Deep groove ball bearing collar, a general by a group, a group of steel ball keep frame. Its simple structure, easy to use, is the most common, production the most widely used type of bearing. This type of bearings is mainly used in radial load, but also can withstand any amount of the axial load. When in a certain range, the increase of bearing clearance, the radial oil bearing has properties of Angle contact ball bearing, still can withstand the larger axial load. Deep groove ball bearings in shaft, can make the axis of the axial displacement of or restriction on bearing axial range. At the same time, when the housing holes and axis (or the outer circle) relative have internal tilt, (no more than 8 - 16, according to clearance) still can work normally. Since there exists, it will inevitably inclined lower bearing life.