The cylindrical roller bearings to four to six rows and rows (Fig. 2) are used almost exclusively for trunnions mill, grilles or roller presses. Their friction is lower than other roller bearings. Because normally fitted with fit on the trunnion cylinder, they are particularly suited to the mills where the speed is high.

Their low section authorizes diameters trunnion quite large compared to the diameter of the roller. These bearings have a capacity of charge due to the very large number of rolls they can contain.

The cylindrical roller skf bearings several rows not tolerate that radial loads. They are fitted with ball bearings or rigid contact oblique, or with tapered roller bearings radial or axial who can tolerate axial loads.

The cylindrical roller bearings to four to six rows and rows are removable,that the rings or a shoulder fixed and the roller can be mounted separately rings free, or that all components of working capital can be mounted separately. This simplifies the installation, maintenance and control. A certain axial displacement of the tree compared to the level can be tolerated in the rotation.

Roller four rows of cylindrical roller bearings SKF have a cylindrical bore, and some dimensions are available with a conical bore. Roller conical bore can be adjusted during assembly to get a certain radial internal or pre-defined.