Angular Contact Ball Bearings - NSKThis is basically a back-to-back mounting of two single-row angular contact ball bearings, but their inner and outer rings are each integrated into one.Angular Contact Ball Bearings - an overview A double row angular contact bearing has similar characteristics to two single bearings arranged back to back. Its width is less than two single bearings 
TIMKEN® ANGULAR CONTACT BALL BEARING CATALOGDouble-row bearings require less axial space than two single- row bearings and can take radial loads as well as axial loads in both directions. The back-to-back Understanding Back-to-Back & Face-to-Face Bearing Mar 10, 2021 — Single-row angular contact ball bearings and tapered roller bearings are generally preloaded axially by mounting them against a second Angular contact ball bearings | SKFAngular contact ball bearings have inner and outer ring raceways that are displaced relative to each other in the direction of the bearing axis.