Spherical Roller Bearings SKF 21305 CC

The SKF 21305 CC open self-aligning roller bearing (25x62x17 mm) compensates for misalignment and combines standard bearing clearance with increased P5 running accuracy.

The SKF 21305 CC self-aligning roller bearing is a rolling bearing designed for industrial applications involving combined loads. With key dimensions of a 25 mm bore, 62 mm outer diameter and 17 mm width, the design accommodates both radial and axial forces in both directions. The open design allows for the selection of an application-specific lubricant during operation. As it is manufactured from standard 100Cr6 rolling-element bearing steel, the bearing is suitable for operating temperatures ranging from -30 to +200 degrees.

What is the 21305 CC self-aligning roller bearing suitable for in operation?

This bearing is primarily used in mounting arrangements where deflection or misalignment occurs between the shaft and the housing. The barrel-shaped rollers run on a spherical outer ring raceway, enabling the roller bearing to self-align. Typical applications include industrial bearing arrangements subject to combined radial and axial loads. Thanks to the Explorer design, the component features an optimised internal geometry, whilst the outer ring is designed without a lubrication groove and lubrication is supplied via the housing environment.

What does the design with a sheet steel cage and P5 running accuracy mean?

In the 21305 CC self-aligning roller bearing, a sheet steel cage guides the rows of rollers and keeps the bearing weight low. The tolerance class combines standard dimensional accuracy (PN) with increased running accuracy to class P5. This ensures that the bearing runs smoothly and with low vibration. The designation CC stands for the internal design featuring a window-type steel cage. In conjunction with standard radial clearance, the open design requires the surrounding housing to be suitably sealed against dirt and moisture.