~The function of linear guideway is to support and guide the moving parts, and make reciprocating linear motion in the given direction. According to the nature of friction, linear motion guideway can be divided into sliding friction guideway, rolling friction guideway, elastic friction guideway, fluid friction guideway, etc. Linear bearings are mainly used in automatic machinery, such as machine tools imported from Germany, bending machines, laser welding machines, etc., of course, linear bearings and linear shafts are matched. Linear guide rail is mainly used in mechanical structures with high precision requirements,