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Commutator (electric) Wikipedia. Commutator in a universal motor from a vacuum cleaner. Parts (A) commutator, (B) brush, (C) rotor ( armature ) windings, (D) stator (F) (field) windings, (E) brush guides A commutator is a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor.Overview of T130X Superfine Grinding Mill The machine is mainly used in processing powder of mineral materials of metallurgy, building materials, chemical industry, mining, etc. It can grind non-flammable and non-explosive materials with moisture less than 6 such as Feldspar, calcite, talc, barite, fluorite, rare earth, marble, ceramics.