Deep groove ball bearings are the most common rolling bearing. Its Single Row Deep Groove Ball Bearings：structure is simple and easy to use. Mainly used to take radial loads, but when you increase the radial clearance of bearings, angular contact ball bearings have a certain property, can accommodate combined radial and axial loads. When in high speed, the thrust ball bearings should not be used, can also be used to take pure axial loads. And sizes of deep groove ball bearing the same comparison of other types of bearings, the bearings low friction, high speed limit. But not impact resistance and should not be subjected to heavy load.