Deep groove ball bearings are the most representative bearing,widely used bearing.For high speed or high speed operation,and is very durable,without regular maintenance.The kind of bearing friction,high limiting speed,simple structure,low cost,easy to achieve high manufacturing precision.Size range and diverse, used in precision instruments,low noise motors,automobiles,motorcylesand general machinery industries,the machinery industry,one of the most widely used class of bearing.The main radialload,but also can withstand a certain amount of axial load.