Cylindrical Roller Bearings FAG NU311 -E-XL-M1-C3

The FAG NU311 -E-XL-M1-C3 cylindrical roller bearing, measuring 55x120x29 mm, offers high radial load-carrying capacity as a free-running bearing with a brass cage.

The FAG NU311 -E-XL-M1-C3 cylindrical roller bearing is a single-row rolling bearing for industrial applications involving high radial forces. With a bore of 55 mm, an outer diameter of 120 mm and a width of 29 mm, this design can accommodate substantial loads. As the outer and inner rings can be fitted separately, the NU design facilitates installation where the shaft and housing fits are separate. The bearing is manufactured to tolerance class P0/PN or ABEC 1.

In which designs does the NU split bearing design prove its worth?

The NU design is particularly suitable for bearing arrangements where thermal length changes in the shaft must be compensated for without axial forcing. As the inner ring can be removed from both sides, the shaft moves freely axially within the bearing, whilst the cylindrical rollers provide purely radial guidance. Typical applications include bearing arrangements subject to high radial forces and varying operating temperatures. The modular design facilitates assembly and maintenance with standardised mounting dimensions.

What advantages do the brass cage and C3 bearing clearance offer in the NU311?

The solid brass cage gives the bearing resistance to vibrations and makes it suitable for demanding environmental conditions. At the same time, the slightly increased C3 radial clearance ensures that the rolling elements do not become jammed, even when the bearing heats up or in the case of tight fits. This open roller bearing is designed for a temperature range of -30 to +150 °C and requires external sealing as well as a targeted supply of lubricant to the bearing location. During assembly, it is important that the mating surfaces on the shaft and housing are clean.