Thread: Auction House Haul & Questions.

I walked away with a decent haul from the auction house this past week. I'm currently fighting insomnia, so I'll get into the post further after I wake up and start my day.

For now, I'd like to know if y'all can give me any information on this electric motor that seems to have been used as a single spindle grinding wheel?? I see the obvious rpm & hp ratings, and company name (Marathon Electric), but lack a background that would help me decipher the rest. I tried looking up the model number, no dice.

Pics.


Used the photo editor app to try and make it more readable.


P.S. There was no cord whatsoever included ! Buuuut.... it was just one of several tools on a table when the auctioneer said "No takers?? $2.50 for the whole table! Nothin? Alright, movin..." to which I piped up "YUP!"

It is a 4.6 amp, 115 volt, 1 phase @ 60 hertz. Operating temperature 40 degrees c continuous. I think thats the room max temp. So it will run on 115 volt regular house voltage. The rest i'm not sure about. Does it have black, white and green wires or it may have a bare copper wire also? Good find.

Kinda knowledgeable about motors.

Information on insulation classes for motors
NEMA Insulation Classes

The motor is rated to run continuously at 40 deg C, Hacker7 is right about that. That is usually referring to the durability/operating life of the motor itself. Continuous is the highest or second highest rating.

I think the UL code refers to a fire code of some kind relating to electrical devices. But, I'm having trouble finding anything only relating to "M".

I can't really read the first few letters of the serial number, thankfully Marathon is still in business and should be able to help you.
.: Marathon Electric :.

Single phase motors typically need additional circuits for starting. I would imagine that that circuitry would be included inside of the motor itself, but you never know, especially since the company is over a hundred years old. Who knows how old it is and which decade's electrical code it complies. This might explain why there is no cord. Is there a plug of some kind?

Okay, got a picture of the connection space.


And related parts...


And the model number begins as "MOD7Q48S..."

I did try to look up the model number on the company's website, with no luck. IMO, the "MOD" part of "MOD7Q48..." is just an abbreviation of "Model". Maybe I should try again, but including "MOD" this time...?

More from that haul!...

The grinder is under these couple tools.


Pretty much all of the rest, though I packed the box rather well, making it difficult to see half of them. One of which is a (tiny) Dremmel engraver...


So, all that, plus the half a dozen DE safety razors that I left an absentee bid for the week before, and a couple things the wife bid on. I think I walked out the door having only spent about $30.

Maybe next week I should actually bid on an air compressor, should they have one, so I can run the pneumatic tools I just got as "collateral damage" with the items I actually wanted .

I'm a little concerned about the splayed out wires below and between the blue and black wires.

Regardless, take it to a motor repair shop where they can check it over and install a cord for you. That way you won't electrocute yourself or burn down your house.

Originally Posted by Crawler

Okay, got a picture of the connection space.


And related parts...


And the model number begins as "MOD7Q48S..."

I did try to look up the model number on the company's website, with no luck. IMO, the "MOD" part of "MOD7Q48..." is just an abbreviation of "Model". Maybe I should try again, but including "MOD" this time...?

Electric motors, if reversible, will also have a diagram of the connections in that spot usually on the cover.
That was a little off subject but some helpful information. If you can't wire it yourself then do like Utopian said & take it to a shop.

After failing once again to find info on the company's website, I sent an email to the department such requests are directed to in the FAQ's. It's after business hours, so I won't hear from them until tomorrow at the soonest.

Good tip about the wiring diagram.


And the "mess of wires" is just power transmission. There are copper connectors where you hardwire a power cord.

Tried getting shots following the wires inside...






If I can't get it operational on my own (well, with the help of the community here ), and in a non-life threatening way, I'll take it to work with me one week. The maintenance crew at the plant has to deal with small motors similar to this one all the time. They may not be the last stop, but they are my first stop in professional "fixin stuff" advice. My wacky ideas entertain them, so they don't mind giving me a few minutes of their time

I almost forgot! Here are some pics of the safety razors I got. I'd say their condition ranges from "needs cleaned" to "missing/broken pieces". I think they are all caked in grime, cobwebs, and the previous owner's stubble! Certainly gonna mix up a fresh jar of Barbercide before I do anything with them.









Oh, and that Dremel I mentioned, FWIW. Model 290.

It looks like there's some cord and maybe a piece of burlap in pics 1&3 from post #8...

You'll probably want to try to flush out any oil inside of the motor, who knows how long it has been sitting in there.

Hopefully that bearing is still good and not seized, that would be a bummer. Maybe start the motor from a safe distance just to be sure...