Most electric motors are 3450 rpm or 1725. So you'd be a little short on rpm-direct drive and then you put a load on and you'll need more. 1725 will require some calc's on pulley ratios and i'd use a dbl belt or toothed belt because of load. Why would you drive a gen with an electric mtr?
NorthStar Belt-Driven Generator Head, 10,000 Surge Watts, 9600 Rated Watts, 18 HP Required

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Shipping:
Free shipping (lower 48 states) - Available nowStore Pickup:
Out of stock at Fredericksburg VA
- (4) 120V, 20A receptacles
- (1) 120V, 30A locking plug receptacle
- (1) 120/240V, 50A straight blade receptacle
- Uses NEMA 5-20R, NEMA L5-30R and NEMA L14-50R plugs
- 80 Amps @ 120 Volts; 40 Amps @ 240 Volts
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Description
Key Specs
Reviews
Q & A
Accessories
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Product Summary
What's Included
- (1) Generator
Downloads
Features + Benefits

- (4) 120V, 20A receptacles
- (1) 120V, 30A locking plug receptacle
- (1) 120/240V, 50A straight blade receptacle
- Uses NEMA 5-20R, NEMA L5-30R and NEMA L14-50R plugs
- 80 Amps @ 120 Volts; 40 Amps @ 240 Volts
- 100% copper windings
- Brushless design, less than 5% total harmonic distortion
- Bidirectional
- Thermal overload protection
- Conveniently located control panel
- Pushbutton circuit breakers
- Plugs sold separately
Key Specs
| Attribute | Specification |
|---|---|
item# | 165928 |
Brand | NorthStar |
Manufacturer's Warranty | 12 months parts/12months labor |
Ship Weight | 145.8 LB |
Required Horsepower | 18 |
Shaft Diameter | 11/10 in |
| Attribute | Specification |
|---|---|
Rated Watts | 9,600 |
Surge Watts | 10,000 |
Continuous Run Time | Yes |
Receptacles (qty.) | 6 |
Product Weight | lb |
Dimensions L x W x H (in.) | 19.5 x 14.25 x 9.0 in |
Reviews
Questions & Answers
Questions
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· 16 years ago
can be this generator be driven by electric motor?
Item # 165928-1006
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IanC· 15 years ago
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Anonymous· 15 years ago
As a mechanical engineer I can assure you that it can be driven with an electric motor. From a practical standpoint however, I don't understand why you would ever do such a thing. An electric 18hp motor would need ~14kW which puts you solidly into the 3-phase 480V industrial motors. You're talking $$$ to make that happen. With friction, electrical resistance, and other losses, you'll never get out as much energy as you use running that electric motor to turn the gen-head. If you've got 3-phase 480 available, your money would be much better spent on a transformer, a qualified electrician, and a long night at the casino.
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AllisonPowerCell· 15 years ago
For accuracy, here is another answer:
At 18HP, this device needs 26.260lb.ft. of torque for initial startup, then approx 1/2 of that for no-load, continuous running.
Now, that being said, finding an electric motor to turn this type of device comes down to finding a slave motor that will work through a specific gearing ratio to transfer the required amount of torque to the device itself.
This is the base of a design I have been working on for over 3.5yrs, with a patent pending.In short, yes it is completely possible.
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treeman5167· 16 years ago
it is impossible to put an electric motor because it costs to much and it doesn't provide enough power
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NorthStarExperts· 16 years ago
No, this generator head requires an 18 hp gas engine or larger to operate.
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· 16 years ago
I have a 2 cyl. 20Hp liquid cooled diesel engine. It's optimal rpm is 1000-1500. Are there any drive accessories (Gears) to increase my engines rpm?
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IanC· 15 years ago
I used a 1" toothed belt that needed a 30-tooth on the gen and a 90-tooth on the (in this case) hydraulic motor. Problem with gen is its 28mm shaft which I ended up having to have a machinist bore out a 7/8" hole to fit. All told, the sprockets and belt added up to about $300 which is high but did exactly what I wanted it to do-run at 1200 and drive at 3600. By changing the rpm, you can best adjust for the "green zone" on the gen's power gauge. Good luck.
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SiegeSD· 16 years ago
The drive pulley on the engine would need to be 3x the size of the pulley on the generator head to achieve the proper RPM. If your engine is running at 1200 RPM, the generator should be turning about 3600 RPM, less a little belt slippage. Larger pulleys will lose less power by not stressing the belts as much - a 5" dual pulley at the generator would be the smallest I'd want to run, meaning a 15" dual at the engine.
