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squeal in motor

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Forum topic by Pabs posted 12-07-2011 02:55 PM 1312 views 0 times favorited 12 replies Add to Favorites Watch
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Pabs

196 posts in 2914 days


12-07-2011 02:55 PM

hey guys

my table saw motor makes a squeal when it turns.. I can get it to do it when I turn it by hand. took the side of the motor off and it really sounds like it’s coming from inside the motor,
I’m guessing the shaft is rubbing on something

how can I safely lubricate the inside of a motor?

-- Pabs


12 replies so far

View mtenterprises's profile

mtenterprises

933 posts in 2153 days


#1 posted 12-07-2011 05:10 PM

First start by blowing out the dust. Then if you have access to the ends of the shaft drop some motor oil on them. BUT you might have a bearing going bad if the oil doesn’t work temporarily you may have to dissasemble it and replace them. Ball bearings have numbers on them and they can be used to order new ones from a bearing dealer.
MIKE

-- See pictures on Flickr - http://www.flickr.com/photos/44216106@N07/ And visit my Facebook page - facebook.com/MTEnterprises

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Pabs

196 posts in 2914 days


#2 posted 12-07-2011 07:15 PM

Hey Mike

is it easy to replace them? I called a shop in town and bearings run about 20$ a piece and he said it would be about 50$ labor! I don’t mind getting dirty if I can do it myself….but never done it so not sure what’s involved

-- Pabs

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mattshack

45 posts in 2556 days


#3 posted 12-07-2011 07:36 PM

What table saw and motor do you have? I have replaced bearings before and it was fairly straightforward.

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Pabs

196 posts in 2914 days


#4 posted 12-07-2011 08:04 PM

belt driven Delta 10” TS.. motor is a 1.5hp
don’t have the model number with me…. I’ll have to check when I get home

-- Pabs

View Bertha's profile

Bertha

13003 posts in 2153 days


#5 posted 12-07-2011 09:02 PM

Speaking of belts, are you sure it’s not the belt? I saw a bearing change step-by-step somewhere around here. Was it Philip Marcou? It should be a relatively straightforward process but you might need a bearing puller. They’ve got them at autoparts stores for $10 or so. I’m not familiar with this particular motor, so you might not need one. If you want to change the belt just for good measure, Harbor Freight has some pretty good link belts for a fraction of the usual price. Good luck!

-- My dad and I built a 65 chev pick up.I killed trannys in that thing for some reason-Hog

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SASmith

1850 posts in 2447 days


#6 posted 12-08-2011 12:15 AM

Have you taken the belt off and turned on the motor?
This will tell you that it is the motor and not the arbor bearings.

-- Scott Smith, Southern Illinois

View GMman's profile

GMman

3902 posts in 3157 days


#7 posted 12-08-2011 01:03 AM

Belt tension will damage bearings, when not in use for some time take off the tension.

View Loren's profile

Loren

8295 posts in 3108 days


#8 posted 12-08-2011 01:43 AM

Usually when I’ve had squealing it has been a belt issue. Sometimes
running a noise-making motor with no load for a 1/2 hour or so
burns up dust or something and noises go away. I’ve mostly
done this on motors that have sat idle for years.

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mtenterprises

933 posts in 2153 days


#9 posted 12-08-2011 05:46 PM

Well lots of help here. The only thing I would say is do not strike any of the parts with a metal hammer you may peen them over and have to file, File, FILE to get things back together. Aw, its easy, jump right in.
MIKE
Oh and as a side bar I’ve never seen stacic belt tension ruin bearings, bearings are harder than belts.

-- See pictures on Flickr - http://www.flickr.com/photos/44216106@N07/ And visit my Facebook page - facebook.com/MTEnterprises

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Pabs

196 posts in 2914 days


#10 posted 12-08-2011 06:08 PM

thanks for all great tips guys… didn’t make it in the shop last night to try some of the things mentioned
I will try tonight and post back!

-- Pabs

View Bertha's profile

Bertha

13003 posts in 2153 days


#11 posted 12-08-2011 06:10 PM

strike any of the parts with a metal hammer
In real life, my first inclination would be to hit something with a hammer, lol.

-- My dad and I built a 65 chev pick up.I killed trannys in that thing for some reason-Hog

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Grandpa

3256 posts in 2135 days


#12 posted 12-08-2011 06:32 PM

Striking parts with a metal hammer is everyone’s first inclination. That is the reason we have to put labels on the side that states “Do not strike with a metal hammer”.
I have had motors that would not start after sitting for long long periods of time. I rolled them and got them started then let them run for half an hour. They worked fine like Loren states. Isolate the motor (remove the belt) and turn it on. that is the place to begin. Then you can add the belt or replace it. If it has been idle for a long period of time you could have a belt problem…..or a bearing problem.

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