ZheJiang Province with convenient transportation access. Dedicated to strict quality control and thoughtful customer service, our experienced staff members are always available to discuss your requirements, professional products and ensure full customer satisfaction. Our products are exported to clients in such countries and regions as South Korea,Vietnam,Thailand, Indonesia,South Asia,UK,Germany,Poland,United States,Europe,North America. ZheJiang FLY provides precision irrigation solutions to industries such as agriculture , greenhouses, landscapes and mining through professional agronomy, irrigation technology and supply chain capabilities. We fully consider the needs of irrigation professionals when designing, providing high-quality for the irrigation, outdoor lighting and custom molding industries Quality, efficient solutions. From residential landscapes to stadiums, national landmarks, theme parks, city parks, commercial complexes, hotels and municipal buildings, our diverse products can be seen everywhere. Whether you are from New York,Sydney, Paris, Moscow or London, you may have encountered our products on this journey.
ZheJiang FLY keep helping customers around the world achieve less investment and gain more.
FAQ

Q: Can I get some samples?

A: Yes,Sample Orders Welcomed.

Q: Can you give me a discount?
A: We mainly do wholesale services. Our policy is to have a larger quantity and a cheaper price, so we will give you the best price based on the quantity of your order.

Q: The shipping cost is too high. Can you give me a cheaper shipping fee?
A: When we calculate the shipping cost for you, we will use the cheapest and safest delivery, and it is the transportation company that asks us to pay. We can’t give you any cheaper or free, please understand. But we can guarantee that we will not ask you to pay more shipping costs, if you think it is too expensive, we can use your own transportation company or agent in China.

Screw Shaft Types

A screw shaft is a cylindrical part that turns. Depending on its size, it is able to drive many different types of devices. The following information outlines the different types of screws, including their sizes, material, function, and applications. To help you select the right screw shaft, consider the following factors:
screwshaft

Size

A screw can come in a variety of shapes and sizes, ranging from a quarter to a quarter-inch in diameter. A screw is a cylindrical shaft with an inclined plane wrapped around it, and its main function is to fasten objects together by translating torque into a linear force. This article will discuss the dimensions of screws and how to determine the size of a screw. It is important to note that screw sizes can be large and small depending on the purpose.
The diameter of a screw is the diameter of its shaft, and it must match the inner diameter of its nuts and washers. Screws of a certain diameter are also called machine screws, and they can be larger or smaller. Screw diameters are measured on the shaft underneath the screw head. The American Society of Mechanical Engineers (ASME) standardized screw diameters in 3/50-inch to 16 (3/8-inch) inches, and more recently, sizes were added in U.S. fractions of an inch. While shaft and head diameters are standardized, screw length may vary from job to job.
In the case of the 2.3-mm screw group, the construct strength was not improved by the 1.2-mm group. The smaller screw size did not increase the strength of the construct. Further, ABS material did not improve the construct strength. Thus, the size of screw shaft is an important consideration in model design. And remember that the more complex your model is, the larger it will be. A screw of a given size will have a similar failure rate as a screw of a different diameter.
Although different screw sizes are widely used, the differences in screw size were not statistically significant. Although there are some limitations, screws of different sizes are generally sufficient for fixation of a metacarpal shaft fracture. However, further clinical studies are needed to compare screw sizes for fracture union rates. So, if you are unsure of what size of screw shaft you need for your case, make sure to check the metric chart and ensure you use the right one.
screwshaft

Material

The material of a screw shaft plays an important role in the overall performance of a screw. Axial and central forces act to apply torque to the screw, while external forces, such as friction, exert a bending moment. The torsional moments are reflected in the torque, and this causes the screw to rotate at a higher rate than necessary. To ensure the longevity of the screw, the material of the screw shaft should be able to handle the bending moment, while the diameter of the shaft should be small enough to avoid causing damage.
Screws are made from different metals, such as steel, brass, titanium, and bronze. Manufacturers often apply a top coating of chromium, brass, or zinc to improve corrosion resistance. Screws made of aluminum are not durable and are prone to rusting due to exposure to weather conditions. The majority of screw shafts are self-locking. They are suited for many applications, including threaded fasteners, C-clamps, and vises.
Screws that are fabricated with conical sections typically feature reduced open cross-sectional areas at the discharge point. This is a key design parameter of conical screw shafts. In fact, reductions of up to 72% are common across a variety of applications. If the screw is designed to have a hard-iron hanger bearing, it must be hardened. If the screw shaft is not hardened, it will require an additional lubricant.
Another consideration is the threads. Screw shafts are typically made of high-precision threads and ridges. These are manufactured on lathes and CNC machines. Different shapes require different materials. Materials for the screw shaft vary. There are many different sizes and shapes available, and each 1 has its own application. In addition to helical and conical screw shafts, different materials are also available. When choosing material, the best 1 depends on the application.
The life of the screw depends on its size, load, and design. In general, the material of the screw shaft, nut body, and balls and rollers determine its fatigue life. This affects the overall life of the screw. To determine whether a specific screw has a longer or shorter life, the manufacturer must consider these factors, as well as the application requirements. The material should be clean and free of imperfections. It should be smooth and free of cracks or flaking, which may result in premature failure.

Function

The function of a screw shaft is to facilitate the rotation of a screw. Screws have several thread forms, including single-start, double-start and multi-start. Each form has its own advantages and disadvantages. In this article we’ll explore each of them in detail. The function of a screw shaft can vary based on its design, but the following are common types. Here are some examples of screw shaft types and their purposes.
The screw’s torque enables it to lift objects. It can be used in conjunction with a bolt and nut to lift a load. Screws are also used to secure objects together. You can use them in screw presses, vises, and screw jacks. But their primary function is to hold objects together. Listed below are some of their main functions. When used to lift heavy loads, they can provide the required force to secure an object.
Screws can be classified into 2 types: square and round. Square threads are more efficient than round ones because they apply 0deg of angle to the nut. Square threads are also stronger than round threads and are often used in high-load applications. They’re generally cheaper to manufacture and are more difficult to break. And unlike square threads, which have a 0deg thread angle, these threads can’t be broken easily with a screwdriver.
A screw’s head is made of a series of spiral-like structures that extend from a cylindrical part to a tip. This portion of the screw is called the shank and is made of the smallest area. The shank is the portion that applies more force to the object. As the shaft extends from the head, it becomes thinner and narrow, forming a pointed tip. The head is the most important part of the screw, so it needs to be strong to perform its function.
The diameter of the screw shaft is measured in millimeters. The M8 screw has a thread pitch of 1.25 mm. Generally, the size of the screw shaft is indicated by the major and minor diameter. These dimensions are appended with a multiplication sign (M8x1).
screwshaft

