Ball Screw

Ball Screw

Ball screws are known for their ability to effectively convert rotary motion into linear motion and vice versa. They are widely used in tool machinery and precision machinery, making them a popular choice in the industry.

Ball screws are characterized by their high precision, reversibility, and efficiency, and they are particularly valued for their low friction resistance. This makes them suitable for use in a variety of industrial equipment and precision instruments.

The ball screw is comprised of several components, including the screw, nut, steel balls, pre-compression piece, inverter, and dustproof device. These components work together to achieve the conversion of rotary motion into linear motion.

The ball screw is an extension and development of the Aikem screw, with the significant difference being the change from sliding motion to rolling motion in the bearings. This change has led to improved performance and efficiency in the use of ball screws.

Working principle

The ball screw, which has largely replaced the trapezoidal screw commonly known as the screw, is utilized for converting rotary motion into linear motion or vice versa.

It boasts high transmission efficiency and precise positioning.

When employed as the active component, the ball screw drives the nut to produce linear motion based on the lead angle of the screw and the rotation angle of the screw.

The passive component can be connected to the nut and nut seat to achieve the desired linear motion.


1. Low friction loss and high transmission efficiency

The ball screw pair features a high movement efficiency due to the presence of numerous balls between the screw shaft and screw nut, which facilitate rolling motion.

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Compared to traditional sliding screw pairs, the ball screw pair requires less driving torque, specifically, less than one-third, resulting in a significant reduction in power consumption for the same motion outcome.

This design greatly contributes to energy savings.

2. High precision

Ball screw pairs are manufactured using the world’s most advanced mechanical equipment to ensure consistency.

In the factory, temperature and humidity are carefully controlled during the grinding, assembly, and inspection processes to maintain the highest level of quality.

The company’s comprehensive quality management system ensures that the accuracy of the ball screw pairs is fully guaranteed.

3. High-speed feed and micro-feeds possible

The ball screw pair utilizes ball movement, resulting in a very low starting torque and eliminating creep such as sliding motion. This ensures accurate micro-feeding.

4. High axial stiffness

The ball screw pair can be preloaded, which results in a higher rigidity due to the axial gap reaching a negative value. The balls pressurize the inner side of the ball screws, leading to an increase in rigidity from the repulsive force of the balls when used in a mechanical device.

5. Can not be self-locking, with the reversibility of the transmission

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