Angular contact ball bearings are non-separable type bearings and typically used for carrying combined (axial and radial) loads. They can carry pure axial load and operate in higher speed. That's why many people refer to them incorrectly as thrust bearings. There are three basic types of angular contact ball bearings:
• Single Row Bearings
• Double Row Bearing
• Four Point Contact Ball Bearings

Single Row Angular Contact Ball Bearings:
Single row angular contact ball bearings can carry axial loads acting in one direction only. Under the radial loads the force acting in the axial direction needs to be countered. It is usually adjusted against the second bearing. These bearings have one high and one low shoulder on each ring allowing more number of balls to be incorporated.
There are two standard versions of single row angular contact ball bearings used for different purposes.
Only one bearing is used at a given bearing position.
Two or more bearings are positions at the given bearing position. They may be mounted adjacent, back to back or face to face position. Universal matching bearings are specially manufactured to be placed in adjacent arrangement to get a pre determined internal clearance.