We offer ball screw is made of screw, nut and ball. It's function is to turn the rotary motion into liner motion, which is a further extension and development of ball screw. The significance of this development is to move into a rolling bearing from slidingaction. With little friction, ball screws are widely used in various industrial equipment and precision instruments.Applications:1. Engraving machines;2. High speed cnc machinery;3.semi-conductor equipment;4. Auto-machinery.