Deep Groove Ball Bearing is the most representative structure in rolling bearing and has a wide range of applications. In addition to bearing radial load, it can also bear axial load in two directions. Small friction torque, most suitable for applications requiring high-speed rotation, low noise and low vibration. In addition to the open type, this bearing also has a bearing with a steel plate dust cover, a bearing with a rubber sealing ring, or a bearing with a stop ring on the outer diameter of the outer ring. Generally, a steel plate stamping cage is used. For deep groove ball bearings, a copper alloy cage is used for large-size bearings. When it is used for high-speed rotation, the car-made cage is also used.