Commutator motor, and manufacturing processes for a commutator

A commutator 22 comprises a tubular insulating portion 52, which includes a shaft hole 52A, is guided by a shaft 18 and which is provided in an end portion on one side in an axial direction of the shaft 18 with a depressed portion 52B. The commutator 22 also includes a plurality of segments 54, which are supported by an outer peripheral portion of the insulation 52 and spaced from each other in a row along a circumferential direction of the insulating portion 52 are disposed and in each case an anchoring portion 54C at one end portion on one side in the have axial direction of the shaft 18th The commutator 22 further comprises a first, second and third short circuit wire 56, 58, 60, which respectively connect the anchor portion 54C of the respective one segment 54 to the anchoring portion 54C of the respective other segment 54, wherein at least a portion formed within the on the insulating section 52 the depressed portion 52B is arranged.