OPERA - MJ (OMJ) Medium-Duty Jackshaft Operator With Floor Level Disconnect

OPERA - MJ (OMJ) Medium-Duty Jackshaft Operator With Floor Level Disconnect

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    The Opera-MJ is a medium-duty operator designed for use on standard, high and vertical lift sectional doors or rolling doors(1) and grilles.

    The operator can be wall, hood, or shelf mounted on either side of the door. It incorporates a floor level disconnect mechanism for manual operation.

    The operator is available with the new Electronic Control Board (BOARD 070) with or without the option of electrical control for MONITORED external entrapment protection devices (UL325-2010 compliant).


    1/2 HP, 120V single phase intermittent-duty motor with instant reverse and internal automatic reset thermal overload protection. Removable without affecting limit switch settings. Also available with 50Hz motor, consult inside sales. 

    First step in reduction 5L/B V-belt drive, additional steps by chain and sprockets. Input shaft is 5/8", supported by precision ball bearings. Output shaft is 1" with 1/4" keyway, supported by ball bearings. Output shaft speed: 36 rpm.

    Friction type, positioned on input shaft, easily adjustable from outside.

    #41 roller chain with a 41B12 sprocket on operator drive shaft. Door sprocket selected for a door travel of 6"/s to 12"/s.

    Mechanical brake.

    Manual Operation:
    Floor level disconnect mechanism which must be engaged for manual push-up operation.

    Electrical Enclosure:
    All electrical components are in a Nema 1 enclosure. Hinged electrical enclosure cover.

    Limit System:
    Rotary-type oil-impregnated steel cams, commercial grade switches. Limit shaft is supported by self-lubricating bronze bushings for increased precision. Remains in time when there is a manual operation or after the motor has been removed.

    Accu-cam® Feature:
    Precise and quick one-handed adjustment of the limits.

    Corrosion Protection:
    Frame and control enclosure protected by baked on, long lasting enamel finish. Polymer control box cover. All shafts protected by yellow chromate coating. 

    Wall, hood, or shelf mounted on the right or on the left of the door. For indoor use only.

    Clearance: side room required 15" (380 mm)
    Maximum Door Height: 14" (4260 mm)
    For more details, please consult our Dimensions Drawing.

    Shipping Weight:
    Approx. 60 Lbs - 27 Kg.

    2 Years.

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