Sliding bearings are the most widely used and the first class of bearings in the industry. Friction and wear are the main causes of failure of sliding bearings. In order to reduce the friction coefficient between the friction pairs and reduce the wear rate, methods such as grease lubrication and solid lubrication have been adopted. However, this type of bearing manufacturing process is more complicated and costly, which limits its widespread application in industry. Filled with polytetrafluoroethylene (F4) soft belt