Cylindrical Roller Bearings FAG NU309 -E-XL-M1-C3

The FAG NU309 -E-XL-M1-C3 cylindrical roller bearing, with a 45 mm bore and a brass cage, offers high radial load capacity with increased C3 bearing clearance.

The NU309 -E-XL-M1-C3 cylindrical roller bearing is a single-row radial roller bearing designed for demanding industrial applications. With key dimensions of 45 mm inner diameter, 100 mm outer diameter and 25 mm width, this FAG roller bearing design can withstand very high radial forces. Designed as an open bearing, it can be flexibly integrated into existing lubrication circuits. The brass cage guides the rolling elements reliably, even under thermal stress.

What is the NU309 -E-XL-M1-C3 cylindrical roller bearing suitable for as a non-locating bearing?

In many designs, axial length changes in the shaft caused by heating must be compensated for without inducing stress. The NU design functions as a classic floating bearing. The inner ring has no flanges and can be removed from either side. This design therefore allows for free axial movement of the shaft relative to the housing. The bearing is particularly suitable for shaft mountings in mechanical engineering where high radial loads occur and linear expansion must be compensated for.

What advantages do the brass cage and C3 clearance offer with this bearing?

The combination of the M1 brass cage and the slightly increased radial clearance (C3) is designed for demanding operating conditions. Brass is characterised by good run-out properties and high dimensional stability, which is advantageous in the event of vibrations or rapid changes in speed. The C3 bearing clearance provides additional radial play. This prevents the rollers from seizing up when temperature differences arise between the inner and outer rings, or when tight fits reduce the operating clearance once the bearing is installed.