Cylindrical Roller Bearings SKF NJ311 ECP

The SKF NJ311 ECP cylindrical roller bearing (55x120x29 mm) can withstand high radial loads and supports shafts axially in one direction.

The SKF NJ311 ECP cylindrical roller bearing is a single-row roller bearing with a 55 mm bore, an outer diameter of 120 mm and a width of 29 mm. In the Explorer version, the roller bearing features an optimised internal design to accommodate high radial forces in demanding industrial applications. Thanks to two fixed flanges on the outer ring and one fixed flange on the inner ring, the component functions as a support bearing. This enables the shaft to be axially fixed on one side whilst still allowing movement in the opposite direction.

What loads does the NJ311 ECP cylindrical roller bearing accommodate?

This cylindrical roller bearing primarily accommodates heavy radial loads whilst simultaneously providing axial guidance for the shaft in one direction. It is specifically used in bearing arrangements where operational length expansion of the shaft must be compensated for. The inner ring, which can be removed from one side, facilitates the separate assembly of the inner and outer rings. As an open design, the roller bearing requires lubrication via the housing and operates within a temperature range of -30 to +120 degrees Celsius.

What are the functions of the NJ design and the polyamide cage?

The NJ design is characterised by two flanges on the outer ring and one flange on the inner ring, which ensures that axial displacement in one direction is maintained. The integrated polyamide cage guides the cylindrical rollers quietly and has a low weight. With standard radial bearing clearance, dimensional accuracy P0/PN (ABEC 1) and running accuracy P6 (ABEC 3), the bearing is suitable for guide bearings without a lubrication bore in the outer ring.