Cylindrical Roller Bearings SKF NU309 ECP

The SKF NU309 ECP cylindrical roller bearing is designed for high radial loads, measures 45x100x25 mm and is used purely as a non-locating bearing.

The NU309 ECP cylindrical roller bearing is a single-row radial roller bearing in the SKF Explorer series with an optimised internal design. With a bore of 45 mm, an outer diameter of 100 mm and a width of 25 mm, this unit can accommodate high radial forces. Designed as an open bearing, it operates within a temperature range of -30 to +120 degrees. The integrated polyamide cage guides the cylindrical rollers with low friction between the fixed flanges of the outer ring.

How does the NU309 ECP cylindrical roller bearing compensate for axial displacement?

This rolling bearing is suitable for mounting positions subject to high radial loads, where thermal length changes in the shaft must be compensated for without causing stress. Due to the NU design, the outer ring has two fixed guide flanges, whilst the flangeless inner ring remains removable on both sides. The design acts as a floating bearing and absorbs longitudinal movements directly within the bearing assembly. The separate mounting of the inner and outer rings facilitates maintenance work and step-by-step installation.

What is the function of the polyamide cage and tolerance classes in the NU309 ECP?

The lightweight polyamide cage reduces the mass of the rotating parts as well as running noise during operation. The standard radial bearing clearance provides a balanced operating clearance for common shaft and housing fits. In terms of precision, this model combines dimensional accuracy to P0 or ABEC 1 with increased running accuracy of class P6 or ABEC 3. As the outer ring is manufactured without a lubrication bore and no seals are integrated, the lubricant is supplied via the housing environment.