Self-Aligning Ball B. SKF 2306 K/C3

The SKF 2306 K/C3 self-aligning ball bearing, with a tapered bore and increased clearance (C3), measures 30x72x27 mm and compensates for shaft deflection.

The double-row self-aligning ball bearing 2306 K/C3 features two rows of balls in a common hollow-spherical outer ring raceway. This design automatically compensates for angular misalignment and shaft deflection during operation. The open bearing, made from standard rolling-element bearing steel 100Cr6, features a robust sheet steel cage. With dimensions of 30 mm bore, 72 mm outer diameter and 27 mm width, the bearing primarily handles radial forces and operates within a temperature range of -30 to +150 degrees.

What is the 2306 K/C3 self-aligning ball bearing suitable for in industrial applications?

This rolling bearing is primarily used in bearing locations where misalignment between the housing and the shaft may occur. Thanks to the spherical raceway in the outer ring, the bearing adjusts angularly without generating excessive edge stresses. Typical applications include long shaft runs or designs with separately mounted housings. As this is an open design, users select the type of lubricant and external sealing to suit the ambient conditions.

What are the advantages of the tapered bore and the C3 clearance?

The suffix ‘K’ denotes a tapered bore with a taper ratio of 1:12. This design facilitates mounting on tapered shaft seats or, when using clamping and withdrawal sleeves, on smooth shafts. When the inner ring is pushed onto the shaft, it expands, thereby reducing the bearing clearance. The factory-set increased radial bearing clearance C3 effectively compensates for this expansion during assembly as well as for temperature differences between the inner and outer rings caused by operation.