Self-Aligning Ball B. SKF 2212 EKTN9/C3

The SKF 2212 EKTN9/C3 self-aligning ball bearing, measuring 60x110x28 mm with a tapered bore and C3 clearance, automatically compensates for misalignment in moving shaft mountings.

The SKF 2212 EKTN9/C3 double-row self-aligning ball bearing automatically compensates for misalignment and shaft deflection during operation. The shared hollow-spherical raceway in the outer ring allows the two rows of balls to adjust freely in the event of misalignment between the inner and outer rings. Manufactured from standard rolling-bearing steel 100Cr6 to tolerance class P0/PN (ABEC 1), this open rolling bearing is suitable for operating temperatures ranging from -30 to +120 degrees Celsius.

In which installation scenarios does the 2212 EKTN9/C3 self-aligning ball bearing compensate for misalignment?

Design engineers and maintenance personnel use this design primarily for long shafts or split housings where manufacturing-related misalignments or load-induced deflections occur. Thanks to its double-row ball arrangement, the bearing absorbs radial forces and supports moderate axial loads in both directions. Typical applications include shaft mountings with elastic deformations or housing misalignment, where rigid ball bearings would suffer premature fatigue due to edge running. The open design requires a clean installation environment and a targeted external supply of lubricant.

When is a tapered bore with C3 clearance advantageous?

The tapered bore with a taper ratio of 1:12 allows direct mounting on a tapered shaft seat or, using a clamping sleeve or withdrawal sleeve, on cylindrical shafts. When the inner ring is pushed onto the shaft, the radial bearing clearance is reduced. The factory-set increased bearing clearance class C3 ensures that sufficient operating clearance remains after the bearing seat has been tightened and following operational heating. The integrated polyamide cage reduces the component’s weight and promotes quiet running.