... used with gear rack, wheel rack together.As a part of transmission, it widely used on cnc machinery, Numerical control machine and ... some relating partsball screwlinear guide rail , bearings, couplings, support unit of ball screw, screw nuts , sealsIf you have any questions , please ... to give you a good answer!Our Jinan Lanhai Machinery Transmission Co., LTd . has 12 years expert experience in this ...