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Gearhead (GH) style commercial door operators employ lubricated gears for heavy industrial, high cycle applications. GH-style operators include a floor level chain hoist to ease manual operation in an emergency or power outage.

All LiftMaster Openers and Operators should be purchased through a Dealer and professionally installed.


  • MyQ® Technology enables you to securely monitor and control your facility operator and lights with your smartphone, tablet or computer for greater peace of mind.
  • Alerts can be received as email or pop-up (push) notifications on a mobile device, ensuring the status of your commercial door.
  • MyQ Mobile App is a free download with no annual activation fee.
  • Requires 828LM MyQ Internet Gateway to connect to MyQ Smartphone App.
  • Dual Voltage Connections increase flexibility by enabling the installer to select the required voltage within phase, to meet job-site requirements.
  • Single-Phase: 115V and 230V, 3-Phase: 208V, 230V and 460V, 575V is a discrete model without field-selectable voltage.
  • Heavy-Duty Worm Gear-In-Oil Gear Reducer delivers performance for heavy industrial, high cycle applications.
  • Control Function Selector Dial enables easy selection and programming of (7) wiring types, from constant pressure to close, to specialized Timer-to-Close functionality to meet end-user needs.
  • Continuous-Duty High-Starting Torque Motor performs in demanding industrial overhead door applications.
  • Motor Removable without Affecting Limit Switch Settings saves time and money for maintenance.
  • Mid-Stop enables partial opening of door to a preprogrammed position for energy savings, time savings and convenience.
  • Maximum Run Timer reverses or stops door if closing time exceeds expected time-frame to limit damage to door and operator.
  • Delay-On-Reverse Circuit prevents abrupt reversal of door, reducing wear on the door and operator system.
  • 3-Button Control Station with Maintenance Alert System (MAS) provides open/close/stop functions and notification when routine maintenance is required.
  • Continuous-duty high-starting torque motor with instant reverse and overload protection. Available in 1/2, 3/4, 1, 1-1/2, 2 and 3 HP; single- or three-phase. Capacitor start on single-phase. Removable without affecting limit switch settings.
  • Operators are factory preset to C2 wiring, providing momentary contact to open and stop, with constant contact to close.
  • 5V DC NEC Class 2.
  • 45:1 first-stage using heavy-duty gears running in oil bath; cast iron housing. Special “all-climate” synthetic gear oil for greater low-temperature performance; #50 output sprocket chain.
  • Sealed roller bearings in gear reducer.
  • Brake standard on GH operators.
  • NEMA 1 type electrical box, heavy-duty 11-gauge steel frame with durable powder coat finish, all reduction sprockets drilled and pinned to shafts.
  • Two-year warranty.
  • UL 325 requires all commercial door operators to be either constant pressure to close or be equipped with a primary external monitored entrapment protection device.
  • Security+ 2.0 safeguards your facility – with every click, a new code is sent to the commercial door operator so the door opens only for you.
  • Timer-To-Close conveniently and confidently closes the commercial door automatically after a predetermined amount of time has elapsed for added security and peace of mind.
  • Floor Level Chain Hoist with Electrical Interlock provides easy disconnect and manual operation in an emergency.


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