Kohlebürste

摘要

The invention relates to a carbon brush for grinding on the collector segments of the collector of an electric machine under force. A brand new carbon brush (1) can be bedded in rapidly without a costly treatment of the collector segments by making at least one groove (4) in the grinding surface to be applied to the collector (2) of the machine. Said groove (4) extends parallel to or almost parallel to the segments (3) of the collector.