Cylindrical Roller Bearings FAG NJ317 -E-M1

The FAG NJ317 -E-M1 cylindrical roller bearing combines a high radial load capacity (85 × 180 × 41 mm) with single-sided axial guidance thanks to its support bearing design.

The FAG NJ317 -E-M1 cylindrical roller bearing is a single-row radial roller bearing with a bore diameter of 85 mm, an outer diameter of 180 mm and a width of 41 mm. Thanks to the line contact between the rollers and raceways, the design can accommodate high radial loads. In the NJ version, the bearing has two fixed flanges on the outer ring and one fixed flange on the inner ring. This makes the unit suitable as a support bearing that guides shafts in an axial direction whilst allowing for relative longitudinal displacement.

What is the NJ317 -E-M1 support bearing design suitable for?

Designs incorporating NJ-type cylindrical roller bearings are used where heavy radial loads prevail and axial compensation movements of the shaft are required. The inner ring, which can be removed from one side, allows the inner and outer rings to be fitted separately. This facilitates installation where clearance is limited in industrial bearing arrangements. At the same time, the fixed flange on the inner ring absorbs axial forces from one direction, whilst compensating for thermal length changes in the opposite direction.

What advantages does the brass cage offer in this cylindrical roller bearing?

The version with a brass cage (M1) is characterised by high dimensional stability and strength. Compared with standard cages, brass withstands severe vibrations, shock loads and demanding accelerations. In conjunction with the specified temperature range of –30 to +150 degrees, the bearing is suitable for thermally demanding environments. As an open bearing without integrated sealing washers, external sealing of the bearing housing and appropriate lubrication with grease or lubricating oil must be provided.