Polyoxymethylene (POM) is a kind of engineering plastics with excellent performance, POM has the hardness, strength and steeliness similar to metal, it has good self-lubrication, good fatigue resistance and rich in elasticity in a wide range of temperatures and humidity, in addition, it also has good resistance to chemicals, POM is replacing some markets traditionally occupied by metal at a cost lower than many other engineering plastics, for example, replacing zinc, brass, aluminium and steel to make many parts. Replacing zinc, brass, aluminium and steel in the production of many parts. Since its inception,
   POM has been widely used in electrical and electronic, machinery, instrumentation, daily light industry, automotive, building materials, agriculture and other fields. When used as bearings, it has been found to work better with nylon than alone.