Cylindrical Roller Bearings SKF NU311 ECM/C3

The SKF NU311 ECM/C3 cylindrical roller bearing, measuring 55x120x29 mm, with a brass cage and C3 clearance, offers high radial load-carrying capacity for demanding industrial drives.

The single-row NU311 ECM/C3 cylindrical roller bearing, acting as a support bearing, absorbs high radial forces and allows for free axial length compensation directly in the rolling element area. As the inner ring can be removed from both sides, the shaft and housing can be mounted independently of one another. The solid brass cage guides the cylindrical rollers precisely and is suitable for environments subject to mechanical vibrations or increased thermal stresses.

What is the NU311 ECM/C3 cylindrical roller bearing suitable for in operation?

It is recommended for use in bearing arrangements where purely radial loads occur and changes in shaft length need to be compensated for. The NU design features two fixed flanges on the outer ring, whilst the inner ring is flangeless. This allows the component to compensate for thermal expansion of the shaft without axial preload. The optimised internal design also ensures even load distribution across the entire length of the rollers.

What advantages do the brass cage and C3 clearance offer for this application?

The slightly increased radial clearance (C3) prevents the rollers from seizing up when temperature differences occur between the inner and outer rings or when tight fits are selected. The integrated brass cage offers high mechanical strength under dynamic loads and is suitable for a temperature range of –30 to +150 degrees. As the design is open and manufactured without a groove or lubrication bore on the outer ring, lubrication is provided by the housing environment.