Automobile parts and assemblies that use F&D bearings include: engine, generator, water pump, clutch, transmission, differential, steering gear, air conditioner, etc. The main bearing type is small deep groove ball bearing, accounting for about 27% of the total automobile bearing consumption. The function of the engine is to center positioning, withstand pressure and gravity, make the axis parallel, wheelbase positioning, reduce friction, so that the engine in different speeds, different loads, different temperature can be safe, reliable and durable operation.