Cylindrical Roller Bearings FAG NJ312 -E-XL-M1A-C3

The FAG cylindrical roller bearing NJ312 -E-XL-M1A-C3 (60x130x31 mm) serves as a support bearing capable of withstanding high radial loads, featuring a solid brass cage and increased C3 clearance.

This single-row radial roller bearing from FAG withstands very high radial forces and guides shafts axially in one direction. The NJ design is characterised by two fixed flanges on the outer ring and one fixed flange on the inner ring. This allows the inner ring to be removed from one side for installation. Designed as an open bearing, the construction requires external sealing and lubrication via the housing system.

What functions does the NJ312 -E-XL-M1A-C3 cylindrical roller bearing perform as a support bearing?

In bearing arrangements subject to high radial loads, this design serves as a fixed or support bearing in combination with suitable mating bearings. The line contact of the cylindrical rollers enables a high radial load-carrying capacity. As this design functions as a support bearing, it compensates for thermally induced axial changes in the shaft length in one direction, whilst absorbing axial forces from the opposite direction.

What function do the brass cage and C3 clearance fulfil during operation?

The solid brass cage (M1A), which is guided on the outer ring flange, is characterised by high rigidity under vibrations or acceleration forces. The guidance on the outer ring flange ensures that the rolling element guidance retains its dimensional stability. The increased bearing clearance class C3 provides additional radial clearance. This counteracts the rolling elements becoming jammed when operational temperature differences occur between the inner and outer rings, or when tight fits are installed. The permissible temperature range is from –30 to +150 degrees Celsius.