Applications

The design of screws, including their size and shape, determines their critical rotating speeds. These speeds depend on the threaded part of the screw, the helix angle, and the geometry of the contact surfaces. When applied to a screw, these limits are referred to as “permissible speed limits.” These maximum speeds are meant for short periods of time and optimized running conditions. Continuous operation at these speeds can reduce the calculated life of a nut mechanism.
The main materials used to manufacture screws and screw shafts include steel, stainless steel, titanium, bronze, and brass. Screws may be coated for corrosion resistance, or they may be made of aluminium. Some materials can be threaded, including Teflon and nylon. Screw threads can even be molded into glass or porcelain. For the most part, steel and stainless steel are the most common materials for screw shafts. Depending on the purpose, a screw will be made of a material that is suitable for the application.
In addition to being used in fasteners, screw shafts are used in micrometers, drillers, conveyor belts, and helicopter blades. There are numerous applications of screw shafts, from weighing scales to measuring lengths. If you’re in the market for a screw, make sure to check out these applications. You’ll be happy you did! They can help you get the job done faster. So, don’t delay your next project.
If you’re interested in learning about screw sizing, then it’s important to know the axial and moment loads that your screws will experience. By following the laws of mechanics and knowing the load you can calculate the nominal life of your screw. You can also consider the effect of misalignment, uneven loading, and shocks on your screw. These will all affect the life of your screw. Then, you can select the right screw.

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China Best Sales Double Worm Gearing Arrangement Reducer near me manufacturer

Product Description

  

 

Company Profile

 

Packing Details:

Neutral packing: Individual box for inner packing and carton for outer packing.
Special packing: As customer’s design and requirements.

 

FAQ

Q1. What are your packaging conditions?
A: Usually, we pack the goods in neutral boxes and brown cartons. If you have a legally registered patent, We will pack the goods in your brand box upon receipt of your authorization.
Q2. What are your terms of payment?
A: T/T is 30% of the deposit and 70% before delivery.Before you pay your balance, we will show you a photo of the produet and paekaging.
Q3. What are your delivery conditions?
A: EXW, FOB, CFR, CIF, DDU.
Q4. What is your delivery time?
A: It usually takes 15 to 30 days to receive your advance payment. The exact delivery time depends The items and quantities you ordered.
Q5, Can I produce according to the sample?
A: Yes, we can produce according to your sample or technical drawings. We can make molds and fixtures.
Q6. Will you test all the items before shipping?
A: Yes, we were 100% tested before delivery
Q7. How do you maintain a long-term relationship with our business?
A: 1. We maintain good quality and competitive prices to ensure that customers benefit;We respect every customer and regard them as our friends,No matter where they come from, we do business with them and make friends in good faith.

 

Screw Shaft Features Explained

When choosing the screw shaft for your application, you should consider the features of the screws: threads, lead, pitch, helix angle, and more. You may be wondering what these features mean and how they affect the screw’s performance. This article explains the differences between these factors. The following are the features that affect the performance of screws and their properties. You can use these to make an informed decision and purchase the right screw. You can learn more about these features by reading the following articles.

Threads

The major diameter of a screw thread is the larger of the 2 extreme diameters. The major diameter of a screw is also known as the outside diameter. This dimension can’t be directly measured, but can be determined by measuring the distance between adjacent sides of the thread. In addition, the mean area of a screw thread is known as the pitch. The diameter of the thread and pitch line are directly proportional to the overall size of the screw.
The threads are classified by the diameter and pitch. The major diameter of a screw shaft has the largest number of threads; the smaller diameter is called the minor diameter. The thread angle, also known as the helix angle, is measured perpendicular to the axis of the screw. The major diameter is the largest part of the screw; the minor diameter is the lower end of the screw. The thread angle is the half distance between the major and minor diameters. The minor diameter is the outer surface of the screw, while the top surface corresponds to the major diameter.
The pitch is measured at the crest of a thread. In other words, a 16-pitch thread has a diameter of 1 sixteenth of the screw shaft’s diameter. The actual diameter is 0.03125 inches. Moreover, a large number of manufacturers use this measurement to determine the thread pitch. The pitch diameter is a critical factor in successful mating of male and female threads. So, when determining the pitch diameter, you need to check the thread pitch plate of a screw.
screwshaft

Lead

In screw shaft applications, a solid, corrosion-resistant material is an important requirement. Lead screws are a robust choice, which ensure shaft direction accuracy. This material is widely used in lathes and measuring instruments. They have black oxide coatings and are suited for environments where rusting is not acceptable. These screws are also relatively inexpensive. Here are some advantages of lead screws. They are highly durable, cost-effective, and offer high reliability.
A lead screw system may have multiple starts, or threads that run parallel to each other. The lead is the distance the nut travels along the shaft during a single revolution. The smaller the lead, the tighter the thread. The lead can also be expressed as the pitch, which is the distance between adjacent thread crests or troughs. A lead screw has a smaller pitch than a nut, and the smaller the lead, the greater its linear speed.
When choosing lead screws, the critical speed is the maximum number of revolutions per minute. This is determined by the minor diameter of the shaft and its length. The critical speed should never be exceeded or the lead will become distorted or cracked. The recommended operational speed is around 80 percent of the evaluated critical speed. Moreover, the lead screw must be properly aligned to avoid excessive vibrations. In addition, the screw pitch must be within the design tolerance of the shaft.

Pitch

The pitch of a screw shaft can be viewed as the distance between the crest of a thread and the surface where the threads meet. In mathematics, the pitch is equivalent to the length of 1 wavelength. The pitch of a screw shaft also relates to the diameter of the threads. In the following, the pitch of a screw is explained. It is important to note that the pitch of a screw is not a metric measurement. In the following, we will define the 2 terms and discuss how they relate to 1 another.
A screw’s pitch is not the same in all countries. The United Kingdom, Canada, and the United States have standardized screw threads according to the UN system. Therefore, there is a need to specify the pitch of a screw shaft when a screw is being manufactured. The standardization of pitch and diameter has also reduced the cost of screw manufacturing. Nevertheless, screw threads are still expensive. The United Kingdom, Canada, and the United States have introduced a system for the calculation of screw pitch.
The pitch of a lead screw is the same as that of a lead screw. The diameter is 0.25 inches and the circumference is 0.79 inches. When calculating the mechanical advantage of a screw, divide the diameter by its pitch. The larger the pitch, the more threads the screw has, increasing its critical speed and stiffness. The pitch of a screw shaft is also proportional to the number of starts in the shaft.

