Abstract: Carbon commutator segments are secured to a base member by means of integral anchor pieces disposed within axially extending, cruciform-section slots formed in the outer cylindrical surface of an insulating base member. Elongate contact members having lateral edges seated in lateral parts of the slots are embedded in the anchor pieces and are each provided, at one end, with a terminal for connection to an armature winding lead wire. The carbon segments and the integral anchor pieces are formed by enclosing the base member, together with assembled contact members, in a mold and then injecting a moldable mixture of carbon powder and carrier material into the space between the mold and the assembly with the moldable mixture filling the slots and embedding that portion of each contact member disposed within the slots. When the injection molded layer has solidified, an annular-section outer portion of this injection molded layer is divided into segments by means of axially-extending radial cuts.