# What is the HP for this motor?

• posted on June 22, 2007, 2:33 am
Hi,
I have an old craftsman motor lying around. I checked the spec label and it does not list the HP but it list other info.
Can someone give me an idea of the HP for this motor?
The info for the motor is:
V 120 A 7.9 1725 RPM HP w0486
Thanks
Alex
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• posted on June 22, 2007, 3:04 am

Comparing it to the specs of other motors, I'd have to put this motor at roughly 1/2 HP.
todd
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• posted on June 22, 2007, 3:53 am

=======> To convert from watts to horsepower, multiply by 0.00134. The HP w0486 or: .65 hp.
Leif
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• posted on June 22, 2007, 4:14 pm
Leif Thorvaldson wrote:

Which, after accounting for losses, is 1/2 HP.
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• posted on June 23, 2007, 5:52 pm

Which, after accounting for the "Craftsman label" , is about 1/4 HP. ;~)
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• posted on June 22, 2007, 4:03 am

efficient; so somewhat over 1/2hp.
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• posted on June 22, 2007, 5:43 am

And yet another way of estimating the motor power:
Rated Input power is 120v * 7.9a = 940 watts (an estimation since this is an AC inductive load)
Assume 50% efficiency ( to account for mechanical and electrical inefficiencies, power factor, etc.) => 940 * .50 = 470 output watts. (pretty good match for the 'w0486' HP entry assuming the 486 is the motor power stated in watts)
HP (est) = 470/746 = .63
So we are in the 1/2 to 3/4 HP range.
Tom Veatch Wichita, KS USA
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• posted on June 22, 2007, 10:26 am
<Tom Veatch> wrote in message wrote:

Or, in Craftsman terms, Maximum developed horsepower is 2.
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• posted on June 22, 2007, 11:29 am
<respectfully snipped>

LOL!!! At least!
woodstuff
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• posted on June 22, 2007, 12:40 pm
Thanks a lot everyone.
Alex

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• posted on June 24, 2007, 7:32 am
Don't you mean 6???
Bob the Tomato
wrote: