High precision angular contact ball bearings are composed of an outer-circle, inner circle, steel ball and retainer. It can not only support the radial load and axial load but also it can only sustain the axial load. Besides, it can operate stably with a relatively high speed. According to the row, the angular contact ball bearing can be classified into single row one and two-row one. Here the article will mainly introduce the single row angular contact ball bearing. The so-called single row angular contact ball bearing can only support one directional axial load. When it supports the pure radial load, it will bring about the inner axial thrust load because the action line of the roller loading is not in the same radial face with the action line of the radial load. So this bearing should be set up in pair.
