angular contact roller bearing:1,ABEC-3,5;Z2V2,Z3V3 2,High speed 3,End cover:ZZ,RS 4,Noise level: ... Z1,Z2 5,C2,C0,C3... Lily bearing is a specialized manufacturer of angular contact roller bearing.Manufactured to the same close tolerances as ... the radial type, but designed with contact angles of 15 ...