Deep groove ball bearings due to the different purposes and working conditions, there are many changes in its structure. But the basic structure is from the inner ring, outer ring, rolling elements (balls) and cage four parts.

First, the inner ring (also known as the inner sleeve or inner ring). Usually fixed to the journal, the inner ring rotates together with the shaft. Inner or outer surface for roller ball rolling grooves, called the groove or the inner race.

Second, the outer ring (also known as jacket or outer ring). Usually fixed to the bearing housing or machine casing, from the supporting role of balls rolling elements. On the outer surface of the circle there for ball or roller rolling grooves, called the groove or the inner race.

Third, the rolling elements (balls). Each groove ball bearings are equipped with a group or several groups of rolling elements disposed between the inner and outer rings, each passing from rolling forces. Rolling body is subjected to a load of parts, their shape, size and number determines the ability of the bearing load of each high speed performance.

Fourth, the holder (also known as the holder or isolator). The bearing rolling elements evenly spaced so that each rolling element rolling normally between inner and outer rings. In addition, the retainer having a guide rolling body movement, improve the bearing internal lubrication conditions, and to prevent rolling off the body and so on.

Thrust ball bearings, and the shaft with ferrule called shaft washer, and housing or machine casing box office with ferrule, shaft ring and seat ring gasket collectively. In addition to these four components, the various configurations of its bearings as well as other parts of the match. For example, rivets, shield, seal, washers, retaining rings and tight sets and the like.