Reliable LiftMaster Jackshaft Operators for Peace of Mind

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Commercial Door Operator – MJ

Medium-Duty Jackshaft Operator – MJ

Medium-Duty Jackshaft Operator

Wall mount for high or vertical lift sectional doors or small rolling doors and grilles.
For use on smaller, lighter commercial doors with mid-range duty-cycle requirements.
Rated duty cycle: Maximum 12 cycles per hour; Less than 50 cycles per day.
Floor level disconnect disengages operator manual lifting in an emergency.

Secure Remote Access

The built-in 3-channel Security+® receiver supports up to 20 LiftMaster 315 MHz remote controls for flexible access management.

Certified Safety Standards

Engineered to meet UL 325 safety requirements, ensuring reliable and safe operation.

Advanced Safety Sensors

Protect users and vehicles with sensors that prevent doors from closing on obstructions.

Automatic Closure Timer

Program the timer-to-close feature to automatically close doors within 5 to 60 seconds, adjustable in 5-second increments.

Motor Specifications

Equipped with a 1/2 HP, 115V single-phase motor for dependable performance.

Control Circuit Compliance

Features a 24V NEC Class 2 control circuit, meeting industry standards.

Single-Button Control

Provides a dedicated input for single-button operation, essential for external radio receiver installations.

Auxiliary Limit Switches

Includes dry form C contacts at open and closed positions, allowing control of lights, heaters, and dock levelers.

Interlock Switch

Prevents operation when the door is locked, protecting both the door and operator from damage.