Bearings for alloys, bronze, aluminum-based alloys, zinc-based alloys, etc. are known as metal structural materials. Among them, bearing as well as alloy technology is also called white alloy, mainly lead, tin, antimony or some other metal alloy, it can be under heavy load, high speed, etc., the strength impact is small. The reason is mainly because of its characteristics, good wear resistance type, high plasticity, good running together performance, good thermal conductivity and good anti-gumming and good adsorption with oil. However, because it is more expensive, it must be poured on bronze, steel strip or cast iron shingles at the same time to form a thinner coating when it is used.