automotive and industrial groups: the tapered roller bearing was Timken's principal product in the antifriction industry segment. it consisted of four components: the cone, the cup, the cages, and the tapered rollers. the roller bearing contained many individual and highly tolerance components. when properly applied to a qualified axle journal, it became a system whose function was to carry the weight of the rail car and its cargo reliably, with minimum rolling resistance. the bearing stack comprised both load-carrying and non-load-carrying components.