Cylindrical Roller Bearings SKF NU205 ECP/C3

The SKF NU205 ECP/C3 cylindrical roller bearing, measuring 25x52x15 mm, offers single-row radial support, a polyamide cage and increased C3 bearing clearance for demanding installation locations.

The NU205 ECP/C3 cylindrical roller bearing is a single-row radial roller bearing from SKF with an optimised internal design. Designed with a 25 mm bore, 52 mm outer diameter and 15 mm width, this version can accommodate high radial loads. As an open idler bearing, the NU design features two fixed flanges on the outer ring, whilst the flangeless inner ring can be removed from both sides. This allows the bearing to compensate effortlessly for axial length changes in the shaft within the raceway.

In which applications is the NU205 ECP/C3 cylindrical roller bearing used as a non-locating bearing?

Design engineers and maintenance personnel primarily use this design at bearing locations where thermal expansion of the shaft must be accommodated. The combination of linear force transmission by the rollers and axial displacement relieves housings and shafts of undesirable stresses. Typical applications are found in industrial shaft bearings subject to high radial loads. Thanks to its manufacture to dimensional accuracy class P0 (ABEC 1) and increased running accuracy class P6 (ABEC 3), the component runs smoothly even under varying load conditions.

How do the polyamide cage and C3 bearing clearance work together in the NU205?

The polyamide cage (designation ECP) guides the cylindrical rollers with low friction and absorbs shocks elastically. It limits the permissible temperature range to –30 to +120 degrees Celsius, whilst reducing inertial forces during operation. The increased radial clearance (C3) helps to ensure that the bearing does not become stressed due to operational heating or tight fits. As the outer ring has neither lubrication grooves nor bores, the lubricant is supplied from the side via the open bearing system.