Angular contact ball bearings can withstand both radial and axial loads simultaneously. Capable of operating at higher speeds. The larger the contact angle, the higher the axial bearing capacity. The contact angle is the angle between the contact point line between the ball and raceway in the radial plane and the vertical line of the bearing axis. High precision and high-speed bearings typically have a contact angle of 15 degrees. Under the action of axial force, the contact angle will increase. Angular contact ball bearings have raceways on both the inner and outer rings, and the inner and outer rings can move relative along the bearing axis. This type of bearing is particularly suitable for bearing composite loads, i.e. loads acting both radially and axially. The axial load bearing capacity of angular contact ball bearings varies with the contact angle α Increase with the increase of. The contact angle is the angle between the contact point line between the ball and raceway in the radial plane and the vertical line of the bearing axis.