angular contact ball bearing run in higher limited rotation speed, can take
radial load and axial load at the same time, and also can only take the pure
axial load. The axial load carrying capacity of angular contact ball bearings
increase with the increase of contact angle.
   1. Main structure
   (1). Single-row angular contact ball bearing
   Single-row angular contact ball bearings have separable and non-separable
designs, such as S7000 series and SN7000 series..
   (2). Double-row angular contact ball bearings
   (3). Paired and matched angular contact ball bearings
   2. Allowed angle of inclination
   3. Tolerance and clearance