Structure of the Guide
The linear guide largely comprises three components: a mobile carriage, a rail that supports the movements of the carriage, and balls. Linear motion is enabled by attaching a mechanism for recirculating the balls.
developed the linear Guide
The ball spline was developed to overcome these challenges, featuring arc-shaped raceways ground into the shaft and nut. This changed the point contact between the balls and raceways into surface contact, which enables the ball spline to bear larger loads than the ball bushing. In addition, because the balls are contained between the raceway surfaces on the shaft and the nut, the nut is prevented from rotating on the shaft. This meant only one shaft was needed to guide linear motion, and it could transmit torque.