... 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 ... angular contact ball bearings; they were developed primarily for high-speed work spindles of machine tools. The spindle bearings differ from the angular ...