Grooved pinion - / gear bore for reduced machine cycle times and reduced level of tool wear

摘要

A rotary member (10) of an endlessly grinding force transmission system can be a hub (12) for the centered connection with a shaft. The hub (12), there can be a through the latter extending central opening (18) and a plurality of radially inwardly projecting and axially extending grooves (14), which on the inner peripheral surface (16) of the central opening (18) are formed and reduced peripheral surfaces (16a) for the mechanical processing of a central bore hole (18a) through the hub (12) and define. If an interrupted by means of a machine end portion fixed cut along the reduced circumferential surfaces (16a) of the central opening (18) represents an increased coolant through flushing, during final processing machines clock times as well as the loading and the wear in the case of a drill cutter are reduced.