... bearing manufacturer: 1,ABEC-3,5;Z2V2,Z3V3 2,High speed 3,End cover:ZZ,RS 4,Noise level:Z1,Z2 double row ... cylindrical roller bearing 1,ABEC-3,5;Z2V2,Z3V3 2,High speed ... 3,End cover:ZZ,RS 4,Noise level:Z1,Z2 double row cylindrical roller bearing is in line contact with the raceway, so the ...