Helix angle

The helix angle of a screw shaft is the angle formed between the circumference of the cylinder and its helix. Both of these angles must be equal to 90 degrees. The larger the lead angle, the smaller the helix angle. Some reference materials refer to angle B as the helix angle. However, the actual angle is derived from calculating the screw geometry. Read on for more information. Listed below are some of the differences between helix angles and lead angles.
High helix screws have a long lead. This length reduces the number of effective turns of the screw. Because of this, fine pitch screws are usually used for small movements. A typical example is a 16-mm x 5-inch screw. Another example of a fine pitch screw is a 12x2mm screw. It is used for small moves. This type of screw has a lower lead angle than a high-helix screw.
A screw’s helix angle refers to the relative angle of the flight of the helix to the plane of the screw axis. While screw helix angles are not often altered from the standard square pitch, they can have an effect on processing. Changing the helix angle is more common in two-stage screws, special mixing screws, and metering screws. When a screw is designed for this function, it should be able to handle the materials it is made of.
screwshaft

Size

The diameter of a screw is its diameter, measured from the head to the shaft. Screw diameters are standardized by the American Society of Mechanical Engineers. The diameters of screws range from 3/50 inches to 16 inches, and more recently, fractions of an inch have been added. However, shaft diameters may vary depending on the job, so it is important to know the right size for the job. The size chart below shows the common sizes for screws.
Screws are generally referred to by their gauge, which is the major diameter. Screws with a major diameter less than a quarter of an inch are usually labeled as #0 to #14 and larger screws are labeled as sizes in fractions of an inch. There are also decimal equivalents of each screw size. These measurements will help you choose the correct size for your project. The screws with the smaller diameters were not tested.
In the previous section, we described the different shaft sizes and their specifications. These screw sizes are usually indicated by fractions of an inch, followed by a number of threads per inch. For example, a ten-inch screw has a shaft size of 2” with a thread pitch of 1/4″, and it has a diameter of 2 inches. This screw is welded to a two-inch Sch. 40 pipe. Alternatively, it can be welded to a 9-inch O.A.L. pipe.
screwshaft

Shape

Screws come in a wide variety of sizes and shapes, from the size of a quarter to the diameter of a U.S. quarter. Screws’ main function is to hold objects together and to translate torque into linear force. The shape of a screw shaft, if it is round, is the primary characteristic used to define its use. The following chart shows how the screw shaft differs from a quarter:
The shape of a screw shaft is determined by 2 features: its major diameter, or distance from the outer edge of the thread on 1 side to the inner smooth surface of the shaft. These are generally 2 to 16 millimeters in diameter. Screw shafts can have either a fully threaded shank or a half-threaded shank, with the latter providing better stability. Regardless of whether the screw shaft is round or domed, it is important to understand the different characteristics of a screw before attempting to install it into a project.
The screw shaft’s diameter is also important to its application. The ball circle diameter refers to the distance between the center of 2 opposite balls in contact with the grooves. The root diameter, on the other hand, refers to the distance between the bottommost grooves of the screw shaft. These are the 2 main measurements that define the screw’s overall size. Pitch and nominal diameter are important measurements for a screw’s performance in a particular application.

Lubrication

In most cases, lubrication of a screw shaft is accomplished with grease. Grease is made up of mineral or synthetic oil, thickening agent, and additives. The thickening agent can be a variety of different substances, including lithium, bentonite, aluminum, and barium complexes. A common classification for lubricating grease is NLGI Grade. While this may not be necessary when specifying the type of grease to use for a particular application, it is a useful qualitative measure.
When selecting a lubricant for a screw shaft, the operating temperature and the speed of the shaft determine the type of oil to use. Too much oil can result in heat buildup, while too little can lead to excessive wear and friction. The proper lubrication of a screw shaft directly affects the temperature rise of a ball screw, and the life of the assembly. To ensure the proper lubrication, follow the guidelines below.
Ideally, a low lubrication level is appropriate for medium-sized feed stuff factories. High lubrication level is appropriate for larger feed stuff factories. However, in low-speed applications, the lubrication level should be sufficiently high to ensure that the screws run freely. This is the only way to reduce friction and ensure the longest life possible. Lubrication of screw shafts is an important consideration for any screw.

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China Best Sales Reducer Gear Japan Motor Worm Mill CNC Lathe with Live Tooling with Free Design Custom

Product Description

DAS DS-25WS/25WL Outer/Inner Whirlwind Milling CNC Lathe Machine
(Optional Automation)

Product Description

1.Machine tool base is resin sand cast integrally, boasts high vibration resistance, small machine deformation.

 

2. Yaskawa servo drive is used for main shaft to ensure the high precision requirement of multiple thread screw.

 

3.The main shaft contains high precision Japan NSK precise bearing with the inner cone of main shaft directly mounted with elastic chuck in order to ensure the rotation precision.

 

4.ZheJiang famous HIWIN / PMI high-precision Class P3 ball-bearing screw rod is used for the transmission portion of the machine tool.

 

5.The machine USES ZheJiang SYNTEC system, Japan YASKAWA servo motor control.

 

6.Machine adopts roller CZPT rail structure, can withstand the larger cutting and resistance to impact.

 

7.The machine can be used for processing single head or multi-head worm.

