With the continuous development of China's numerical control equipment industry, the demand for various rolling functional components is becoming more and more diversified, especially: it is the application field of numerical control transmission, with the traditional scrolling functions such as ball screw pair and rolling linear guide pair. Parts are gradually recognized by users and the range of applications is expanding. However, for some applications where both linear motion and torque transmission are required, most of them still use traditional rectangular spline or involute spline coupling. Such transmissions often have frictional resistance