Tag Archives: shaft roller

China manufacturer Return Roller with Threaded Shaft for Conveyor wholesaler

Product Description

Conveyor roller Steel roller for Belt conveyor

CONVEYOR ROLLER
Conveyor roller is an important component, types and large quantities. It accounts for the total cost of a conveyor 35%, to withstand more than 70% of the resistance, so the quality of roller is particularly important. 
Our roller has Minimal rtating inertia, reasonable structure, reliable tightness, flexible rotating, simple dismounting, easy maintained, long operational life, etc. Also we can do as customer request.

1.Type:
Carrying, return

2.Conveyor type:
DTII DTII(A) TD75

3.Application:
Used in coal mine, power plant, cement plant, port and so on

4.Details:
Pipe Material : Q235 carbon steel
Pipe  Diameter : 60-219mm
Pipe Length:  150mm ~ 3500 mm
 

Shaft Material : A3 / 45# steel 

Shaft Diameter:  20 25 mm

Shaft end type:DTII TD75 flat

Bearing:6204,6205,6305,6306,6307
Bearing brand: ZWZ HRB SKF NSK

Welding:Automatic double end weld bearing housing

Surface:Electric static spraying painting

Color:Any color as reuqest

5.Specification:
 

Standard Diameter Length Scope(mm) Bearings Type(Min-Max) Shell Wall Thickness
mm Inch
63.5 2 1/2 150-3500 6204 2.0mm-3.75mm
76 3 150-3500 6204 205 2.0mm-4.0mm
89 3 1/3 150-3500 6204 205 2.0mm-4.0mm
102 4 150-3500 6204 205 305 2.5mm-4.0mm
108 4 1/4 150-3500 6204 205 305 306 2.5mm-4.0mm
114 4 1/2 150-3500 6205 206 305 306 2.5mm-4.5mm
127 5 150-3500 6204 205 305 306 2.5mm-4.5mm
133 5 1/4 150-3500 6205 206 207 305 306 2.5mm-4.5mm
140 5 1/2 150-3500 6205 206 207 305 306 3.5mm-4.5mm
152 6 150-3500 6205 206 207 305 306 307 308 3.0mm-4.5mm
159 6 1/4 150-3500 6205 206 207 305 306 307 308 3.0mm-4.5mm
165 6 1/2 150-3500 6207 305 306 307 308 3.5mm-6.0mm
177.8 7 150-3500 6207 306 35718 309 3.5mm-6.0mm
190.7 7 1/2 150-3500 6207 306 35718 309 4.0mm-6.0mm
194 7 5/8 150-3500 6207 307 308 309 310 4.0mm-6.0mm
219 8 5/8 150-3500 6308 309 310 4.0mm-6.0mm
 

6.Workshop:

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 manufacturer Return Roller with Threaded Shaft for Conveyor   wholesaler China manufacturer Return Roller with Threaded Shaft for Conveyor   wholesaler

China supplier Return Roller with Threaded Shaft with Free Design Custom

Product Description

CONVEYOR ROLLER
Conveyor roller is an important component, types and large quantities. It accounts for the total cost of a conveyor 35%, to withstand more than 70% of the resistance, so the quality of roller is particularly important. 
Our roller has Minimal rtating inertia, reasonable structure, reliable tightness, flexible rotating, simple dismounting, easy maintained, long operational life, etc. Also we can do as customer request.

1.Type:
Carrying, return

2.Conveyor type:
DTII DTII(A) TD75

3.Application:
Used in coal mine, power plant, cement plant, port and so on

4.Details:
Pipe Material : Q235 carbon steel
Pipe  Diameter : 60-219mm
Pipe Length:  150mm ~ 3500 mm
 

Shaft Material : A3 / 45# steel 

Shaft Diameter:  20 25 mm

Shaft end type:DTII TD75 flat

Bearing:6204,6205,6305,6306,6307
Bearing brand: ZWZ HRB SKF NSK

Welding:Automatic double end weld bearing housing

Surface:Electric static spraying painting

Color:Any color as reuqest

5.Specification:
 