 

8. Cutter shaft can realize large angle rotation.

 

 

Model

DS-25W

Max.Processing length(mm)

250

Max.processing modulus(m)

1.5

Max.processing diameter(mm)

32

Tailstock function

Have(optional)

Knife CZPT bush

Have

Milling Type

Outer Whirlwind Milling

Spindle Max.speed(r/min)

1500

Spindle motor power(KW)

5.9

Tool shaft Max. speed

3000(factory setting)

Tool shaft motor power(KW)

3.1

Tool form

Forming Tool

Max.installed tool quantity

1

System Min.resolution

0.001

X/Z axis travel(mm)

100/250

X/Z axis fast moving speed(r/min)

12

X/Z axis repeatability(mm)

±0.005

Taper(mm)

≤0.005/100

Circle processing precision(mm)

≤0.003

X axis motor power(KW)

1.3

Z axis motor power(KW)

1.3

Hydraulic motor power(KW)

0.75

Water tank motor power(KW)

0.12

Coolant tank capacity(L)

100

Machine power(kw)

22

Net Weight(KG)

2800

Machine Dimensions(LxWxH)(mm)

1700*1600*1900

1. Machine tool control system uses ZheJiang SYNTEC 6TA-T3S system. Other Brand including GSK,Fanuc,Siemens are OK!

2. Machine body is cast in 1 piece. The lathe bed tilts by 45°and the inclined placement of lathe carriage.

3.ZheJiang ‘s high-precision spindle, comprising Japan CZPT precise bearings; three-jaw hydraulic chuck or other elastic clamp can be directly fitted on the main shaft flange.

4.The drive part of machine tool uses HIWIN/PMI high precision P3 class ball bearing screw and high speed linear slide rail.

Good Feedback

     HangZhou Xihu (West Lake) Dis. Guoqiang Daosheng Industrial Co., Ltd. is located in Chencun, the important machinery town in Xihu (West Lake) Dis. District,HangZhou. Sticking to the human-centering management, we are in possession of a group of highly competent technical personnel, a market oriented experienced sales team. In the gesture of sincere cooperation, we strive to establish a promise keeping and quality .

     Our major products include CNC series gang tool type lathes , turret lathes, take heart-type lathes and milling-type lathes, featuring space saving, low cost and diversified arrangement etc.

They can also meet the demand for precise processing of different products. The products find widespread application in the manufacture of cars, motorcycles and accessories thereof,electronic industry, optical instruments, clocks and watches as well as special motors etc.

     We have precise lathe equipment, complete quality guarantee system, prompt goods supply as well as perfect after-sales service,which ensure us the first consideration when you purchase high-precision machine tools.

What Are Screw Shaft Threads?

A screw shaft is a threaded part used to fasten other components. The threads on a screw shaft are often described by their Coefficient of Friction, which describes how much friction is present between the mating surfaces. This article discusses these characteristics as well as the Material and Helix angle. You’ll have a better understanding of your screw shaft’s threads after reading this article. Here are some examples. Once you understand these details, you’ll be able to select the best screw nut for your needs.
screwshaft

Coefficient of friction between the mating surfaces of a nut and a screw shaft

There are 2 types of friction coefficients. Dynamic friction and static friction. The latter refers to the amount of friction a nut has to resist an opposing motion. In addition to the material strength, a higher coefficient of friction can cause stick-slip. This can lead to intermittent running behavior and loud squeaking. Stick-slip may lead to a malfunctioning plain bearing. Rough shafts can be used to improve this condition.
The 2 types of friction coefficients are related to the applied force. When applying force, the applied force must equal the nut’s pitch diameter. When the screw shaft is tightened, the force may be removed. In the case of a loosening clamp, the applied force is smaller than the bolt’s pitch diameter. Therefore, the higher the property class of the bolt, the lower the coefficient of friction.
In most cases, the screwface coefficient of friction is lower than the nut face. This is because of zinc plating on the joint surface. Moreover, power screws are commonly used in the aerospace industry. Whether or not they are power screws, they are typically made of carbon steel, alloy steel, or stainless steel. They are often used in conjunction with bronze or plastic nuts, which are preferred in higher-duty applications. These screws often require no holding brakes and are extremely easy to use in many applications.
The coefficient of friction between the mating surfaces of t-screws is highly dependent on the material of the screw and the nut. For example, screws with internal lubricated plastic nuts use bearing-grade bronze nuts. These nuts are usually used on carbon steel screws, but can be used with stainless steel screws. In addition to this, they are easy to clean.

Helix angle

In most applications, the helix angle of a screw shaft is an important factor for torque calculation. There are 2 types of helix angle: right and left hand. The right hand screw is usually smaller than the left hand one. The left hand screw is larger than the right hand screw. However, there are some exceptions to the rule. A left hand screw may have a greater helix angle than a right hand screw.
A screw’s helix angle is the angle formed by the helix and the axial line. Although the helix angle is not usually changed, it can have a significant effect on the processing of the screw and the amount of material conveyed. These changes are more common in 2 stage and special mixing screws, and metering screws. These measurements are crucial for determining the helix angle. In most cases, the lead angle is the correct angle when the screw shaft has the right helix angle.
High helix screws have large leads, sometimes up to 6 times the screw diameter. These screws reduce the screw diameter, mass, and inertia, allowing for higher speed and precision. High helix screws are also low-rotation, so they minimize vibrations and audible noises. But the right helix angle is important in any application. You must carefully choose the right type of screw for the job at hand.
If you choose a screw gear that has a helix angle other than parallel, you should select a thrust bearing with a correspondingly large center distance. In the case of a screw gear, a 45-degree helix angle is most common. A helix angle greater than zero degrees is also acceptable. Mixing up helix angles is beneficial because it allows for a variety of center distances and unique applications.
screwshaft

Thread angle

The thread angle of a screw shaft is measured from the base of the head of the screw to the top of the screw’s thread. In America, the standard screw thread angle is 60 degrees. The standard thread angle was not widely adopted until the early twentieth century. A committee was established by the Franklin Institute in 1864 to study screw threads. The committee recommended the Sellers thread, which was modified into the United States Standard Thread. The standardized thread was adopted by the United States Navy in 1868 and was recommended for construction by the Master Car Builders’ Association in 1871.
Generally speaking, the major diameter of a screw’s threads is the outside diameter. The major diameter of a nut is not directly measured, but can be determined with go/no-go gauges. It is necessary to understand the major and minor diameters in relation to each other in order to determine a screw’s thread angle. Once this is known, the next step is to determine how much of a pitch is necessary to ensure a screw’s proper function.
Helix angle and thread angle are 2 different types of angles that affect screw efficiency. For a lead screw, the helix angle is the angle between the helix of the thread and the line perpendicular to the axis of rotation. A lead screw has a greater helix angle than a helical one, but has higher frictional losses. A high-quality lead screw requires a higher torque to rotate. Thread angle and lead angle are complementary angles, but each screw has its own specific advantages.
Screw pitch and TPI have little to do with tolerances, craftsmanship, quality, or cost, but rather the size of a screw’s thread relative to its diameter. Compared to a standard screw, the fine and coarse threads are easier to tighten. The coarser thread is deeper, which results in lower torques. If a screw fails because of torsional shear, it is likely to be a result of a small minor diameter.

