Thin wall angular contact ball bearing: The inner and outer rings use high-purity bearing steel that strictly controls oxide impurities that are harmful to rolling fatigue life, and adopts a structural design such as a contact angle of 60o and a large number of steel balls to make the axial rigidity of the bearing greater https://www.efindbearing.com/angular-contact-ball-bearing/thin-wall-angular-contact-ball-bearing.html