4 contact angular ball bearing:1,ABEC-3,5;Z2V2,Z3V3 2,High speed 3,End cover:ZZ,RS 4,Noise level:Z1,Z2 ... Lily bearing is a specialized manufacturer of 4 contact angular ball bearing.Manufactured to the same close tolerances as the ... materials, preloads and coatings for additional corrosion resistance. ApplicationsAngular contact ball bearings are engineered for use in high-speed, high precision ...