Single-row angular contact ball bearings are non-separable bearings with solid inner and outer and rings whose raceways are offset against each other in the direction of the bearing shaft. This allows angular contact ball bearings to be subjected to radial and axial loads. They only absorb axial forces in one direction and thus need to be adjusted against a second bearing. Single-row angular contact ball bearings are designed for high rotational speeds; however, their angular adjustability is very low. Considerably higher running noise occurs due to skewing and the service life is reduced by an additional load. Single-row STC-Steyr® angular contact ball bearings are produced in two variants – DIN 628-1 – the standard and universal versions. The contact angle is available as 25°, 30° and 40°. The greater the contact angle, the higher the axial load-carrying capacity of the angular contact ball bearings. The standard version of angular contact ball bearings is intended for bearing arrangements where only one bearing is used for each bearing point. Single-row angular contact ball bearings in the universal design are intended for fitting in pairs in X, O or tandem arrangement. They are matched in production in such a way that bearings of the same size and design can be directly installed in the aforementioned arrangements.