Cylindrical roller bearing with fou

Cylindrical roller bearing with four or more rows of rollers are used almost exclusively for rolling mills. They have lower friction than other roller bearings and can be successfully used where hight speed operation is called for. The low cross-sectional height of cylindrical roller bearings means that the roll necks can have large diameter in relation to the roll itself. In four rows cylindrical roller bearings, the rollers are guided between integral or not-integral flanges on the outer ring. The inner ring is without flanges; axial displacement of the shaft with respect to the housing can therefore be accomodated by the bearing within certain limits. Depending on the application, four rows cylindrical roller bearings can be supplied with a cylindrical bore or tapered bore. The inner or outer ring may be in one piece ore in more than one piece.