Deep groove ball bearings are the most representative rolling bearing，alou wide use in each industry. Used for high speed and extremely high speed of environment, it is very durable and does not require frequent maintenance. Deep groove ball bearings have low friction coefficient, high ultimate rotational speed, simple structure, low manufacturing cost, and are easy to achieve high manufacturing accuracy. The range of dimensions and structural type sdiverse changes, widely used in precision instruments, low noise motors, various types of automobiles, motorcycles, and common machinery,etc,industry. It is the most widely used type of bearing in the mechanical industry. Usually able to withstand radial loads and may also withstand a certain amount of axial loads.