Material

Screws have a variety of different sizes, shapes, and materials. They are typically machined on CNC machines and lathes. Each type is used for different purposes. The size and material of a screw shaft are influenced by how it will be used. The following sections give an overview of the main types of screw shafts. Each 1 is designed to perform a specific function. If you have questions about a specific type, contact your local machine shop.
Lead screws are cheaper than ball screws and are used in light-duty, intermittent applications. Lead screws, however, have poor efficiency and are not recommended for continuous power transmission. But, they are effective in vertical applications and are more compact. Lead screws are typically used as a kinematic pair with a ball screw. Some types of lead screws also have self-locking properties. Because they have a low coefficient of friction, they have a compact design and very few parts.
Screws are made of a variety of metals and alloys. Steel is an economical and durable material, but there are also alloy steel and stainless steel types. Bronze nuts are the most common and are often used in higher-duty applications. Plastic nuts provide low-friction, which helps reduce the drive torques. Stainless steel screws are also used in high-performance applications, and may be made of titanium. The materials used to create screw shafts vary, but they all have their specific functions.
Screws are used in a wide range of applications, from industrial and consumer products to transportation equipment. They are used in many different industries, and the materials they’re made of can determine their life. The life of a screw depends on the load that it bears, the design of its internal structure, lubrication, and machining processes. When choosing screw assemblies, look for a screw made from the highest quality steels possible. Usually, the materials are very clean, so they’re a great choice for a screw. However, the presence of imperfections may cause a normal fatigue failure.
screwshaft

Self-locking features

Screws are known to be self-locking by nature. The mechanism for this feature is based on several factors, such as the pitch angle of the threads, material pairing, lubrication, and heating. This feature is only possible if the shaft is subjected to conditions that are not likely to cause the threads to loosen on their own. The self-locking ability of a screw depends on several factors, including the pitch angle of the thread flank and the coefficient of sliding friction between the 2 materials.
One of the most common uses of screws is in a screw top container lid, corkscrew, threaded pipe joint, vise, C-clamp, and screw jack. Other applications of screw shafts include transferring power, but these are often intermittent and low-power operations. Screws are also used to move material in Archimedes’ screw, auger earth drill, screw conveyor, and micrometer.
A common self-locking feature for a screw is the presence of a lead screw. A screw with a low PV value is safe to operate, but a screw with high PV will need a lower rotation speed. Another example is a self-locking screw that does not require lubrication. The PV value is also dependent on the material of the screw’s construction, as well as its lubrication conditions. Finally, a screw’s end fixity – the way the screw is supported – affects the performance and efficiency of a screw.
Lead screws are less expensive and easier to manufacture. They are a good choice for light-weight and intermittent applications. These screws also have self-locking capabilities. They can be self-tightened and require less torque for driving than other types. The advantage of lead screws is their small size and minimal number of parts. They are highly efficient in vertical and intermittent applications. They are not as accurate as lead screws and often have backlash, which is caused by insufficient threads.

China Best Sales Reducer Gear Japan Motor Worm Mill CNC Lathe with Live Tooling with Free Design CustomChina Best Sales Reducer Gear Japan Motor Worm Mill CNC Lathe with Live Tooling with Free Design Custom

China Hot selling CZPT Fertilizer Flexible Carbon Steel Cement U Type Pellet Helical Worm Screw Conveyor Feeder Filling Machine with Hopper with Free Design Custom

Product Description

Product Description

The screw conveyor in the 2 entities of seamless steel tubes are provided with a spiral, which is a left-handed, the other is right-handed. When 2 screws working position by a pair of shaft end gear is rotated ,due to the rotation of the screw member, so that the material for axial movement, so as to achieve the purpose of transportation.

Detailed Photos

It is with simple structure, small cross sectional dimension, good sealing performance, low cost and easy operation. It is convenient to feed and discharge during operation, and the conveying direction can be opposite. Materials can be mixed, agitated, heated and cooled during conveying. Besides, material flow can be adjusted by loading/unloading value.Product principle
It is composed of driving device, enclosed tank and screw. Materials in the tank are transported.Main Features:
1,Hanging bearing, head, tail shaft connected with the screw shaft are made by tongue-type embedded, installation and removal does not require axial movement, and easy maintenance. Mandrel length, hanging, fewer points of failure.
2, Using adjustable structure, increase the hanging bearing volume, bearing contact with the material to avoid hanging, hanging bearing life can be more than 2 years.
3,Transmission parts are floating connection, suspended bearings universal structure, the spiral, hanging bearing and tail always formed an integral spin float within a certain range can convey resistance to rotate freely avoidance, not the material, not blocking material.
4,Head and tail are in the bearing housing, all bearings are sealed box with multi-layer sealing technology, long life bearings.
5,Compared with other transportation equipment, the machine has a small cross-sectional size of it, the sealing performance is good, smooth and reliable operation, the intermediate multi-point loading and unloading and safe operation, easy maintenance

 

Product Parameters

Model Diameter
(mm)		 Rated speed
(r/min)		 Reference capacity
(m³/h)		 Motor power
(Kw)		 Admission biggest gradient
(o)
LS114 114 84-130 0.1-1 2.2-18.5 ≤60
LS133 133 1-2
LS159 159 3-5
LS219 219 5-15
LS245 245 15-20
LS273 273 20-30
LS315 315 28-40
LS400 400 35-45
LS500 500 45-70
LS600 600 60-100

Applies:
Screw conveyor is widely used as a continuous conveyor in metallurgy, building materials, chemicals, machinery and food processing sectors .
Our product

Certifications

 

Packaging & Shipping

Packaging Details:The Packed in standard export wooden case packing.If you have special requirements, please just inform us.
Delivery time:the manufacturing time:7-10 working days after payment.

