Deep groove ball bearings are the most representative of the rolling bearing, a wide range of uses. For high speed or high speed operation, but also very durable, without regular maintenance. Small coefficient of friction of such bearings, limit high-speed, simple structure, low manufacturing cost and easy to reach a higher manufacturing precision. Size of the scope and diverse forms, applications in precision instruments, low noise motors, automobiles, motorcycles and general machinery industries, mechanical industries are the most widely used one type of bearing. The main radial load to bear, it can withstand certain amount of axial load.