Single row angular contact ball bearings can withstand axial load in one direction , while the radial load , will cause additional axial force. And only limited axial displacement in one direction or housing . Angular contact ball bearings contact angle of 40 degrees , it can withstand large axial load. Angular contact ball bearings are non- separable design, the shoulder on both sides of the inner and outer rings uneven . In order to improve the load bearing capacity ,