Cylindrical Roller Bearings SKF NU304 ECP/C3

The SKF NU304 ECP/C3 cylindrical roller bearing, a single-row idler bearing with a 20 mm bore and an outer diameter of 52 mm, accommodates high radial loads.

This single-row NU304 ECP/C3 cylindrical roller bearing combines a compact design with an optimised internal structure for radial loads. The open bearing has a width of 15 mm and transmits high radial forces through the line contact between the rollers and raceways. Thanks to SKF’s manufacturing processes, the design meets dimensional accuracy requirements in accordance with tolerance class P0, as well as enhanced running accuracy in accordance with P6.

What is the NU304 ECP/C3 cylindrical roller bearing suitable for as a support bearing?

The NU304 ECP/C3 cylindrical roller bearing is primarily used as a conventional non-locating bearing for rotating shafts. As the inner ring has no flanges and is designed to be removable from both sides, the bearing compensates for operational length expansion of the shaft within the housing axially without any axial restraint. Typical applications include shaft mountings where purely radial guidance is required and axial forces are supported separately.

What are the benefits of the polyamide cage and C3 clearance?

The polyamide cage guides the rolling elements and ensures quiet operation within the permitted temperature range of -30 to +120 degrees Celsius. The increased radial clearance of class C3 compensates for dimensional changes that occur with tight fits or thermal differences between the outer and inner rings. When installed in an assembly, an external housing seal and a suitable lubrication supply must be provided.