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Just smoked the motor on my Jet Bandsaw

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Forum topic by DustyJohn posted 531 days ago 858 views 0 times favorited 13 replies Add to Favorites Watch
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DustyJohn

19 posts in 532 days


531 days ago

The motor on my 12” Jet Bandsaw is toast. With a puff of smoke I heard a cash register ring. Has anyone run into this before? It’s a 1/2 hp motor. I might go up to a 1 hp, same rpm for more torque. Wondering about mounting and having to change pullies since this is probably a metric motor. Any suggestions are appreciated.


13 replies so far

View Surfside's profile

Surfside

3036 posts in 769 days


#1 posted 531 days ago

That was bad. Sorry, never owned that band saw, can’t help. Goodluck

-- "someone has to be wounded for others to be saved, someone has to sacrifice for others to feel happiness, someone has to die so others could live"

View waho6o9's profile

waho6o9

4744 posts in 1172 days


#2 posted 531 days ago

Sure it’s not just a capacitor?

Oh, & welcome to LJ’s!

View prattman's profile

prattman

440 posts in 713 days


#3 posted 531 days ago

Check the capacitors before you condemn th
e motor

-- Everyone calls me Ed or Eddie , mom still calls me Edward if she is mad at me.

View ChrisK's profile

ChrisK

1029 posts in 1677 days


#4 posted 531 days ago

I agree, check the capacitor. If the windings are cooked the breaker should have blown and there would be little smoke. The motor should have a NEMA mounting and be easy to replace. Check for enough room before buying a 1 HP motor.

-- Chris K

View helluvawreck's profile

helluvawreck

15382 posts in 1462 days


#5 posted 531 days ago

You can also check the motor wit a multimeter. Sometimes it don’t pay to get out of bad. I’m sorry about that and I hope you get it fixed.

helluvawreck aka Charles
http://woodworkingexpo.wordpress.com

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

View Cellulosespinner's profile

Cellulosespinner

62 posts in 630 days


#6 posted 531 days ago

Not the end of the world. If you can, check the capacitor first. a lot of motors use the same frame size from 1/2 hp to 1 hp so I’m not sure finding on that would fix will be a problem. However a 12” that wasn’t designed for a 1 hp motor may give you trouble down the road…...Like a 460 in a Pinto.
To check the capacitor you first have to drain it,don’t short it! I use a light bulb. then take a multimeter set at 1k and check if the needle swings(or if its a digital if you get a reading which will only last a second or so).....Then reverse the leads and check again, if the needle swings (or if you get a digital reading) it’s good…if not it’s bad. Grainger has capacitors. maybe a motor….but if you need one there are some other place to check.

-- Once in a man's life you should have a good dog, a good horse and a good woman. The trick is to get them all together at the same time

View Underdog's profile

Underdog

501 posts in 631 days


#7 posted 531 days ago

I’d buy the capacitor from Jet. I’ve had trouble getting the right aftermarket capacitors before. They aren’t that expensive.

I’ve seen several Jet mini-lathes blow a capacitor, and once replaced, the lathe still runs like a champ.

View RonInOhio's profile

RonInOhio

720 posts in 1459 days


#8 posted 531 days ago

Dust, debris or critters in the switch box of the saw can cause a short . Check the easiest things first. Remove the switch cover and blow it out with air. Check it for sawdust and critters. Someone had critters crawl into the switch box and the same thing happened to them. Poof . No power.

If the caps check out , does the motor have brushes ? If it does follow the owners manual for removing them and checking them for pits or excessive wear.

If one brush is pitted , replace both. Always replace brushes in pairs. Your manual should explain at what length the brush/s can be before it needs replaced.

If the saw has brushes and you replace them, run the saw freely for 5 minutes. This sets the brushes and will extend the life of the brushes.

View DustyJohn's profile

DustyJohn

19 posts in 532 days


#9 posted 531 days ago

I’m going to change the capacitor and cross my fingers. I’ve changed capacitors on my sander twice with success. I was resawing when the motor stopped and a smoke came out of the motor, not the capacitor. I have hopes maybe it’s a dual capacitor of some sort. I’ve spend ten bucks on more foolish things. Thanks to all for the tips, this website is awesome!

View waho6o9's profile

waho6o9

4744 posts in 1172 days


#10 posted 531 days ago

View DustyJohn's profile

DustyJohn

19 posts in 532 days


#11 posted 530 days ago

I humble myself, a new lesson learned. Just put the capacitor in and away she went. My thanx to all. When smoke came out of the motor instead of the capacitor housing, I thought the motor was toast. I didn’t know if the capacitor went out while the motor was running, it would stop. I thought it was mainly for startup.

View shampeon's profile

shampeon

1258 posts in 779 days


#12 posted 530 days ago

Well, the circuit is still going through the capacitor, so if it blows everything will stop. Glad it was something easily fixed, though. I had that same 12” Jet, and finding a face-mounted 1 HP motor was going to be tough and/or expensive.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

View chrisstef's profile

chrisstef

10364 posts in 1602 days


#13 posted 530 days ago

I hate when the magic smoke appears. Everything magically stops. Sounds like you found the antidote. Sweet.

-- "there aren’t many hand tools as awe-inspiring as the #8 jointer. I mean, it just reeks of cast iron heft and hubris" - Smitty

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