Cylindrical Roller Bearings are commonly separable and easy to mount and dismount.They can be divide into single row,double row and muti-row cylindrical roller bearings.They widely used bearings are cylindrical roller bearings with cage.There are single or double row bearings with a full complement of roller and other bearing arrangements.Cylindrical roller bearings have high radial load carrying capacity and also suitable for high speeds. Designs include: Single row cylindrical roller bearings Bearing series:N,NU,NJ,NUP Double row cylindrical roller bearings Bearing series:NN3000,NN4900,NNU4900 Four row cylindrical roller bearings Bearing series:FC,FCD,FCDP.