... ,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 ... of single, double and multiple rows among which the single row cylindrical roller bearings are most applicable. Normally these bearings can accommodate radial ...