electric motor question

[jaspast]

I saw an ad for a 5 HP 110/220 motor on craigslist: http://losangeles.craigslist.org/wst...582551063.html

That seems high for 110...could it be correct?

[eezlock]

electric motor question

It seems a little over rated to me. An electric motor operating on 110/120 volts
will only generate about 1 1/2 or 2 hp at 20 amps, anything else is an exaggeration and not a true example of what is really happening.

Some makers of tools, have represented their products with inflated claims about how much horsepower they have as a selling point only to mislead the
customer. The amperage draw of the tool is the true example of the real
potential of what is going on...not anything else.

[Pappy]

If it's in good condition that isn't a bad price. new high hp motors can run up to $500.

[cabinetman]

It's possible it is a higher HP, as it has a 3/4" shaft. No details as to the RPM's though.

.

[LCHIEN]

its not impossible to have a 5 hp 110V motor, but it would be a rare beast.
the current would have to be at least 40A and that is doable but the motor would have very large gauge wires in the windings that would make the motor kind of oversize compared to a 5HP 220 or 440V motor which takes proportionally less current and hence smaller windings.

Besides the size of the motor (and copper expense), the branch circuit wiring would have to be twice as much copper as a 220V/440V motor, raising installation costs - which is why no one would want such a beast and it's rarity.

There's no size reference in that picture so its hard to tell and of course the real prrof of the pudding would be its nameplate which is not shown.

[jaspast]

thanks. Long-term I would like to build a band saw with plans from woodgears.ca, and I'm just keeping an eye on craigslist motors.