Four point contact bearings.
The four point contact bearings are single row angular contact ball bearings with  split inner ring. Although the contact angle is 35 °, they mainly take only axial loads from both directions. For this reason are used together with a bearing that takes over purely radial loads, the most common being from the NU… series.

 Series :QJ2; QJ3

Reducers, various mechanisms with high axial loads