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Edmonton 780-448-9498

Calgary 403-770-5625


1/2 HP Commercial / Industrial
Medium Duty Jack Shaft Overhead Door Opener

Standard Features

Edmonton commercial door openers that get the job done. This Opera MH 1/2 HP over head door operator is made to last.


1/2 HP, 115V 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.


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 for the operator drive shaft. Door sprocket selected for a door travel of 6"/s to 12"/s.


Mechanical Brake.

Manual Operation

Hoist-a-matic self-engaging hoist (floor level engagement device is not required to operate) for manual chain operation. An electrical interlock automatically disconnects power to the motor operator when chain hoist is engaged. Hoist on right is standard.

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 left side of the door.

Control Options

24VDC relaying circuit with a 40VA class II transformer, non-volatile memory.
Features available:

Operating mode selectable on site: C2, B2, D1, E2, T or TS

Control Accessories

Angled terminal strip allows for the connection of 3-button stations (one supplied with the operator), non-monitored sensing edges, non-monitored photo cells, one push-button radio control (external strip), ceiling pull switches, key switches, loop detectors, external interlocks, plug-in radio card and universal auxiliary output module. 2A fuse protected 24VAC output is available for accessory power supply. NEMA 4/12 or NEMA 4X protected monitored photo cells upgrade available.

Mechanical Accessories

Wall or hood mounting bracket, chain spreader, etc.
For more options contact Door Surgeon at 780-448-9498.

Cycles Ideal For Clearance / Side Room Required Max Door Height
14 cycles / hour Standard Lift 15" 14'
(50 cycles / day) (380mm) (4200 mm)

Operator Range and Current Consumption (Amp)

Horse Power 115V - 1 HP
1/2 5.0

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