The precision planetary roller screw is a high-precison transmission component that convert rotary motion into linear motion, with the transmission elements being the rollers between the screw shaft and the nut.

The components of a planetary roller screw are screw shaft, one or more rollers, roller planet cage, nut, and limit spacer ring. Planetary roller screw has a small axial clearance and high transmission efficiency, and can achieve high-speed transmission with a tiny pitch to an ultra-large lead.

The precision planetary roller screw has been widely applied to the positioning accuracy control of various industries machinery, such as precision machine tools, industrial machinery, electronic machinery, tranport machinery, etc.