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J Jackshaft Garage Door Opener


J-Jackshaft Garage Door Opener

Jackshaft Garage Door Opener

The Liftmaster Model J is a rock solid heavy-duty jackshaft garage door operator. This is our most popular opener used in warehouses and factories because it can be used many times per hour and stand up to the pressure. The Model J is available in 1/2, 3/4 and 1 hp configurations. The Model J is also usable with single and three phase power.



  • Dual Voltage Connections
  • Available in  1 Phase 115V and 230V, 3-Phase: 208V, 230V and 460V, 575V
  • Adjustable Friction Clutch
  • Brake Standard on 3/4HP and 1 HP Models

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Our Unconditional Written Guarantee

At Garage Doors & More, we never ask you for a blank check when you call us. Our technicians will never install parts or complete a repair without your prior consent. We also back our workmanship with an ironclad guarantee. If we make a repair and the issue do we to fix that issue - FREE

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Robert Broome Owner of Garage Doors & More

Robert Broome