Designed for industrial sectional and small rolling doors, the MJ Medium-Duty Jackshaft Operator delivers reliable performance with a compact wall-mounted design. Featuring intuitive push-button controls, adjustable clutch protection, and programmable Timer-to-Close, it ensures smooth operation and convenient maintenance. UL 325 compliant with a two-year warranty.
Key Specifications
Voltage: 115 V single-phase
Duty Cycle: up to 12 cycles per hour
Control Station: configurable one- to three-button operation
Adjustable Friction Clutch: protects against obstructions
Programmable Timer-to-Close in 1- or 15-second increments
Security+® Technology: supports up to 20 remotes and unlimited DIP switch controls
Apply Open/Close/Stop functions with the standard three-push-button control station. Controls with one, two and three buttons are available.
Receive notifications when routine maintenance is required on your Commercial Door Operator.
Improve durability with the NEMA 1 type electrical box construction with a powdercoat finish.
Mount on the left or right side of the door. No rails to hang, the operator simply mounts on the wall and attaches to the door shaft through chain and sprocket. (3900 can mount directly to shaft)
Enable limit setting for ease of installation and adjustment to ensure accuracy even after a power failure.
Automatically close the door with Timer-To-Close (programmable in 1-second or 15-second increments).
Ensure peace of mind with a LiftMaster® two-year warranty.
