Models & Variants
| Model | Manual System | Typical Application |
|---|---|---|
| OPH | Hoist-a-matic self-engaging chain hoist | Heavy-duty sectional, rolling doors & grilles |
| OHJ | Hoist-a-matic + floor level disconnect | Motorized grilles requiring manual egress path |
Both models share the same core specifications. The OHJ exists specifically for security grilles over retail frontages or parkades where building code requires a manual egress route , the floor-level disconnect lets someone operate the grille from the ground without a ladder.
Technical Specifications
| Item | Detail |
|---|---|
| Motor | 60 Hz high starting torque, continuous-duty; single-phase capacitor start or 3-phase, open drip proof, overload protected. 50 Hz 220 V 1-phase and 380 V 3-phase available. |
| Output shaft speed | 41 rpm |
| Drive | #50 roller chain with 50B12 sprocket; door sprocket selected for 6 to 12 in/s door speed |
| Reduction | 5L/B V-belt first step, then chain & sprockets; 5/8 in input, 1 in output with 1/4 in keyway |
| Brake | Mechanical brake standard; electrically activated drum-band solenoid brake available as mechanical modification for larger rolling doors |
| Manual operation | OPH: Hoist-a-matic self-engaging hoist. OHJ: Hoist-a-matic plus floor level disconnect. Electrical interlock cuts motor power when hoist is engaged. |
| Duty rating | Heavy duty, continuous-duty motor. Step up from OMH/OMJ: #50 chain (vs #41), 41 rpm (vs 36), continuous-duty (vs intermittent) , built for doors cycling all day. |
What This Operator Suits
- Heavy-duty standard, high-lift and vertical-lift sectional doors
- Rolling steel doors, sheet doors, vinyl doors and equivalents
- Wall, hood or shelf mounted on either side
Important manufacturer note: The standard configuration is intended for properly balanced rolling steel doors with less than 80 lb of imbalance. For larger or heavier rolling doors, Manaras recommends an electrically activated drum-band solenoid brake as a mechanical modification. Fitting an OPH/OHJ to a heavier rolling door without that brake is a specification error we encounter in the field.
What Fails & How We Repair It
Reversing clutch
The reversing clutch is a consumable on this series. In a warehouse seeing 30 to 50 cycles a day it typically lasts three to five years; on a loading dock running 100+ cycles daily, two to three years. When it slips, the motor runs but the door doesn't follow properly. It's field-replaceable and we keep it in stock.
Hoist system wear
The manufacturer states the hoist is designed for light, limited use during troubleshooting only , not as a substitute for a working operator. Buildings that operate the hoist daily because "the door has been playing up" wear it out quickly. We replace worn hoist components and, more importantly, fix the underlying operator issue so the hoist returns to its intended emergency-only role.
Brake & solenoid issues
On heavier rolling doors without the recommended solenoid brake, we see premature brake wear and control problems. The fix is retrofitting the manufacturer-specified drum-band solenoid brake and rebalancing the door.
Choosing Between Models
The OPJ is the same heavy-duty platform with only a floor-level disconnect (no Hoist-a-matic). If you're unsure which unit is on your door, check the data plate on the operator housing , note the model code, voltage, phase, and roughly how many cycles a day the door runs. Those three facts decide most of what we'd bring to the service call.
Parts & Accessories We Stock
- Reversing clutches (field-replaceable)
- Hoist-a-matic components
- Floor-level disconnect assemblies (OHJ)
- Drum-band solenoid brake kits for heavier rolling doors
- #50 chain, 50B12 sprockets, V-belts
- Limit switches, contactors, overload relays
Manufacturer Documentation
Original Manaras-Opera documents , useful if the paperwork for a unit already in your building has gone missing:
- Specification sheet (OPH)
- Specification sheet (OHJ)
- Sell sheet (OPH)
- Sell sheet (OHJ)
- Dimension drawing (OHJ/OPH/OPJ/OSH)
Getting Service in Metro Vancouver
We run service calls across Richmond, Vancouver, Burnaby, Surrey, Delta, North Vancouver, West Vancouver and the rest of the Lower Mainland. Whether it's a clutch replacement, a solenoid brake retrofit, a hoist repair, or a new install on a loading bay or parkade grille, we carry the parts and know the product line.
Call 778-873-7282 or tap to dial , we quote per project and schedule around your operating hours.