... 2,High speed 3,End cover:ZZ,RS 4,Noise level:Z1,Z2 The roller of the cylindrical roller bearing is in line ... , double and multiple rows among which the single row cylindrical roller bearings are most applicable. Normally these bearings can accommodate radial ... .Lubrication Lubrication Groove &3 Holes in Outer Ring Structure Cylindrical roller bearings N series,NU series,NF series,NUP series Features ...