Company Profile

Our company is specialized in producing conveyor equipments, like screw conveyor, belt conveyor,Net Conveyor,chain conveyor, drag conveyor,trimmer conveyor,Roller Conveyor, roller conveyor,Seal conveyor,Etc.Length 3-30m ,width and height the conveying equipment for various industries can also be customized according to customer requirements .The products have been widely used in assembly ,packing producing line ,food,medicine,beverage and other industries requiring no pollution.In order to satisfy the masses of customers on the diversity of products demand, our company customizes machines that satisfied customers based on their actual needs.
If you have any idea about our product,PLS CONTACT US!

FAQ

Q:What is the real delivery time of your factory?

A: 7 to 10 working days for general series products, meanwhile, customized products would need 20 days to 40 days based on different situations.

Q: How do you ensure the quality of your products?
A: Generally, our equipments are the most durable type in the industry, this is also the feature of the label impression of DH for most of our customers at home or abroad.However, we do recognized that there do have small amount of the product which may got faulty or damaged for different reasons.

Q: How do your after-sale service work if the product got damaged?
A: In the gurantee time 12 months, our general aftersale serve.

Types of Screw Shafts

Screw shafts come in various types and sizes. These types include fully threaded, Lead, and Acme screws. Let’s explore these types in more detail. What type of screw shaft do you need? Which 1 is the best choice for your project? Here are some tips to choose the right screw:

Machined screw shaft

The screw shaft is a basic piece of machinery, but it can be further customized depending on the needs of the customer. Its features include high-precision threads and ridges. Machined screw shafts are generally manufactured using high-precision CNC machines or lathes. The types of screw shafts available vary in shape, size, and material. Different materials are suitable for different applications. This article will provide you with some examples of different types of screw shafts.
Ball screws are used for a variety of applications, including mounting machines, liquid crystal devices, measuring devices, and food and medical equipment. Various shapes are available, including miniature ball screws and nut brackets. They are also available without keyway. These components form a high-accuracy feed mechanism. Machined screw shafts are also available with various types of threaded ends for ease of assembly. The screw shaft is an integral part of linear motion systems.
When you need a machined screw shaft, you need to know the size of the threads. For smaller machine screws, you will need a mating part. For smaller screw sizes, the numbers will be denominated as industry Numeric Sizes. These denominations are not metric, but rather in mm, and they may not have a threads-per-inch designation. Similarly, larger machine screws will usually have threads that have a higher pitch than those with a lower pitch.
Another important feature of machine screws is that they have a thread on the entire shaft, unlike their normal counterparts. These machine screws have finer threads and are intended to be screwed into existing tapped holes using a nut. This means that these screws are generally stronger than other fasteners. They are usually used to hold together electronic components, industrial equipment, and engines. In addition to this, machine screws are usually made of a variety of materials.
screwshaft

Acme screw

An Acme screw is the most common type of threaded shaft available. It is available in a variety of materials including stainless steel and carbon steel. In many applications, it is used for large plates in crushing processes. ACME screws are self-locking and are ideal for applications requiring high clamping force and low friction. They also feature a variety of standard thread forms, including knurling and rolled worms.
Acme screws are available in a wide range of sizes, from 1/8″ to 6″. The diameter is measured from the outside of the screw to the bottom of the thread. The pitch is equal to the lead in a single start screw. The lead is equal to the pitch plus the number of starts. A screw of either type has a standard pitch and a lead. Acme screws are manufactured to be accurate and durable. They are also widely available in a wide range of materials and can be customized to fit your needs.
Another type of Acme screw is the ball screw. These have no back drive and are widely used in many applications. Aside from being lightweight, they are also able to move at faster speeds. A ball screw is similar to an Acme screw, but has a different shape. A ball screw is usually longer than an Acme screw. The ball screw is used for applications that require high linear speeds. An Acme screw is a common choice for many industries.
There are many factors that affect the speed and resolution of linear motion systems. For example, the nut position and the distance the screw travels can all affect the resolution. The total length of travel, the speed, and the duty cycle are all important. The lead size will affect the maximum linear speed and force output. If the screw is long, the greater the lead size, the higher the resolution. If the lead length is short, this may not be the most efficient option.
screwshaft

Lead screw

A lead screw is a threaded mechanical device. A lead screw consists of a cylindrical shaft, which includes a shallow thread portion and a tightly wound spring wire. This spring wire forms smooth, hard-spaced thread convolutions and provides wear-resistant engagement with the nut member. The wire’s leading and trailing ends are anchored to the shaft by means appropriate to the shaft’s composition. The screw is preferably made of stainless steel.
When selecting a lead screw, 1 should first determine its critical speed. The critical speed is the maximum rotations per minute based on the natural frequency of the screw. Excessive backlash will damage the lead screw. The maximum number of revolutions per minute depends on the screw’s minor diameter, length, assembly alignment, and end fixity. Ideally, the critical speed is 80% of its evaluated critical speed. A critical speed is not exceeded because excessive backlash would damage the lead screw and may be detrimental to the screw’s performance.
The PV curve defines the safe operating limits of a lead screw. This relationship describes the inverse relationship between contact surface pressure and sliding velocity. As the PV value increases, a lower rotation speed is required for heavier axial loads. Moreover, PV is affected by material and lubrication conditions. Besides, end fixity, which refers to the way the lead screw is supported, also affects its critical speed. Fixed-fixed and free end fixity are both possible.
Lead screws are widely used in industries and everyday appliances. In fact, they are used in robotics, lifting equipment, and industrial machinery. High-precision lead screws are widely used in the fields of engraving, fluid handling, data storage, and rapid prototyping. Moreover, they are also used in 3D printing and rapid prototyping. Lastly, lead screws are used in a wide range of applications, from measuring to assembly.

