A carbon brush is a sliding contact used to transmit electrical current from a static to a rotating part in a motor or generator, and, as regards DC machines, ensuring a spark-free commutation. Five brush-grade families are used for brush manufacturing.

A brushed alternator uses carbon brushes to help conduct electricity, while a brushless alternator uses two sets of rotors that spin together to generate and transfer the electrical current.

Schunk carbon brushes enjoy an outstanding reputation in the industry across the globe. The carbon, graphite and various metal materials we use combine good electrical and thermal conductivity with high thermal resistance.