Electric Motor sizing -- high amperage

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Electric Motor sizing -- high amperage Chop saw

Quite a few years ago I bought a LARGE metal chop saw and on the Dayton motor it says 10HP, 40 amp, single phase (?).
It's on a (probably 1970's) Jet 18" COM, cut off machine. ie. 18" cutoff wheels. Got everything for $100 on a rolling stand with outriggers
Luckily it came with 14 extra new blades.
After a few years use it blew one of the starter capacitors, so no problem I bought a replacement at an electric motor repair shop.

But now before I start using it again could it really be 3 phase and the motor plate be mis-marked? It did work great but a blown capacitor about 2.5" diameter and 5" tall isn't fun to be near even though it's in a metal box. (think toxic smoke).
If it starts and runs with out any stress - could it really be wired as 3 phase.
From my understanding 3 phase motors start on the 3rd and run on 2.

Edit: I do have the proper sized inlet wiring and running off a 40 amp breaker right off the 200 amp panel in my shop which is a dedicated drop from the transformer.

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[mike93lx]

How many leads are coming out of the motor? 9 would indicate 3 phase. If it is just two, it's single phase

 

[FSUwelder1212]

It's single phase, a 3 phase will run on single phase but not start with single phase power. That's how rotary phase converters work.

 

[Alchymist]

Doubt it's mismarked. 10 HP @ 40 amps 240V is pretty close. If it ran for several years, it undoubtedly is single phase. A 3 phase motor won't start on single phase anyway.

 

[Movin/on]

Thanks for the quick replies;
Yes it did have a 3 wire cable into it which I replaced with the std. plug and wires on all of my 240V 40 amp equipment. My plugs are the 50 amp rated setups.
Guess I'll start using it again. The motor spins at 3000RPM and is a 3 V-belt drive, 1 to 1 ratio to the cut off wheel. I'm afraid to stand in front of a 18" wheel spinning at that rate so I stand off to one side. It will cut a 3X3 bar in about 20 seconds with a mirror finish. I've cut heavy 3X6 channel way quicker than a A-C cutting torch with no grinding needed. The entire setup has to weigh 500#.

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[Murphy4570]

Holy **** dude that is one MASSIVE machine. Post some photos, I'd love to see that brute.

I have a 7.5HP 200V 3 phase motor on my air compressor, and that thing is heavy as hell.

 

[Techie1961]

My jaw is still on the table from reading that you got it all for $100. You ****!

 

[LXCam]

You can't run a 3ph motor on single phase power all by it's lonesome. It'll smoke the motor. And using a rotary phase converter or a static with a idler motor will only increase your total power draw through the roof. I'd suggest just sticking with what ya got.

Lets see some pic's

 

[larry_g]

One good sign that it is a single phase is the capacitor. 3 phase motors do not use caps.

lg
no neat sig line

 

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Re: Electric Motor sizing Large Chop Saw

The saw is behind a few things so I couldn't get good pictures but this represents the size. Also one of the blade