Deep groove ball bearing is the most representative rolling bearing, used widely. Suitable for high speed even run, but the rotational speed of high very durable, need not often maintenance. These bearings are small friction coefficient, extreme high speed, simple structure, low cost, easy to manufacture high manufacturing precision. Size range and variety, application form in precision instruments, low noise machine, automobile, motorcycle and general machinery industries, is the most widely used in mechanical industry a kind of bearings. Main radial load, also can bear a certain amount of axial load.