Four-row cylindrical roller bearings are suitable for very high radial loads due to the large number of rolling elements. They are used almost exclusively for back-up rolls in rolling mills.

Sealed four-row cylindrical roller bearings with extremely high load capacity have a long operating life and significantly extend inspection intervals even in highly contaminated conditions with insufficient opportunity for lubrication.

Four-row cylindrical roller bearings are mainly used for heavy machineries, such as mounted on the backup roll of blooming mill, section mill, plate mill, etc. Four-row cylindrical roller bearings are mainly used on the roll necks of hot or cold rolling mills used for forming blooms, plates, and other stock. There are many variations of the bearings: the inner and outer rings can have ribs or not, the inner ring can be in one or two pieces, the bore can be cylindrical or tapered, and other variations.

All four-row cylindrical roller bearings only support radial loads; therefore, they must be used in combination with thrust bearings such as angular contact ball bearings or tapered roller bearings.