Cylindrical Roller Bearings SKF NU320 ECM

The SKF NU320 ECM cylindrical roller bearing is an open idler bearing with a 100 mm bore and a brass cage, designed to withstand high radial loads.

The NU320 ECM cylindrical roller bearing is a single-row rolling bearing designed for high radial loads. With key dimensions of 100 mm bore diameter, 215 mm outer diameter and 47 mm width, the bearing unit supports rotating shafts. The SKF version is manufactured with standard radial clearance. Thanks to its open design without seals, the bearing can be lubricated directly via the housing or an external lubrication system.

How does the NU320 ECM cylindrical roller bearing compensate for thermal linear expansion?

As a floating bearing of the NU design, the bearing has two fixed flanges on the outer ring, whilst the inner ring is flangeless. This design accommodates high radial forces whilst simultaneously allowing axial displacement of the shaft relative to the housing within the bearing. This allows thermal-induced changes in length to be compensated for without constraint, without causing axial stresses in the bearing system.

What are the key features of the brass cage and accuracy classes of the NU320 ECM?

The solid brass cage provides stable guidance for the cylindrical rollers and is suitable for demanding operating conditions involving vibrations or varying speeds. As the inner ring can be removed from both sides, the inner and outer rings can be fitted separately. The bearing combines dimensional accuracy to P0 or ABEC 1 with increased running accuracy to P6 or ABEC 3, ensuring consistent running characteristics across a temperature range of -30 to +150 degrees Celsius.