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Characteristics Of Ball Screw Bearings
Nov 20, 2018

Ball screw bearings are ideal products that convert rotary motion into linear motion or linear motion into rotary motion. Ball screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion, or to convert torque into axial repetitive force. It also has the characteristics of high accuracy, reversibility and high efficiency.


Ball screw bearings are widely used in various industrial equipment and precision instruments because of their small friction resistance.

The ball screw bearing consists of screw, nut, steel ball, pre pressing plate, reverser and dustproof device. Its function is to transform rotational motion into linear motion, which is the further extension and development of Eckham screw. The important significance of this development is to change the bearing from sliding motion to rolling motion.

Ball screw bearings have the characteristics of high accuracy, reversibility and high efficiency. This is the further extension and development of trapezoidal screw. The important significance of this development is to change the sliding action of trapezoidal screw into rolling action. Ball screw bearings are widely used in various industrial equipment and precision instruments because of their small friction resistance.

Features of ball screw bearings:


1, low friction loss and high transmission efficiency.

Because there are many balls rolling between the screw shaft and the screw nut of the ball screw bearing, it can get a higher movement efficiency. Compared with the previous sliding screw pairs, the driving moment is less than 1/3, that is to say, the power required to achieve the same results is 1/3 of the power required to use the sliding screw pairs. It is very helpful in saving electricity.

2. High accuracy.

Ball screw pairs are generally produced with the highest level of mechanical equipment in the world. Especially in the aspects of grinding, assembling and inspecting the factory environment of each process, temperature and humidity are strictly controlled. Because of the perfect quality management system, accuracy is fully guaranteed.

3. High speed feed and micro feed.

Because ball screw bearings use ball motion, the starting moment is very small, and there will be no creeping phenomenon like sliding motion, which can ensure accurate micro-feed.

4. High axial stiffness.

Ball screw bearings can be pressurized and pre-pressed, because pre-pressure can make the axial clearance reach a negative value, and then get a higher rigidity (ball screw by adding pressure to the ball, in the actual use of mechanical devices, etc., because of the repulsion of the ball can make the rigidity of the mother part increased).

5. It can not self lock and has the reversibility of transmission.