Tapered roller bearings support axial forces in one direction and high radial forces. They must normally be axially adjusted against a second bearing fitted in a mirror image arrangement. This bearing combination is fitted in an O or X arrangement.
Bearing in O arrangement
Bearing in X arrangement
Tapered roller bearings are not sealed and not greased. They can be lubricated using oil or grease.
Tapered roller bearings are used in electric motors when very high radial forces have to be supported and very precise bearing supports are required.