Abstract: A method of manufacturing a flat commutator comprising the steps of providing a support member having segment carrier parts; forming identical grooves in one side of said support member extending radially from the center of the support member, moulding a hub around the grooved support member with moulding compound entering the grooves; reducing the thickness of the support member from the ungrooved or abutment side of the support member until the support member is divided into a plurality of electrically isolated segment carrier parts with the moulding compound exposed in each groove; bonding an annular disc of carbon to the segment carrier parts and dividing said disc into a plurality of commutator segments.