... cover:ZZ,RS 4,Noise level:Z1,Z2 double row cylindrical roller bearing is in line contact with the raceway, so ... single, double and multiple rows among which the single row cylindrical roller bearings are most applicable. Normally these bearings can accommodate ... load.Lubrication Lubrication Groove &3 Holes in Outer Ring Structure Cylindrical roller bearings N series,NU series,NF series,NUP series ...