Deep groove ball bearings are representative rolling bearings. Compared with other types of bearings of the same size, deep groove ball bearings have a small friction coefficient, high speed, simple structure, low manufacturing cost, high precision, no need for frequent maintenance, and a wide range of sizes and various forms. They are a widely used type of bearings. They mainly bear radial loads and can also bear certain axial loads. When they only bear radial loads, the contact angle is zero. Deep groove ball bearings are widely used in many industries such as Automotive Industry, Industrial Machinery, Household Appliances, Aerospace, Electric Motors, Agricultural Equipment, Medical Devices, Renewable Energy, Material Handling, Marine Applications, etc.