Powerhead replacement parts for LiftMaster Commercial and Residential Garage Doors from Action Industries include parts to repair a wide variety of operators. Garage door powerheads contain the motor assembly and other important parts to control movement of a garage door. We have the garage door opener parts you need for a screw drive, chain drive or belt drive garage door opener manufactured by LiftMaster, Chamberlain, or Sears Craftsman. Our wide selection of powerhead hardware includes power cords, sprocket kits, transformers, pulleys, and much more. Ensure part compatibility by checking the operator manual or replacement parts diagram.