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In fact, the history of people using screw for transmission is not very long. The traditional screw has been in poor positioning and easy to damage. Until 1898, people first tried to put steel balls between nuts and screws and replace sliding friction with rolling friction to improve its poor positioning and easy damage. In 1940, the ball screw was placed on the automobile steering gear, which was a great revolution in the application of ball screw, and gradually replaced the traditional acme screw (ACME). Until recent years, ball screw has become one of the most widely used components in the industry