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9" Craftsman Bandsaw hums- will not start

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Forum topic by Jim Jakosh posted 01-15-2012 05:37 PM 2096 views 0 times favorited 15 replies Add to Favorites Watch
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Jim Jakosh

12334 posts in 1852 days


01-15-2012 05:37 PM

My friend bought a used 9” Craftsman bandsaw for us to use out here in the desert. It worked when he got it but now it just hums and will not start. I don’t see a capacitor on the motor so I thought it might be a bad spot on the armature. He rotated it and it still hums.
Any ideas?

Anyone have one of these saws that might have been through this problem?

Thanks, Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!


15 replies so far

View crank49's profile

crank49

3511 posts in 1718 days


#1 posted 01-15-2012 06:25 PM

Maybe the bearings are packed with dust. Not seized but dragging too much for the motor to spin.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View tchaser's profile

tchaser

37 posts in 1438 days


#2 posted 01-15-2012 06:34 PM

take the blade off and see off it will run and see if there is a bind on either top or bottom wheel. if not then it is probably a motor issue. if it is a bind then you probably have a bearing issue. to double check start spinning by hand and see if the motor will kick if so its a the motor more than likely.

-- bad projects make good firewood

View BobM001's profile

BobM001

388 posts in 1077 days


#3 posted 01-15-2012 06:52 PM

Make sure that the blade guide blocks aren’t to tight. Back them away from the blade. Do a thorough cleanup of the saw’s interior to eliminate any issue with dust packing .

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

View robert triplett's profile

robert triplett

1482 posts in 1852 days


#4 posted 01-15-2012 06:59 PM

I had an issue with my urethane tires rubbing the housing and melting a bit on my Delta. the saw wouldn’t budge. Took the tires off and adjusted the tracking.

-- Robert, so much inspiration here, and so little time!

View Grumpy's profile

Grumpy

19693 posts in 2598 days


#5 posted 01-16-2012 12:00 AM

Not with the bandsaw but had a similar problem with the linisher and a pressure washer. A new capacitor fixed the pressure washer.
If you don’t see a capacitor it may have worn armature brushes which may be obtainable,but I have limited knowledge of electricity other Jocks may have a better idea. In any case a new set of brushes is not expensive.

-- Grumpy - "Always look on the bright side of life"- Monty Python

View Bob Collins's profile

Bob Collins

1588 posts in 2431 days


#6 posted 01-16-2012 12:27 AM

When I got my 9” bandsaw (not a Craftsman) the motor would hum when turned on but no blade movement.
Loosened off the blade and guide blocks and all is well,

-- Bob C, Australia. I love sharing as long as it is not my tools

View Nighthawk's profile

Nighthawk

443 posts in 1104 days


#7 posted 01-16-2012 01:25 AM

Sounds like the bushes are gone…???

-- Rome wasn't built in a day... but I wasn't on that job? ... http://www.wackywoodworks.co.nz

View paratrooper34's profile

paratrooper34

760 posts in 1699 days


#8 posted 01-16-2012 02:29 AM

I have a small bandsaw similar to yours. If I torque the blade tension too tight, the motor just hums and will not turn the wheels. Maybe that’s it.

Good Luck.

-- Mike

View sedcokid's profile

sedcokid

2686 posts in 2345 days


#9 posted 01-16-2012 03:00 AM

Sure sounded like a dead spot in the windings to me!! Don’t know what the humm would be.

take care there Jim!!

-- Chuck Emery, Michigan,

View mafe's profile

mafe

9670 posts in 1836 days


#10 posted 01-16-2012 03:05 PM

Sorry no idea, hope it will start running.
good luck on it,
Mads

-- Mad F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View Woodbutcher3's profile

Woodbutcher3

364 posts in 1634 days


#11 posted 01-16-2012 09:21 PM

All the suggestions above are good ones. I’d start with a thorough cleaning inside and out, wheels and motor. Sometimes they just need the care they lacked before you owned it.
I had to take the blade bearing guides off a bandsaw I got from ny dad. The grease hadn’t been changed (Packed) since he bought it – I know I used it back in the mid 60’s. So it’s at least 45 yrs old.

-- Rod ~ There's never enough time to finish a project, but there's always time to start another one.

View Jim Jakosh's profile

Jim Jakosh

12334 posts in 1852 days


#12 posted 01-17-2012 07:57 PM

Hey, thanks for all the good suggestions!!
I brought the saw over to our site yesterday thinking I would remove the motor and clean it out for starters.
Well. I first opened the covers and gave the pully a spin and it ran just fine. I shut it off and it would not start by itself.
I noticed that it has some funny guides. The left ones are at 45 degrees to the blade and the right ones are square. I backed off all the guides and she took right off every time. It seems that lower left guide was bearing too hard on the blade and that little 2.5 amp motor could not overcome the friction to start. I set all the guides to just”kiss” the blade and she is up and running fine. I sliced off some tree blanks for today’s projects and it cuts great.

G’day, Bob. You hit it on the head!!

Maybe this will help someone else who has this problem in the future…....Jim

Thank you all for the good suggestions!!

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Grumpy's profile

Grumpy

19693 posts in 2598 days


#13 posted 01-19-2012 07:27 AM

A great result Jim and at no cost, thats even better.

-- Grumpy - "Always look on the bright side of life"- Monty Python

View Jim Jakosh's profile

Jim Jakosh

12334 posts in 1852 days


#14 posted 10-02-2013 12:44 PM

As Sarah Palin would say, You betcha!!!!!!!!

BTW, he took that saw home and bought a Grizzly 14” one from Craigslist!

cheers, Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View bigblockyeti's profile

bigblockyeti

1794 posts in 468 days


#15 posted 10-02-2013 01:55 PM

These smaller motors with no start capacitor have little starting torque to overcome any load that might be more substantial at idle than at speed where they make there power.

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