The first thing that gives LIN plastic linear bearings dust-resistance and a long service life is the use of EPB13 high-performance wear-resistant material, which can form a sliding film when used in linear bearings. From a structural design perspective, the bearings feature an axial beveled groove around their circumference; this allows dust to be quickly expelled from the friction surface when the bearings are operating, and also enables frictional heat to rapidly dissipate. Second-generation plastic linear bearings employ a beveled groove design to avoid blind zone in the contact surface between the bearing and shaft, which provides the shaft with even better protection. Furthermore, the reduced groove width in second-generation plastic linear bearings further enhances the bearings' load-bearing ability. Even more importantly, second-generation plastic linear bearings can be used to allow structures in the circumference direction to accompany rotation in the linear motion process; this allows LIN plastic linear bearings to be used in an even wider range of applications.