Deep groove ball bearings are the most commonly used rolling bearings. When using deep groove ball bearings, the structure of the motor bearing support system is very simple, and the maintenance is also convenient. Deep groove ball bearings are mainly used to bear radial loads, but when the radial clearance of the bearings is increased, they have the characteristics of angular contact ball bearings and can bear combined radial and axial loads; thrust balls are not suitable for high speeds When used as a bearing, it can also be used to bear pure axial load. Compared with other types of bearings with the same specifications and dimensions as deep groove ball bearings, this type of bearing has the advantages of small friction coefficient and high limit speed, but the disadvantage is that it is not resistant to impact and is not suitable for heavy loads.