Standard Diameter Length Scope(mm) Bearings Type(Min-Max) Shell Wall Thickness
mm Inch
63.5 2 1/2 150-3500 6204 2.0mm-3.75mm
76 3 150-3500 6204 205 2.0mm-4.0mm
89 3 1/3 150-3500 6204 205 2.0mm-4.0mm
102 4 150-3500 6204 205 305 2.5mm-4.0mm
108 4 1/4 150-3500 6204 205 305 306 2.5mm-4.0mm
114 4 1/2 150-3500 6205 206 305 306 2.5mm-4.5mm
127 5 150-3500 6204 205 305 306 2.5mm-4.5mm
133 5 1/4 150-3500 6205 206 207 305 306 2.5mm-4.5mm
140 5 1/2 150-3500 6205 206 207 305 306 3.5mm-4.5mm
152 6 150-3500 6205 206 207 305 306 307 308 3.0mm-4.5mm
159 6 1/4 150-3500 6205 206 207 305 306 307 308 3.0mm-4.5mm
165 6 1/2 150-3500 6207 305 306 307 308 3.5mm-6.0mm
177.8 7 150-3500 6207 306 35718 309 3.5mm-6.0mm
190.7 7 1/2 150-3500 6207 306 35718 309 4.0mm-6.0mm
194 7 5/8 150-3500 6207 307 308 309 310 4.0mm-6.0mm
219 8 5/8 150-3500 6308 309 310 4.0mm-6.0mm
 

6.Workshop:

 

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.

China supplier Return Roller with Threaded Shaft   with Free Design CustomChina supplier Return Roller with Threaded Shaft   with Free Design Custom

China factory 60mm Diameter Steel CZPT Roller with Threaded Shaft Ends near me supplier

Product Description

MYC Roller Introduction
* Roller is an important part of the belt conveyor. There are many types of rollers such as carrier roller, impact roller, RDRT roller, return roller and so on. The function of roller is to support the belt, reduce the running resistance of the belt and make the verticality of the belt not exceed a certain limit to ensure the smooth running of the belt.
* Roller accounts for 35% of the total cost of a belt conveyor system and generates more than 70% resistance, so the quality of roller is particularly important.
* CZPT roller adopts self-developed double labyrinth seal structure, which is better than traditional seal structure in waterproof and dustproof effect. Roller pipe adopts high-frequency welding pipe special for rollers, shaft adopts cold drawn bright shaft special for rollers, and bearing housing is made by stamping, drawing and welding with mixed gas. After the roller is welded, both ends are chamfered and polished, and then polish and remove the rust of the pipe surface. The roller surface adopts outdoor powder coating, heating and curing. The roller adopts a double-head pressing machine to press the bearing and the seal in 3 times, so as not to damage the seal and protect the bearing. The shaft end is subjected to the final anti-rust treatment, and finally put into the export-specific crates.
* The CZPT series of rollers have a wide range of products, including steel rollers, impact rollers, RDRT rollers, rubber-coated rollers, self-aligning rollers, oil injection rollers, galvanized rollers and other types. The size specifications can be customized according to the customer’s drawings, also can be produced according to the standards of various countries. For detailed specifications, you can ask us for a product manual.
* At present, CZPT has the most advanced fully automatic production line for rollers in the industry. The entire production process uses robots instead of manual processing and production. Currently we have 2 automatic production lines and 2 semi-automatic production lines, which can achieve a daily output of 2000 rollers. For roller frames, we use a fully automatic laser cutting machine to cut the material, and use a CNC bending machine to produce the parts of the frame. Welding adopts a robot. Surface treatment is shot blasting and hot-galvanizing in accordance with international standards.
MYC Roller Specifications
No. Item Description
1 Brand MYC
2 Roller Diameter 60/63.5/76/89/102/108/114/127/133/140/152/159/178/194/219mm
3 Shell Thickness 3/3.5/4/4.5/5/5.5/6mm
4 Face Length 100mm-4000mm
5 Shaft Diameter 20/25/30/35/40/45/50mm
6 Bearing 6204/6205/6305/6206/6306/6307/6308/6309/6310
7 Bearing Type ZZ C3 / ZRS C3
8 Bearing Brand LYC/SKF/FAG/NSK
9 Seal MY/TK/TKII/TKIII/TF/AR/RG/RD
10 Pipe Material Carbon Steel Q235
11 Shaft Material Cold Drawing Round Steel
12 Surface Treatment Powder Coating/Galvanizing
13 Surface Color Customized

Production Process

MYC Production Equipment and Capacity
* We have an automated CNC production line designed and manufactured by ourselves. The production line contains the following unique core patented equipment:
Fully automatic extrusion equipment
Fully automatic injection molding equipment
Two-way CNC plastic roll lathe
Two-way milling machine with flat slot
CNC Pipe cutting machine for plastic pipe
* Our automatic production single line processes 50,000 rollers per month and we also have the ability to expand production capacity.
* Our CNC automatic processing equipment can fully guarantee the processing accuracy and quality of the products.
MYC Roller Advantages
* Choose the raw material with the very best quality from the market.
* Use the most advanced automation equipment for production.
* Long-life span, high quality and energy-saving products.
* Over 15 years experience of design, innovation, maintainence and production.
* Certified by ISO 9001, ISO 14001, ISO 45001, SGS, BV and other authorized certifications.
* Good reputation from the customers all over the world with longtime cooperation.

