Cylindrical Roller Bearings SKF NU309 ECP/C3

The SKF NU309 ECP/C3 cylindrical roller bearing, measuring 45x100x25 mm, offers high radial load-carrying capacity as a non-locating bearing with increased C3 clearance.

The SKF NU309 ECP/C3 cylindrical roller bearing, as a single-row rolling bearing, withstands high radial loads. With key dimensions of a 45 mm bore, 100 mm outer diameter and 25 mm width, the component is suitable for relevant industrial applications. The NU design features two fixed flanges on the outer ring and a flangeless inner ring. This allows the inner ring to be removed from both sides, which facilitates the separate assembly of the shaft and housing.

What functions does the NU309 ECP/C3 cylindrical roller bearing fulfil as a non-guiding bearing?

This cylindrical roller bearing is primarily used as a pure non-locating bearing to support heavy radial loads without axial guidance. As the inner ring can move axially relative to the outer ring, the bearing compensates for thermal length changes in the shaft without any constraint. Typical applications include bearing arrangements where, in addition to high radial loads, temperature-induced shaft expansion occurs, requiring axial displacement.

What do the designations ECP and C3 mean for this bearing?

The suffix ECP denotes an optimised internal design in conjunction with a lightweight polyamide cage that guides the rollers. The suffix C3 indicates a slightly increased radial clearance. This increased internal clearance helps to prevent the rolling elements from becoming jammed if tight fits or temperature differences between the inner and outer rings occur during operation. The open bearing allows for an operating temperature range of -30 to +120 degrees.