... falling off, broken off side, off angle, clamp and so on. 2. From the use of terms: (1 ... rings, commutator never appears scratch, rough, ablation and so on. (2) With a good flow properties and ... set to change commutation , so that spark suppression in the permitted range, and ... size of opening. HITCACHI carbon brush,HITACHI SG-009,carbon brush for power tools,power tools carbon ...