Cylindrical Roller Bearings FAG NU313 -E-M1

FAG NU313 -E-M1 single-row cylindrical roller bearing with a 65 mm bore, brass cage and removable inner ring for heavily loaded floating bearings.

The NU313 -E-M1 cylindrical roller bearing from FAG is a single-row radial roller bearing designed to withstand high radial loads. In the NU design, the outer ring has two fixed guide flanges, whilst the inner ring is flangeless. This allows the inner ring to be removed from both sides, which significantly simplifies the separate assembly of the shaft and housing. Fitted with a brass cage and standard radial clearance, this open roller bearing is suitable for demanding mechanical bearing arrangements.

What functions does the NU313 -E-M1 cylindrical roller bearing perform as a non-locating bearing?

The NU313 -E-M1 cylindrical roller bearing primarily functions as a conventional idler bearing in industrial machinery and gearbox construction. Thanks to the flangeless inner ring, the bearing compensates for thermally induced axial length changes of the shaft relative to the surrounding housing directly within the bearing itself, without any constraint. It is particularly suited to applications involving shaft bearings subjected to high radial loads, where axial forces are absorbed separately by an additional fixed bearing.

What is important when fitting a bearing with a removable inner ring?

In the NU design, both design and maintenance benefit from the separate mountability of the components. As the inner ring can be removed from both sides, the inner and outer rings can be fitted onto the shaft and into the housing bore independently of one another. As the bearing is of an open design and the outer ring has no lubrication bore of its own, the surrounding structure must provide external sealing as well as a proper supply of lubricating oil or grease.