Cylindrical Roller Bearings FAG NU310 -E-XL-M1A-C3

The FAG NU310 -E-XL-M1A-C3 cylindrical roller bearing, with a 50 mm bore, offers high radial load-carrying capacity and functions as a separable idler bearing in mechanical engineering.

This single-row cylindrical roller bearing, the NU310 -E-XL-M1A-C3, is designed as an open roller bearing for demanding industrial applications. Thanks to the line contact between the rollers and raceways, the design can withstand high radial loads. With key dimensions of 50 mm inner diameter, 110 mm outer diameter and 27 mm width, the component complies with tolerance class P0/PN or ABEC 1. It is suitable for operating temperatures ranging from -30 to +150 degrees Celsius.

What function does the NU310 -E-XL-M1A-C3 cylindrical roller bearing fulfil as a non-locating bearing?

In rotating assemblies subject to high radial forces, the NU design typically functions as a pure idler bearing. As the inner ring is designed to be removable from both ends, the bearing compensates for axial length changes in the shaft directly within the rolling element set. This feature helps to prevent axial stress caused by thermal expansion during operation. Furthermore, the separable design facilitates the separate installation of the inner and outer rings into the housing and shaft.

What are the advantages of the brass cage and C3 clearance in the NU310?

The -E-XL-M1A-C3 variant features a solid brass cage with an external guide, which retains its dimensional stability even under vibration or rapid changes in rotational speed. The increased radial bearing clearance (C3) compensates for thermal differentials between the shaft and housing, as well as fit oversizes, during operation. As an open bearing, the outer ring has neither a ring groove nor a lubrication bore. The bearing assembly is therefore integrated into an external oil or grease lubrication system, which also provides protection against contamination.