motor for kmg?

2

22h2

Joined
Dec 16, 2005
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I have a 1.5 hp leeson motor on my KMG and it seems like it runs hot. After running for a little while you can not touch your hand to it. is this normal? I made sure it is square with the grinder and the belt is not to tight and everything is mounted on a bench with a 3/4 plywood top. I would like to correct this before I damage the motor. any thoughts

thanks
 
I am not familiar with that motor but here goes. What speed are you running it at. Have you tried slowing it down? How hot does it get running free without a load. Does the motor have a fan under the opposite cover from the drive end and if it does are the vanes all there and is it still firmly connected to the shaft and does it move air across the outside surfaces of the motor?
 
From what you described, that doesn't sound normal to me. All of the motors I have of similar size will run indefinably, under load, without getting so hot you can't hold your hand to it.

A possibility is it is a duel voltage motor, 110-220, and it is wired for the wrong voltage. Does it have any kind of wiring diagram on it or inside a cover? Are the leads connected correctly for the voltage you're running it on?
 
I know I had a guy at a local motor repair shop tell me that some motors are designed to run as much as 120F over ambient temperature...The one he sold me for my power hammer runs warm and shows no signs of stopping...

-d
 
I work with Leeson's everyday, so the first thing I would check is your line voltage.Low line voltage will cause the motor to heat up.How many other things do you have running on that line?You might need to run it on a dedicated circuit. Good luck. Dave
 
I don't run that motor on my KMG but if the one I had ran hot or gave me reason to question I think I'd write the company and ask them about it. Not KMG but the maker of the electric motor.

Write Leeson with your name and address withe model of the motor you have and how its hooked up, line voltage, whether its dedicated or not and any other bits of info and see what they say.

leeson@leeson.com

Thats what I'd do.

STR
 
thanks for the replies, I was going to run it with no load today and see if it heated up but I ran out of time. I had to change the wiring when I got it so it would run in the correct direction but I did not check to see if it was dual voltage. It is the same motor that kmg sells.
 
Yes I missed that. Make sure you have it wired for the correct voltage and that your supply voltage is good. Long ago I used to work as a tech for 3M and found voltages as low as 90vac in some builtings.
 
The duty cycle on a belt grinder is actually very low. Yes, there are moments of high torque demands with hi current draws, but this is usually temporary and lasts for only short period..say 10-20 seconds. Most of the othertimes, the grinder is under very low loads or coasting. So, your motor shouldn't get too hot. It's hard to quantify "hot" but it certainly sounds like yours is too hot. These motors have a built in thermal protection breaker which makes them nearly indestructable. But it only works properly if the wiring is proper.

I agree with the suggestions posted. Check wiring, voltage...and even current with a clamp-on amp meter.

Unlikely, but not impossible, there might be a problem with the motor. If you bought it from Beaumont Metal Works, Inc you have a 2 year, unconditional warranty. If the motor is damaged for ANY reason within 2 years, you can get a replacement. Yes, even if it was wired incorrectly, abused, damaged in shipping... or whatever.

Good luck,
-Rob
 
rfrink said:
The duty cycle on a belt grinder is actually very low. Yes, there are moments of high torque demands with hi current draws, but this is usually temporary and lasts for only short period..say 10-20 seconds. Most of the othertimes, the grinder is under very low loads or coasting. So, your motor shouldn't get too hot. It's hard to quantify "hot" but it certainly sounds like yours is too hot. These motors have a built in thermal protection breaker which makes them nearly indestructable. But it only works properly if the wiring is proper.

I agree with the suggestions posted. Check wiring, voltage...and even current with a clamp-on amp meter.

Unlikely, but not impossible, there might be a problem with the motor. If you bought it from Beaumont Metal Works, Inc you have a 2 year, unconditional warranty. If the motor is damaged for ANY reason within 2 years, you can get a replacement. Yes, even if it was wired incorrectly, abused, damaged in shipping... or whatever.

Good luck,
-Rob
Click to expand...

Now thats service!! sucks being outside the U.S when theres people like you bulding these great machines :(
 
Here's some more info: I like to mount a toggle switch inside the connection box on the motor. This simplifies the wiring and is a convinient switch location to start and stop your motor when used on the left side of the KMG.

110089-sk4.jpg


Here is a wiring diagram that can be used with this set-up. It is for the 110089 motor, running on 110V, CCW shaft rotation (viewed from shaft end)for the KMG.

kmg-subp3.jpg


Wiring Diagram: http://beaumontmetalworks.com/motors/110089WIRING.jpg

Here is the full tutorial: http://beaumontmetalworks.com/110089-setup.html

I hope this helps,
-Rob
 
thanks everyone
I checked the wiring it looks correct. I also check running the motor without any load still gets hot. thermal overload have never kick out but it seems to hot to me. I will check the voltage next. I'm using a 20 amp switch like you would use in your home could this affect anything?
 
rfrink said:
Here's some more info: I like to mount a toggle switch inside the connection box on the motor. This simplifies the wiring and is a convinient switch location to start and stop your motor when used on the left side of the KMG.

110089-sk4.jpg




I hope this helps,
-Rob
Click to expand...

I am doing that on the next motor I wire up! Great idea.
 
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