rebuilding an induction motor?

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Forum topic by derosa posted 03-06-2012 07:29 PM 2143 views 0 times favorited 7 replies Add to Favorites Watch
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1590 posts in 3074 days

03-06-2012 07:29 PM

Just about the time I was finishing up with some resawing I could smell a hot electrical smell coming from my bandsaw motor. I gave it a quick look through and didn’t see anything hot and glowing so I let it be and have just check up on it. It has taken about 40 minutes for the motor to fully cool off which seems a little long. There was no noise associated with the smell and a quick turn on with it cooled didn’t produce any odd noise either. Could I have just worked it too hard with the resawing or should I be looking at rebuilding the motor. It is a 1/2hp on my Delta bandsaw. A search of delta doesn’t seem to produce a parts list for their motors but is should be doable on these right. Any ideas where to find parts?

-- A posse ad esse

7 replies so far

View canadianchips's profile


2616 posts in 3236 days

#1 posted 03-06-2012 07:40 PM

Overheated could cost money !
Unless it is a special size for a special application, it is cheaper to buy a new one. Look for RPM, frame mount type and hp.

-- "My mission in life - make everyone smile !"

View jack1's profile


2117 posts in 4266 days

#2 posted 03-07-2012 03:47 AM

You roasted the windings and brushes. It’s probably sealed and most of these take special stuff to fix. You would be better off just biting the bullet and get a new one with warranty… Not cheap.


-- jack -- ...measure once, curse twice!

View cabmaker's profile


1744 posts in 3048 days

#3 posted 03-07-2012 03:53 AM

think baldor, buy it once. All they will need is the model and frame designations on your motor and they will take care of the rest.

View BobM001's profile


388 posts in 2569 days

#4 posted 03-07-2012 05:51 AM

If you are going to do a lot of resawing consider bumping up to a 3/4 maybe even a 1 hp motor. I read that it’s a good ideal to slow the blade FPM a bit as well. Helps the blade cool. Changing the motor pulley by 1/2 inch or installing an adjustable sheave pulley can accomplish this. Chances are that your existing motor is a 56 frame size cradle rubber mount. Know anyone that has a Grainger account?

-- OK, who's the wise guy that shrunk the plywood?

View derosa's profile


1590 posts in 3074 days

#5 posted 03-07-2012 05:57 AM

Don’t know anyone with a grainger account. After seeing here that it isn’t worth rebuilding I’ll take it to the shop that is somewhat nearby and have them size me out a 3/4, maybe a 1hp if I have the spare cash.

-- A posse ad esse

View ShipWreck's profile


557 posts in 3991 days

#6 posted 03-07-2012 11:01 AM

If you still have the bandsaw in you’re workshop pictures, you can easily adapt that saw to a 1 hp.

View BobM001's profile


388 posts in 2569 days

#7 posted 03-07-2012 03:05 PM

I have a 14” Delta and once I saw how under powered it was with the OEM motor when using a 3/4” 3 tpi resaw blade I bumped the HP up to 1 HP. HUGE difference in performance. Then I installed a manual motor starter with overloads. It bolted right onto the riser post so that I don’t have to be reaching down to find the switch.

-- OK, who's the wise guy that shrunk the plywood?

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