Liftmaster 20B21-1 Drive Belt

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LiftMaster's 20B21-1 Drive Belt for various LiftMaster Screw Drive Garage Door Operators. The Drive Belt connects directly to the operator motor to drive movement of the door. The 20B21-1 is compatible with models 3130, 3240, and more screw drive openers manufactured by LiftMaster. Check the owner's manual or replacement parts diagram for specific part information before ordering to ensure compatibility.


  • LiftMaster 20B21-1 Drive Belt

  • For LiftMaster Screw Drive Operators

  • Compatible operators include models: 3130 and 3240