Self-Aligning Ball B. SKF 2208 EKTN9/C3

The SKF 2208 EKTN9/C3 self-aligning ball bearing, with its hollow-spherical outer ring raceway, compensates for angular misalignment and has dimensions of 40x80x23 mm.

This double-row self-aligning ball bearing, type 2208 EKTN9/C3, belongs to the group of self-aligning rolling bearings. The balls run in two grooves in the inner ring and a common spherical raceway in the outer ring. The component is made from 100Cr6 standard roller bearing steel and has the standard tolerance P0/PN or ABEC 1. It is suitable for operating temperatures ranging from –30 to +120 degrees Celsius.

What is the 2208 EKTN9/C3 self-aligning ball bearing suitable for?

This bearing design is intended for applications where misalignment or elastic shaft deflection occurs. The spherical raceway in the outer ring allows for angular misalignment between the inner and outer rings during operation without causing excessive edge stresses. Typical applications include bearing arrangements with long shafts or designs where alignment inaccuracies resulting from manufacturing and assembly processes need to be compensated for. As an open bearing, the lubrication supply can be flexibly adapted to the respective requirements via the surrounding housing system.

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

The combination of a tapered bore with a 1:12 ratio and increased C3 bearing clearance facilitates mounting on cylindrical shafts using a clamping or withdrawal sleeve. When the inner ring is pushed onto the shaft, the bearing clearance is measurably reduced. The increased initial clearance helps to ensure that sufficient operating clearance remains after tightening and during operation-related heating. The integrated polyamide cage guides the rolling elements elastically and reliably dampens vibrations during operation.