Model Number: FC 2640125/P53YA Brand Name: NXZ Key Specifications/Special Features: Four-row cylindrical roller bearingFour-row cylindrical roller bearings are widely used in various rolling mills of metallurgical industry.Main characteristicFour-row cylindrical roller bearings can carry much heavier radial load, but cannot bear axial load. The radial diameter is small and the limit rotational speed is high. As the inner ring no flange, Inner ring and outer assembly (outer ring with rollers and cage).can be mounted separately. Bearings are Interchangeable, so the rolls can be changed quickly.Four-row cylindrical roller bearing is the first choice of various rolling mills for the advantage of high radial load carrying capacity, good rotational accuracy, easy installation and dismantle.Structure form

• FC type: contains one inner ring and two outer assemblies (include outer ring with flanges in each side, rollers and cage). Cage is prong-type.
• FCD type: contains two inner rings and two outer assemblies (include outer ring with flanges in each side, rollers and cage). Cage is prong-type.
• FCDP type: contains two inner rings, two outer assemblies (include outer rings without flanges, rollers and cage), two loose ribs and one guide ring. The structure of cage is prong-type, window-type or pin-type.

Cage material
Solid brass cage or steel cage is adopted for four-row cylindrical roller bearing.
Tolerance and clearance
As a roll radial support bearing, the working conditions of four-row cylindrical roller bearings are very hard. The actual working clearance is related to load, rotational speed, lubrication, temperature rise, design structure, the surface roughness, and the interference fit of inner diameter, so clearance selection shall based on the specific circumstances. It is suggest that C3 is used in the condition of cold mill or small interference fit, and C4 is used in the condition of hot rolling mill or bigger interference fit. The tolerance of four-row cylindrical roller bearing is P0, P6 or P5.