precision ball bearing manufacturer: 1,ABEC-3,5;Z2V2,Z3V3 2, ... ,RS 4,Noise level:Z1,Z2 double row cylindrical roller bearing 1,ABEC-3,5;Z2V2,Z3V3 2,High speed ... 4,Noise level:Z1,Z2 double row cylindrical roller bearing is in line contact with the raceway, so the ... speed Application These bearings are mostly found in middle-sized and large-sized motors, electricity generators, internal combustion engines, ...