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NorthStarExperts· 16 years ago
This is a belt driven generator head. The size of the pulleys that you use will determine the final rpm of the gen head. A smaller pulley on the generator head and a larger one on the engine will increase your final rpm. At this time we do not offer pulleys for such an application.
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· 12 years ago
Can you also tell me how many hours this can be run each day
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Smartee· 8 years ago
No reason not 24, the engine limiting factor.
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NorthstarExpert12· 12 years ago
The NorthStar Generator Head has a 100% duty cycle. This means it can be run 24/7. Please note that it is air cooled so it can not be inside something. Must be open 7 feet all the way
around.Helpful?
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· 14 years ago
What about a direct connection to a engine via a coupling rather than belt drive. Seems like this would be easier than belts, I have a honda v twin .
It has a 1 inch crankshaft with keyway.
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martae· 13 years ago
The advantage of belts, is they cushion the generator from vibration, and other transients from the engine, they also allow you to run your engine at lower RPM. At full load this head only uses 14 Hp or so. Belts also move the generator away from the engine so that it run's cooler, and a belt is more forgiving in terms of misalignment of the shafts. It would also be hard to find a coupling for the diameter of the shafts, and the type, and size of keys.
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NorthStarExperts· 14 years ago
There are two methods to connect the generator to the engine:
1. The recommended method is to use sheaves (pulleys) and a V-belt(s).
2. An alternative method is to direct couple the generator to the engine. However this method
requires great care to align the shafts of the generator and engine to within the specified
tolerances of the chosen coupler.Helpful?
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· 14 years ago
does the engine required for this have to be 18 hp?As long a engine turns 3600rpm it should work correct?
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Willinflorida· 9 years ago
To put it simply, as electrical load is applied to the generator, it increases the magnetic field strength inside the generator. This creates resistance to the spinning of the generator. If you are only going to run small appliances or tools then you probably could get by with a smaller engine but to use this at full 10KW you will need every bit of the 18HP engine that is required.
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NorthstarExpert11· 14 years ago
This generator head requires 18 horsepower or 35ft/lbs of torque @3600 RPM's. An engine with less torque even turning at 3600 RPM's wouldn't have enough power to run it.
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· 15 years ago
What is size ( dia ) of shaft length and keyway dimensions
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martae· 13 years ago
The specs state 28mm x 2.38 in. input shaft; 8mm x 1.75 in. key way. It is not stated, but assume a standard square cross-section key. Tapering the ends will ease installation.
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NorthstarExpert11· 15 years ago
This NorthStar generator head is equipped with a shaft that is 28mm in diameter, 2.38 inches long, and has a 8mm key-way that is 1-3/4 inches long.
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· 16 years ago
Is this generator suited for reliable 24/7 operation in a stand alone/off-grid installation?
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treeman5167· 16 years ago
it is not suited for reliable 24/7 operation for off grid because the generator will burn out, that's not possible for off the grid systems. probably for backup use
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NorthstarExpert13· 16 years ago
This generator head is made to be used for backup power. It is not made to be run 24/7.
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· 16 years ago
Is this generator able to work in damp locations?
example-driven off of a water turbine.
Question 2-are bearings greasable?
3-where manufactured?
4-suitable for continuous use?
5- possible to hardwire into house breaker box?-
martae· 13 years ago
Assuming the location is ventilated, the generator will create enough waste heat to keep it dry during operation, in a damp place. You would not want to operate it where it will be sprayed with water. You do not want to leave it in a condensing environment while not in operation. Only a generator specifically designed for condensing environments would be acceptable. Perhaps you could remove it when not in operation.
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NorthStarExperts· 14 years ago
1. This item is weather resistant not waterproof, so you would want to keep it dry
2. The bearings cannot be greased
3. This item is made in Italy
4. It can be used continuously, but would not be suitable as a primary source of power
5. You can hard wire to the house but would need a transfer switchHelpful?
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· 9 months ago
Can the plugs be remote mounted from the generator?
1 answer-
NorthstarExpert12· 9 months ago
The receptacles cannot be mounted remotely from the generator.
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· a year ago
Is this a brushless generator head?
1 answer-
NorthstarExpert12· a year ago
This generator head is brushless.
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Warranty
Manufacturer's Warranty
12 months parts/12months labor
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Repair Plan — 1 Year
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Specifications
18
5
11
11/10 in
7/8 in
7/8 in
9,600
2,600
5,000
10,000
2,900
5,500
Yes
Yes
Yes
6
4
3
lb
lb
lb
19.5 x 14.25 x 9.0 in
13.75 x 7.25 x 7.75 in
16.25 x 7.5 x 7.75 in
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