Cylindrical Roller Bearings SKF NU308 ECP

The SKF NU308 ECP cylindrical roller bearing, measuring 40x90x23 mm, offers high radial load-carrying capacity as a non-locating bearing with a polyamide cage.

The SKF NU308 ECP cylindrical roller bearing, as a single-row rolling bearing, withstands high radial loads. In the Explorer version, this roller bearing features an optimised internal design for high loads. With a bore of 40 mm, an outer diameter of 90 mm and a width of 23 mm, this open bearing is suitable for designs with an external lubrication supply. As the outer ring has no groove or lubrication bore, lubricant is supplied via the surrounding bearing housing.

In which installation situations is the NU308 ECP cylindrical roller bearing used as a floating bearing?

This floating bearing does not absorb any axial forces, but instead compensates for changes in shaft length without constraint directly within the bearing. As the inner ring has no flanges, it can be removed from either side and moved axially relative to the roller set. Typical applications include radially loaded shaft mountings in mechanical engineering, where thermal linear expansion must be compensated for, whilst a separate fixed bearing at another point on the shaft provides axial guidance.

What are the distinctive features of the polyamide cage and the NU design?

The polyamide cage guides the cylindrical rollers with low friction and reduces the weight of the rotating components within the bearing. The rolling bearing is designed for use within a temperature range of –30 to +120 degrees. With dimensional accuracy to P0/PN and running accuracy to class P6, the bearing offers precise concentricity. The separate assembly of the inner and outer rings makes installation quick and easy. The standard radial bearing clearance ensures the correct operating clearance with typical fit selections.