Rotor assembly for DC motor

A rotor assembly for a DC motor, the rotor assembly comprising:

• a rotor having a rotor shaft;
• a commutator mounted to the rotor shaft;
• and
• a varistor connected to the commutator via an electrically-conductive solderless fixing means, wherein the electrically-conductive solderless fixing means comprises electrically-conductive adhesive;
• wherein the varistor is provided as a looped element sleeved on the commutator, and the commutator extends through the varistor;
• a support element mounted between the commutator and a rotor-facing surface of the varistor to support the varistor, the varistor is provided with a plurality of electrodes on an opposite surface to the rotor-facing surface of the varistor, the electrically-conductive adhesive forms a plurality of adhesive joints between the electrodes of the varistor and the commutator.