Deep groove ball bearing is the most representative of rolling bearing, used widely. Suitable for high speed of operation, high speed even and 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, general machinery and other industries, most widely used in mechanical industry of a class of bearing. Main radial load, also can bear a certain amount of the axial load.