A single angular contact ball bearing can bear thrust load only from a certain direction, so that it is usually combined to use with another angular contact ball bearing to balance thrust load, and its operating clearance or pre-load should be adjusted depend on requirement in installation. To avoid adjustment a category of special duplex bearing can be provide.

Rolling body is the ball, but diffrernt from the deep groove ball bearing, the outer is different, and the inner between the ball and the outer is different too.

It's can bear lateral load and longitudinal load eather, and reduce friction.