Ball screw bearing is a kind of bearing composed of screw, nut, reversing device and ball used to convert rotary motion into linear motion or convert linear motion into rotary motion.
The ball screw pair has the characteristics of high precision, reversibility and high efficiency. This is a further extension and development of the trapezoidal screw. The important significance of this development is to turn the sliding action of the trapezoidal screw into a rolling action. Because of its small friction resistance, ball screw bearings are widely used in various industrial equipment and precision instruments