Fully threaded screw

A fully threaded screw shaft can be found in many applications. Threading is an important feature of screw systems and components. Screws with threaded shafts are often used to fix pieces of machinery together. Having fully threaded screw shafts ensures that screws can be installed without removing the nut or shaft. There are 2 major types of screw threads: coarse and fine. When it comes to coarse threads, UTS is the most common type, followed by BSP.
In the 1840s, a British engineer named Joseph Whitworth created a design that was widely used for screw threads. This design later became the British Standard Whitworth. This standard was used for screw threads in the United States during the 1840s and 1860s. But as screw threads evolved and international standards were established, this system remained largely unaltered. A new design proposed in 1864 by William Sellers improved upon Whitworth’s screw threads and simplified the pitch and surface finish.
Another reason for using fully threaded screws is their ability to reduce heat. When screw shafts are partially threaded, the bone grows up to the screw shaft and causes the cavity to be too narrow to remove it. Consequently, the screw is not capable of backing out. Therefore, fully threaded screws are the preferred choice for inter-fragmentary compression in children’s fractures. However, surgeons should know the potential complication when removing metalwork.
The full thread depth of a fully threaded screw is the distance at which a male thread can freely thread into the shaft. This dimension is typically 1 millimeter shy of the total depth of the drilled hole. This provides space for tap lead and chips. The full-thread depth also makes fully threaded screws ideal for axially-loaded connections. It is also suitable for retrofitting applications. For example, fully threaded screws are commonly used to connect 2 elements.
screwshaft

Ball screw

The basic static load rating of a ball screw is determined by the product of the maximum axial static load and the safety factor “s0”. This factor is determined by past experience in similar applications and should be selected according to the design requirements of the application. The basic static load rating is a good guideline for selecting a ball screw. There are several advantages to using a ball screw for a particular application. The following are some of the most common factors to consider when selecting a ball screw.
The critical speed limit of a ball screw is dependent on several factors. First of all, the critical speed depends on the mass, length and diameter of the shaft. Second, the deflection of the shaft and the type of end bearings determine the critical speed. Finally, the unsupported length is determined by the distance between the ball nut and end screw, which is also the distance between bearings. Generally, a ball screw with a diameter greater than 1.2 mm has a critical speed limit of 200 rpm.
The first step in manufacturing a high-quality ball screw is the choice of the right steel. While the steel used for manufacturing a ball screw has many advantages, its inherent quality is often compromised by microscopic inclusions. These microscopic inclusions may eventually lead to crack propagation, surface fatigue, and other problems. Fortunately, the technology used in steel production has advanced, making it possible to reduce the inclusion size to a minimum. However, higher-quality steels can be expensive. The best material for a ball screw is vacuum-degassed pure alloy steel.
The lead of a ball screw shaft is also an important factor to consider. The lead is the linear distance between the ball and the screw shaft. The lead can increase the amount of space between the balls and the screws. In turn, the lead increases the speed of a screw. If the lead of a ball screw is increased, it may increase its accuracy. If not, the lead of a ball screw can be improved through preloading, lubrication, and better mounting accuracy.

China Hot selling CZPT Fertilizer Flexible Carbon Steel Cement U Type Pellet Helical Worm Screw Conveyor Feeder Filling Machine with Hopper with Free Design CustomChina Hot selling CZPT Fertilizer Flexible Carbon Steel Cement U Type Pellet Helical Worm Screw Conveyor Feeder Filling Machine with Hopper with Free Design Custom

China factory Worm-Drive Clamps for Fuel Line with high quality

Product Description

              

Size

Band With

Band Thickness, mm

Carton

Pack. Size

mm

mm

W1

W2/W4

pcs

8-12

9/12

0.7/0.8

0.6

1000

10-16

9/12

0.7/0.8

0.6

1000

12-20

9/12

0.7/0.8

0.6

1000

16-25

9/12

0.7/0.8

0.6

1000

18-27

9/12

0.7/0.8

0.6

1000

20-32

9/12

0.7/0.8

0.6

1000

25-40

9/12

0.7/0.8

0.6

1000

32-50

9/12

0.7/0.8

0.6

1000

40-60

9/12

0.7/0.8

0.6

1000

50-70

9/12

0.7/0.8

0.6

1000

60-80

9/12

0.7/0.8

0.6

500

70-90

9/12

0.7/0.8

0.6

500

80-100

9/12

0.7/0.8

0.6

500

90-110

9/12

0.7/0.8

0.6

500

100-120

9/12

0.7/0.8

0.6

500

110-130

9/12

0.7/0.8

0.6

500

120-140

9/12

0.7/0.8

0.6

500

130-150

9/12

0.7/0.8

0.6

500

140-160

9/12

0.7/0.8

0.6

500

150-170

9/12

0.7/0.8

0.6

500

160-180

9/12

0.7/0.8

0.6

500

170-190

9/12

0.7/0.8

0.6

500

190-210

9/12

0.7/0.8

0.6

250

200-220

9/12

0.7/0.8

0.6

250

210-230

9/12

0.7/0.8

0.6

250

220-240

9/12

0.7/0.8

0.6

250

230-250

9/12

0.7/0.8

0.6

250

240-260

9/12

0.7/0.8

0.6

250

250-270

9/12

0.7/0.8

0.6

250

260-280

9/12

0.7/0.8

0.6

250

270-290

9/12

0.7/0.8

0.6

250

280-300

9/12

0.7/0.8

0.6

250

300-320

9/12

0.7/0.8

0.6

250

.
clapm is made from a 430 stainless steel band with a zinc plated T shaped bolt, while the T bush is made from an aluminum zinc alloy. The T-Bolt clips provide a uniform sealing pressure for a reliable seal with a narrow band width, suitable for high pressure applications with thick hoses, or turbo exhausting pipes,clapm is available in Grade W2. The Band and Bridge are made from 430 stainless steel and a zinc plated T Bolt screw

Types of Screw Shafts

Screw shafts come in various types and sizes. These types include fully threaded, Lead, and Acme screws. Let’s explore these types in more detail. What type of screw shaft do you need? Which 1 is the best choice for your project? Here are some tips to choose the right screw:

Machined screw shaft

The screw shaft is a basic piece of machinery, but it can be further customized depending on the needs of the customer. Its features include high-precision threads and ridges. Machined screw shafts are generally manufactured using high-precision CNC machines or lathes. The types of screw shafts available vary in shape, size, and material. Different materials are suitable for different applications. This article will provide you with some examples of different types of screw shafts.
Ball screws are used for a variety of applications, including mounting machines, liquid crystal devices, measuring devices, and food and medical equipment. Various shapes are available, including miniature ball screws and nut brackets. They are also available without keyway. These components form a high-accuracy feed mechanism. Machined screw shafts are also available with various types of threaded ends for ease of assembly. The screw shaft is an integral part of linear motion systems.
When you need a machined screw shaft, you need to know the size of the threads. For smaller machine screws, you will need a mating part. For smaller screw sizes, the numbers will be denominated as industry Numeric Sizes. These denominations are not metric, but rather in mm, and they may not have a threads-per-inch designation. Similarly, larger machine screws will usually have threads that have a higher pitch than those with a lower pitch.
Another important feature of machine screws is that they have a thread on the entire shaft, unlike their normal counterparts. These machine screws have finer threads and are intended to be screwed into existing tapped holes using a nut. This means that these screws are generally stronger than other fasteners. They are usually used to hold together electronic components, industrial equipment, and engines. In addition to this, machine screws are usually made of a variety of materials.
screwshaft

