Abstract: A commutator of the arch-thrust type and process for its production, wherein at least one annular slot is provided in its segment set which is located concentrically to the longitudinal axis of the commutator and into which an armoring ring is placed which is under tension. In order to be able to produce the commutator in a cost-effective manner in spite of a high dynamic and thermal load capability, the segments are provided with punches forming the annular slots. The boundary surface of the annular slot which serves as a support of the armoring ring defines a polygon and is maintaining the insulation using molded plastic or air between the segments which are separated by insulation material radial outwardly of the annular slot.

Abstract: A commutator includes a hub, a segment set having armoring and an inner cover surface, and insulation arranged between the hub and the segment set. The segment set is forcefittingly coupled with the hub by support forces directed toward its inner cover surface. The result of this arrangement is that the hub and the insulation are radially prestressed by tension forces caused by the armoring of the segment set.