This product bases on alloy of bronze of special formula.The solid lubricating medium is inlaid in the friction surface and the friction area of the solid lubricating medium take over 20%.The combination of advantages of alloy of bronze and non-metal Friction reducing mater has broken in the limit of general bearing that depend on oil film.It was widely used in metallurgy,steel rollers in metal-graph mineral machine,ships gas turbine and etc.