Angular contact ball bearings can stand the combined (radial and axial) load at the same time. it can also support the load from the complete axial direction.The quantity of the steel balls is more than the deeper groove ball Bearing’s. So the loading capability is better. The rigidity can be adjusted in advance. Craftwork is excellent .the class of tolerance is the one of the best types. Angular contact ball bearings satisfy the requirement for high rotate speed and super precision. Angular contact ball bearings is classified that single row, double row and paired-match. The angle of the angular contact ball bearing is 15 °、 25 °、 40 ° .The contact angle is bigger, along with that the load capability is much stronger.