Crown Commutator Stone and Holder Set – CR101582

A commutator stone mounted in its holder, this set is a service tool for dressing the commutators of the DC electric motors used on Crown lift trucks. Held against a spinning commutator, the abrasive stone removes glazing, burn marks, and high spots, cutting the surface back to a clean, concentric ring for the carbon brushes to ride against.

A commutator that is glazed or out of round bounces the brushes, which arcs, wears brushes fast, and disrupts the current transfer the motor depends on. Dressing it with the stone restores firm, even brush contact, which is what supports steady commutation and extends both brush and commutator life between rebuilds.

The set is a maintenance item for anyone servicing Crown DC drive and pump motors. Match the stone grade to the motor and commutator being serviced, since a stone too coarse or too fine will either cut too aggressively or fail to clear the glaze.