Self-lubricating bearings. At home and abroad with its unique performance and economical efficiency in a wide range of use. The copper substrate with high strength and high hardness of copper alloy, than ordinary copper set of hardness, strength increased more than twice. The copper surface borehole inlaid graphite as the main set of oily solid lubricant, lubrication area accounts for about 25%, bearing the runtime itself to produce a layer of solid - liquid mixed lubrication membrane, reduce the effect of friction, greatly improved the performance copper set itself. Can be in heavy load, high temperature, impact load, reciprocating motion, the water, bad working conditions, such hard to come on to the normal work. And ordinary copper ring wear speed up by oil film failure can't even use. This product has a history of nearly ten years, has been widely used in the industries. With the understanding of the product range will be more and more big, will have a good benefit to society.