Angular contact ball bearings are a type of precision bearing designed to support combined radial and axial loads, as well as pure axial loads, in a specific direction. These bearings are engineered with raceways in the inner and outer rings that are designed to accommodate high-speed and high-precision applications, particularly in machinery and equipment where precise positioning and controlled motion are essential.

The term angle of contact in the context of ball bearings refers to the angle formed between the direction of the load and a line perpendicular to the bearing axis. In the case of angular contact ball bearings, this angle is specifically designed to optimize the bearing's ability to support combined radial and axial loads, as well as pure axial loads in a specific direction.