Cylindrical Roller Bearings SKF NJ307 ECP/C3

The SKF NJ307 ECP/C3 cylindrical roller bearing (35x80x21 mm) is designed to support high radial loads and unilateral axial forces as a support bearing.

The SKF NJ307 ECP/C3 single-row cylindrical roller bearing offers a high radial load capacity thanks to its optimised internal design. The NJ design features two fixed flanges on the outer ring and one fixed flange on the inner ring. This allows the bearing to guide the shaft in one axial direction whilst permitting axial displacement in the opposite direction. The inner ring can be removed from one side, which facilitates the separate assembly of the inner and outer rings.

What loads and movements does the NJ307 ECP/C3 cylindrical roller bearing accommodate?

Design engineers select this bearing arrangement for shaft configurations subject to high radial forces, where axial changes in shaft length must also be compensated for. Typical applications include bearing arrangements with a single-sided guiding force and thermal shaft expansion. As the inner ring can be removed from one side, the bearing can be integrated directly into assemblies designed as a fixed-floating bearing combination. In this configuration, the bearing acts as a support bearing, providing axial guidance in one direction of force.

What advantages do the polyamide cage and C3 clearance offer in this design?

The polyamide cage (suffix P) reduces friction and the weight of the rolling element set, which promotes smooth running. The increased radial clearance (C3) compensates for thermal expansion when temperature differences arise between the inner and outer rings during operation. The bearing is suitable for a temperature range of -30 to +120 degrees. As this is an open design without sealing washers, the bearing housing requires external sealing as well as a suitable lubrication supply via the housing.