Fulthrotl
~Autocorrect is My Worst Enema.~
- Occupation
- E
It just quit running
- Thread starter ActionDave
- Start date
- Status
ptonsparky
Tom
- Occupation
- EC - retired
Not sure why they put fans on ag motors. A good share of them have the fan cover gone and or the blades. They last for years when used sporadically in grain handling. Amazed at how much abuse motors can take.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
You nailed it with the sporatic use - they usually do not run long enough to get too hot, except for fans - but those often are located in the air stream anyway.
gadfly56
Senior Member
- Location
- New Jersey
- Occupation
- Professional Engineer, Fire & Life Safety
Based on the size of the sledge hammer in one of the photos, this doesn't look to be a very large motor. Was it really cost effective to run it through intensive care? I would have thought that replacement might have been the cheaper course of action, but I admit it's been a really long time since I bought a motor for anything.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
In general 10HP or less are not worth rewinding, I guess this one wasn't rewound but still had a little intensive care put into it. Only time a 10HP or less is worth it is if it is not a standard NEMA motor, or depending on how desperately it is needed sometimes you can have one rewound in less time then it takes to get a replacement for something not in stock.
- Occupation
- Licensed Electrician
It's a 40hp c face motor and yes it was cheaper to work on this one instead of buying new.
Kwired has it right. Small motors that are burnt just get replaced.
Larger motors or small motors that just need bearings, these can be worked on and still be cost effective even when you have to do a little clean up on them.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
textile mills tend to keep motors shops hopping as well. they seem to use really strange motors from Italy that are made especially for the equipment manufacturer and take 6 weeks to get. The mill never seems to buy spare parts so the motor shops get to rebuild a lot of them. Often they can get it done same day. So, why do you need spare parts when you can pull it out and get it rebuilt faster than it takes to actually find the spare you don't have anyway.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
small motors to some are not as small as they are to others. A big motor for me is anything over 25 HP, but for some anything under 100Hp is considered a small motor.:happyyes:
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
if I can comfortably pick it up and carry it, I consider it "small".
meternerd
Senior Member
- Location
- Athol, ID
- Occupation
- retired water & electric utility electrician, meter/relay tech
Probably different for us as a power/water utility. We get paid by the hour, so cost of labor is not an issue, but we still send our motors out for repair. Disassembling, pulling and replacing bearings, etc. takes time and a shop can have 'em back pretty quick. If a rewind is necessary, they get that done at the same time. Many are direct coupled to pumps, so pump goes with the motors. Outage time is less that way. None of our motors are under 25 HP, so it takes more of a man than me to throw one into the back of a truck. We have a few 400 - 500 HP vertical. Not a do it yourself deal. Now the 6000 and 9000 HP nuclear pump motors...that was fun (at least I thought so when I was young and stupid)!
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