Cylindrical Roller Bearings SKF NU224 ECJ/C3

The SKF NU224 ECJ/C3 cylindrical roller bearing, measuring 120 × 215 × 40 mm, is a single-row idler bearing with C3 clearance, designed to accommodate high radial loads.

The NU224 ECJ/C3 cylindrical roller bearing is designed to withstand high radial loads in continuous industrial operation. With a bore of 120 mm, an outer diameter of 215 mm and a width of 40 mm, this roller bearing is suitable for solid shaft designs. SKF equips this product with an optimised internal design and a guided sheet steel cage. As an open design without sealing washers, the bearing can be easily integrated into existing lubrication systems.

What is the NU224 ECJ/C3 cylindrical roller bearing suitable for?

This roller bearing functions as a classic floating bearing for shafts where axial length changes must be compensated for within the bearing without constraint. The outer ring guides the roller set between two fixed flanges, whilst the inner ring is flangeless and removable from both sides. In industrial bearing arrangements, this design serves to compensate for heat-induced expansion of the shaft. Pure radial forces are supported by the line contact of the cylindrical rollers, which provides high rigidity.

What are the advantages of the C3 bearing clearance and tolerances?

The designation C3 indicates a slightly increased radial bearing clearance compared with the standard version. This design prevents the rollers from jamming when tight fits or temperature differences between the inner and outer rings reduce the operating clearance. The bearing covers a temperature range from -30 to +150 degrees. Dimensional accuracy to P0 or ABEC 1, combined with increased running accuracy to P6 or ABEC 3, ensures precise concentricity.