Oilless or low-oil-contained lubrication means less fuel without refueling, the goal of our research is to ensure that the bearing in such conditions can have good performance and extend its life as much as possible. When self-lubricating bearings are running, the solid lubricants on its surface form a lubricating film by mutual friction .It avoids direct contact between the workpiece and thus well protected against wear parts to extend the service life of the bearings and the workpiece.