The doffing device of the spinning machine of the textile machinery adopts the scissor drive solution. The position of where the support guide slides was originally taking the metal ball linear bearings. However, the spinning machine is often stuck in the yarn wool environment, causing damage the guide rod easily and even the malfunction of entire equipment. Textile machinery design engineers chose LIN plastic linear bearings after trying various sliding bearings and finally solve the problems that have plagued them for many years. LIN bearings are made of EPB13 engineering plastic. It not only can be permanently lubricated, but also can run without any risk of stagnation. The working surface of the LIN bearings adopts the inclined groove design, which can not only remove foreign objects from the friction surface in time, but also allow the shafts rotating slightly while being axially moved.