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1.Ball screw is rotary motion into linear motion, or linear motion into rotary motion of the desired product. 2.Ball screw by the screw, nut and ball composition. Its function is to convert rotary motion linear motion, ball screw which is a further extension and development, the significance of this development is to move into a sliding bearing from the rolling action. With little friction, ball screws are widely used in various industrial equipment and precision instruments. 3.Machine tools and precision ball screw is the most commonly used mechanical transmission components, its main function is to convert the rotary motion linear motion or torque into axial force over and over again, while both high-precision, reversible and high efficiency characteristics Feature