Bearing Screws
Your Professional Bearing Screw Supplier
Zhejiang CNCD Transmission Equipment Co., Ltd. was established in 2010. With the production of high-end technology rolling functional components as the main field, the company extracts advanced foreign technical concepts, introduces a number of advanced domestic and foreign special equipment, and specializes in the production of linear guides, micro linear guides, thin air grippers and other products. The linear guides produced by our company have the characteristics of heavy load, high precision, low noise, and environmental protection. The products are widely used in various fields such as automation equipment, machine tools, printing, food, and pharmaceuticals.
Why choose us
Our Certificates
Our products have certificates such as CE,ISO9001.
Our Equipment
Our Company introduces a number of advanced domestic and foreign special equipment, and specializes in the production of linear guides, micro linear guides, thin air grippers and other products.
Our Service
Integrated service should achieve seamless connection between pre-sales, in-sales and after-sales services so that customers can feel the continuity of services throughout the purchase cycle.
Ball Screw
A ball screw (or ballscrew) is a mechanical linear actuator that translates rotational motion to linear motion with little friction. A threaded shaft provides a helical raceway for ball bearings which act as a precision screw. As well as being able to apply or withstand high thrust loads, they can do so with minimum internal friction. They are made to close tolerances and are therefore suitable for high-precision applications. The ball assembly acts as the nut while the threaded shaft is the screw.
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Product name |
Ball Screw |
|
Model |
Custom |
|
Dia |
10,12 14 16 20 25 32 40 50 63 80 100 120mm |
|
Lead |
1,2,2,5,4 5 6 8 10 12 20 30 40mm |
|
Accuracy |
C7(0.05/300mm),C5(0.018/300mm),C3(0.008/300mm) |
|
Nut style |
Single or double |
|
Precompression |
3%,8%or as needed |
|
Bear |
The maximum capacity is 370 tons |
|
Material |
GCR15,440C,S55C |
Ball Screw Advantages
To make them suitable for the applications they are selected for, ball screws have the following advantages;
Highly efficient
They require less torque and are smaller than any alternative device.
01
Highly accurate
This means they can offer high positional accuracy as well as repeatability which is desirable for most applications.
02
Low friction
This enables them to function at a lower temperature than other options.
03
Adjustments
They can be adjusted so the preload can be increased or decreased.
04
Long life
The need to replace is lower compared to other alternatives.
05
Types of Ball Screws
Precision Ball Screw - Provides excellent positioning accuracy, low friction and high efficiency, suitable for high-demand CNC machine tools and other precision equipment.
High Load Ball Screw - It has high load capacity and good rigidity, and can cope with the needs of large mechanical systems.
Rolled Ball Screw - Suitable for general applications requiring lower accuracy and more economical cost.
Ground Ball Screw - Provides excellent positioning accuracy, suitable for applications requiring extremely high accuracy.
Support Unit Ball Screw - Provides stable support when bearing large loads, suitable for some heavy machine tools and systems with high rigidity requirements.
Miniature Ball Screw - Small size and lightweight design, suitable for applications with limited space.
Double Nut Ball Screw - Better resistance to vibration and increased system rigidity.Applications requiring higher rigidity and load capacity, such as high-speed machine tools.
Ball screws are used in a wide variety of industrial and high-tech applications. Some common examples include:
Machine tools: Ball screws are used to provide the precise linear motion required in lathes, milling machines, and other CNC machines.
Robotics: Ball screws are used in many robotic applications, including robotic arms and legs.
Aerospace systems: Ball screws are used in aircraft control systems and other aerospace applications.
Medical equipment: Ball screws are used in many medical devices, including surgical robots and imaging systems.
Automotive industry: Ball screws are used in automotive manufacturing, including assembly lines and robotic welding systems.
Ball screw components
A ball screw is composed of several elements, including:
Threaded shaft
The threaded shaft is the core component of the ball screw. It is made of high-strength steel and has a precise thread profile that the ball bearings move along.
01
Nut
The nut is the housing for the ball bearings. It is typically made of steel and is designed to minimize friction between the ball bearings and the threaded shaft.
02
Ball bearings
The ball bearings are what enable the nut to move along the threaded shaft. They are typically made of steel or ceramic and are designed to minimize friction and wear.
03
End supports
The end supports are used to hold the ball screw in place and support the load. They are typically made of cast iron or steel and are designed to minimize deflection and vibration.
04
How Ball Screws Work
A ball screw works in a similar way to a conventional lead screw, but the significant advantage of using a ball screw is that it uses ball bearings running in the helical channel to transmit the load. In high precision applications it is often necessary to translate the rotary motion from a motor to linear motion for the payload. One way of achieving this is by using a ball screw.
Ball bearings within a ball screw roll along the track in a similar way to ball bearings in a standard rotary ball race, therefore eliminating the sliding friction associated with lead screws. The ball bearings are continually recirculated through the ball nut, distributing the load and picking up lubrication along the way. Due to the use of rolling ball bearings within a ball screw, the internal friction is very low, meaning ball screws can offer a high level of efficiency and positional accuracy even at high torque and force loadings.
Ball screws can be quite complicated and high-precision devices, meaning they can sometimes be slightly more costly compared to a typical lead screw. This is due to the complex machining and assembly techniques required to manufacture them. However, if your application requires a ball screw, the greater performance generally outweighs the cost.
HOW TO SELECT A BALL SCREW
Choosing the right ball screw for an industrial application involves several critical factors. Here's a checklist to guide the selection process:
Load Requirements - Calculate the axial and radial loads the ball screw will encounter. Choose a model rated for the maximum dynamic and static loads with an appropriate safety factor.
Travel Length - Determine the stroke distance needed. Ball screws can be custom-cut or specified in standard lengths. Consider deflection for longer screws to avoid whip.
Speed and Acceleration - High-speed applications require higher lead values and properly rated bearings to reduce inertia. Check the critical speed of the screw to avoid vibration.
Accuracy Class - Ball screws are available in different precision grades (e.g., C7, C5, C3). Applications like CNC or semiconductor systems may require C5 or C3 for fine motion control.
Environment - Consider exposure to dust, moisture, temperature extremes, or corrosive chemicals. Stainless steel and protective covers may be necessary.
Preload Needs - Zero-backlash or high-precision applications benefit from preloaded nuts, which increase stiffness but may add cost and friction.
Mounting and Support - Ensure the screw matches your machine's support system (e.g., fixed–fixed, fixed–floating) and that end machining aligns with your bearing blocks.
Budget and Availability - Finally, balance cost with performance. For example, rolled ball screws are more affordable and suitable for general automation, while ground screws are best for high-precision tasks.
Maintenance Tips for Ball Screws
While ball screws are durable, proper maintenance can extend their life even further:
Our Certifications
Official certification, professional after sales service.
FAQ
We are one of the most professional bearing screws manufacturers and suppliers in China, featured by quality products and good price. Please feel free to buy bearing screws in stock here from our factory. We also accept customized orders.