Acme screw

An Acme screw is the most common type of threaded shaft available. It is available in a variety of materials including stainless steel and carbon steel. In many applications, it is used for large plates in crushing processes. ACME screws are self-locking and are ideal for applications requiring high clamping force and low friction. They also feature a variety of standard thread forms, including knurling and rolled worms.
Acme screws are available in a wide range of sizes, from 1/8″ to 6″. The diameter is measured from the outside of the screw to the bottom of the thread. The pitch is equal to the lead in a single start screw. The lead is equal to the pitch plus the number of starts. A screw of either type has a standard pitch and a lead. Acme screws are manufactured to be accurate and durable. They are also widely available in a wide range of materials and can be customized to fit your needs.
Another type of Acme screw is the ball screw. These have no back drive and are widely used in many applications. Aside from being lightweight, they are also able to move at faster speeds. A ball screw is similar to an Acme screw, but has a different shape. A ball screw is usually longer than an Acme screw. The ball screw is used for applications that require high linear speeds. An Acme screw is a common choice for many industries.
There are many factors that affect the speed and resolution of linear motion systems. For example, the nut position and the distance the screw travels can all affect the resolution. The total length of travel, the speed, and the duty cycle are all important. The lead size will affect the maximum linear speed and force output. If the screw is long, the greater the lead size, the higher the resolution. If the lead length is short, this may not be the most efficient option.
screwshaft

Lead screw

A lead screw is a threaded mechanical device. A lead screw consists of a cylindrical shaft, which includes a shallow thread portion and a tightly wound spring wire. This spring wire forms smooth, hard-spaced thread convolutions and provides wear-resistant engagement with the nut member. The wire’s leading and trailing ends are anchored to the shaft by means appropriate to the shaft’s composition. The screw is preferably made of stainless steel.
When selecting a lead screw, 1 should first determine its critical speed. The critical speed is the maximum rotations per minute based on the natural frequency of the screw. Excessive backlash will damage the lead screw. The maximum number of revolutions per minute depends on the screw’s minor diameter, length, assembly alignment, and end fixity. Ideally, the critical speed is 80% of its evaluated critical speed. A critical speed is not exceeded because excessive backlash would damage the lead screw and may be detrimental to the screw’s performance.
The PV curve defines the safe operating limits of a lead screw. This relationship describes the inverse relationship between contact surface pressure and sliding velocity. As the PV value increases, a lower rotation speed is required for heavier axial loads. Moreover, PV is affected by material and lubrication conditions. Besides, end fixity, which refers to the way the lead screw is supported, also affects its critical speed. Fixed-fixed and free end fixity are both possible.
Lead screws are widely used in industries and everyday appliances. In fact, they are used in robotics, lifting equipment, and industrial machinery. High-precision lead screws are widely used in the fields of engraving, fluid handling, data storage, and rapid prototyping. Moreover, they are also used in 3D printing and rapid prototyping. Lastly, lead screws are used in a wide range of applications, from measuring to assembly.

Fully threaded screw

A fully threaded screw shaft can be found in many applications. Threading is an important feature of screw systems and components. Screws with threaded shafts are often used to fix pieces of machinery together. Having fully threaded screw shafts ensures that screws can be installed without removing the nut or shaft. There are 2 major types of screw threads: coarse and fine. When it comes to coarse threads, UTS is the most common type, followed by BSP.
In the 1840s, a British engineer named Joseph Whitworth created a design that was widely used for screw threads. This design later became the British Standard Whitworth. This standard was used for screw threads in the United States during the 1840s and 1860s. But as screw threads evolved and international standards were established, this system remained largely unaltered. A new design proposed in 1864 by William Sellers improved upon Whitworth’s screw threads and simplified the pitch and surface finish.
Another reason for using fully threaded screws is their ability to reduce heat. When screw shafts are partially threaded, the bone grows up to the screw shaft and causes the cavity to be too narrow to remove it. Consequently, the screw is not capable of backing out. Therefore, fully threaded screws are the preferred choice for inter-fragmentary compression in children’s fractures. However, surgeons should know the potential complication when removing metalwork.
The full thread depth of a fully threaded screw is the distance at which a male thread can freely thread into the shaft. This dimension is typically 1 millimeter shy of the total depth of the drilled hole. This provides space for tap lead and chips. The full-thread depth also makes fully threaded screws ideal for axially-loaded connections. It is also suitable for retrofitting applications. For example, fully threaded screws are commonly used to connect 2 elements.
screwshaft

Ball screw

The basic static load rating of a ball screw is determined by the product of the maximum axial static load and the safety factor “s0”. This factor is determined by past experience in similar applications and should be selected according to the design requirements of the application. The basic static load rating is a good guideline for selecting a ball screw. There are several advantages to using a ball screw for a particular application. The following are some of the most common factors to consider when selecting a ball screw.
The critical speed limit of a ball screw is dependent on several factors. First of all, the critical speed depends on the mass, length and diameter of the shaft. Second, the deflection of the shaft and the type of end bearings determine the critical speed. Finally, the unsupported length is determined by the distance between the ball nut and end screw, which is also the distance between bearings. Generally, a ball screw with a diameter greater than 1.2 mm has a critical speed limit of 200 rpm.
The first step in manufacturing a high-quality ball screw is the choice of the right steel. While the steel used for manufacturing a ball screw has many advantages, its inherent quality is often compromised by microscopic inclusions. These microscopic inclusions may eventually lead to crack propagation, surface fatigue, and other problems. Fortunately, the technology used in steel production has advanced, making it possible to reduce the inclusion size to a minimum. However, higher-quality steels can be expensive. The best material for a ball screw is vacuum-degassed pure alloy steel.
The lead of a ball screw shaft is also an important factor to consider. The lead is the linear distance between the ball and the screw shaft. The lead can increase the amount of space between the balls and the screws. In turn, the lead increases the speed of a screw. If the lead of a ball screw is increased, it may increase its accuracy. If not, the lead of a ball screw can be improved through preloading, lubrication, and better mounting accuracy.

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