Cylindrical Roller Bearings SKF NU2317 ECJ

The SKF NU2317 ECJ cylindrical roller bearing is a single-row non-locating bearing with dimensions of 85 × 180 × 60 mm, designed to accommodate high radial loads.

This design features an optimised internal structure for demanding mechanical conditions. As an open, single-row radial roller bearing, this model accommodates high radial forces, whilst the flangeless inner ring compensates for axial length changes in the shaft directly in the rolling element area. The outer ring is manufactured without a groove or lubrication bore. SKF equips the design with a sheet steel cage that guides the cylindrical rollers and is rated for a temperature range of –30 to +150 degrees.

What loads can the NU2317 ECJ cylindrical roller bearing accommodate?

As a floating bearing, this model is specifically designed for applications involving high radial forces where temperature-induced expansion of the shaft must be compensated for. The design is suitable for bearing seats subject to purely radial loads and requiring axial displacement. As the inner ring has no retaining flanges, the shaft can move relative to the housing without axial constraint, thereby preventing undesirable stresses in the bearing assembly.

What are the advantages of the NU design with a separable inner ring?

In the NU design, the outer ring has two fixed retaining flanges, whilst the inner ring is designed to be removable on both sides. This separability facilitates installation and removal, as the inner and outer rings can be mounted on the shaft and in the housing independently of one another. The combination of standard dimensional accuracy to Class P0 (ABEC 1) and finer running accuracy to Class P6 (ABEC 3) ensures low-vibration operation of the shaft.