Spherical Roller Bearings SKF 22218 EK

The SKF 22218 EK self-aligning roller bearing (90x160x40 mm) withstands high radial loads and compensates for misalignment during operation.

The 22218 EK self-aligning roller bearing is a double-row roller bearing designed for heavy-duty industrial applications involving combined loads. Thanks to the hollow-spherical outer ring raceway, the bearing can adjust its angle to compensate for shaft deflection and misalignment. This SKF Explorer version is made from standard roller bearing steel (100Cr6) and operates within a temperature range of -30 to +200 degrees. The integrated sheet steel cage guides the symmetrical rollers and keeps friction to a minimum during operation.

In which applications is the 22218 EK self-aligning roller bearing used?

Bearing arrangements subjected to combined loads primarily utilise the 22218 EK self-aligning roller bearing where high radial forces are present alongside axial forces in both directions. If shaft deflection occurs under heavy loads or misalignment between the bearing positions cannot be avoided, this roller bearing automatically compensates for the misalignment. The open bearing allows for targeted lubrication with oil or grease, tailored to the specific operating parameters of the system.

What are the distinctive features of the tapered bore and lubrication groove?

The designation ‘K’ indicates a tapered bore with a standard taper of 1:12. You can mount this bearing either directly onto a tapered shaft seat or, using a suitable mounting or withdrawal sleeve, onto cylindrical shafts, which facilitates disassembly during maintenance work. Lubricant is fed directly between the rows of rollers via the lubrication groove with lubrication holes in the outer ring. The tolerance class PN for dimensional accuracy and P5 for running accuracy ensure smooth concentricity.