Comparison of Properties of Rollers of Different Materials
No. Item HDPE Roller Steel Roller Ceramic Roller
1 Chemical resistance (strong acid, strong alkali) Yes No Yes
2 Toughness (subject to greater external force) Unbreakable Unbreakable Fragile
3 Bearing Tightness Superior General Poor
4 Surface Adhesion Difficult Easy Easy
5 Coefficient of Sliding Friction (to belt) Small 0.10-0.15 Big 0.68-0.80 Big 0.68-0.80
6 Abrasive Resistance Good General Good
7 Wear on the belt Wearproof Easy to wear Easy to wear
8 Running Power Consumption (take steel roller as 1) 0.85 1 1.05
9 Noise and Vibration Low High Higher
10 Weight 5 10 15
11 Installation Maintenance Easy to install and maintenance-free Heavy installation and maintenance workload Heavy installation and maintenance workload
12 Water Absorption Small Big Big
13 Service Life 3-5 years 1-2 years 1-2 years

Products Overview

    Roller is divided into carrier roller, impact roller, return roller, RDRT roller, CZPT roller, rubber lagged roller and so on.
    As per the material used, there’re steel roller and plastic roller. Normally plastic roller is divided into HDPE roller, UMHWPE roller and nylon roller.

With good quality and high output, CZPT roller is exported to countries all around the world.

Belt Conveyor System Overview
 

Belt Conveyor Introduction
* The belt conveyor mainly consists of frame, roller, belt, pulley, tensioner and transmission part. Frame is made of steel. The core of the belt is made of cotton or nylon.
*Belt conveyor is widely used in industries of mine, metallurgy, coal, power plant, cement and so on to convey loose materials and finished products.
* According to the requirement of conveying process, it can be used as a stand-alone machine or used with other conveying equipments.
Features and Advantages
* Made of seamless link-belt, effectively improve the transport job stability.
* Big transportation capacity, simple structure.
* Easy maintenance, standardization of each part.
* Big selection range, can be matched and assembled as per actual condition.

Technical Specification          
Capacity
(m3/h)
        
Speed (m/s) Power (kw)
BW
(mm)
1.0 1.25 1.6 2.0 ≤12m 12-20m 20-30m
500 40 50 60 70 3-4 5.5-7.5 7.5-11
650 75 90 110 130 4 5.5-7.5 7.5-11
800 120 150 180 220 4-5.5 5.5-11 11-15
1000 180 220 280 350 5.5-7.5 7.5-11 11-18.5
1200 250 300 360 430 7.5-11 11-15 15-22
1400 300 380 480 600 11-15 15-22 22-30

Company Overview

    ZheJiang CZPT Conveyor Co., Ltd, located in the Eurasian bridgehead – HangZhou City Juxian Economic Development Zone, the company occupies more than 300 acres with a production workshop of 13 million square meters. Our company is close to HangZhou Port, HangZhou Port, HangZhou Airport and HangZhou Airport with high-speed around and convenient transportation, providing convenient services for customers with superior geographical advantages.

    Established in 2008, our company is a scientific and technological innovation-oriented enterprise with more than 10 R & D staff and more than 30 technical staff. Our company has independently studied and obtained more than 100 invention patents so far.

    Our company is committed to long distance, large capacity, space turning belt conveyor research and development and manufacturing, the roller, bracket, pulley and steel structure we produced have won praise of domestic and foreign customers. Our current customers are throughout Australia, Canada, the United States, Turkey, Saudi Arabia, Chile, Japan, South Korea, the Netherlands, France, Southeast Asia and other countries and regions.

    Our company attaches great importance to quality control, with high reliability for the design principle, from the source of the product to control the quality, uses advanced technology and equipment. Our company has obtained the “ISO9001: 2008 quality system certification”, “LEVEL III steel structure engineering and mechanical and electrical equipment installation”, “ISO14001: 2015 environmental system certification”, “ISO45001: 2018 CZPT system certification” and ” Production License of dangerous goods packaging and containers”.

     Adhere to the production of first-class products, provide first-class service, adhere to first-class management and create first-class enterprise, our company sincerely looks forward to working with all customers for sincere cooperation and a better future!

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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