Self-Aligning Ball B. SKF 2218 K/C3

The SKF 2218 K/C3 self-aligning ball bearing, measuring 90x160x40 mm, with a tapered bore and increased C3 clearance, compensates for misalignment.

The SKF 2218 K/C3 self-aligning ball bearing is a double-row rolling bearing with a common hollow-ball raceway in the outer ring. This design automatically compensates for misalignment and shaft deflection during operation without causing additional friction. The open bearing, made from standard 100Cr6 rolling-element steel, features a sheet steel cage and is suitable for a temperature range of -30 to +150 degrees.

What is the 2218 K/C3 self-aligning ball bearing suitable for?

This rolling bearing is particularly suitable for bearing arrangements where shaft deflection or misalignment between the inner and outer rings occurs. Typical applications can be found in mechanical engineering on long shafts and in bearing arrangements with design-related misalignments. As the bearing is open at both ends, it can be flexibly lubricated with oil or grease and, thanks to the lightweight sheet steel cage, achieves low friction losses.

What do the tapered bore and the C3 clearance mean for the application?

The version with the suffix ‘K’ features a tapered bore with a ratio of 1:12. This allows you to mount the rolling bearing either directly onto a tapered shaft seat or, using a mounting or withdrawal sleeve, onto smooth cylindrical shafts. The slightly increased radial clearance (C3) compensates for the reduction in radial clearance that occurs when the inner ring is axially pushed onto the tapered surface, and prevents internal stresses caused by operational heating.