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Help w/ Craftsman bandsaw issues

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Forum topic by nickbatz posted 04-20-2018 01:49 AM 677 views 0 times favorited 28 replies Add to Favorites Watch
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nickbatz

54 posts in 75 days


04-20-2018 01:49 AM

Topic tags/keywords: bandsaw

My Craftsman 113.243411 bandsaw just started acting up, and I wonder whether anyone can point me in the right direction (just in case it’s something obvious and well-known before I start taking things apart).

So it suddenly started jamming intermittently, like it’s getting stuck on something. It triggers the circuit breaker, and the belt doesn’t want to move freely when I move it manually. Then when I push it hard enough, something clears. it moves again, and everyone’s happy – until it jams again after another couple of minutes of cutting.

I’ve blown out the sawdust inside the case, but I haven’t looked at the motor/belt (I mean rubber or whatever belt, not the blade). It has been squeaking from down there when it slows down.

Is this the tire, or something like that? Or does it just mean the motor is on its way out?

TIA


28 replies so far

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nickbatz

54 posts in 75 days


#1 posted 04-20-2018 01:56 AM

I should add that I’ve WD40-ed the wheels, and those bearings seem fine. The manual has some troubleshooting ideas, but I don’t think the belt is too lose, the blade isn’t shot, I’m not cutting too sharp a radius… but the one thing I will check is whether the motor is pivoting.

My hunch is that it’s not the motor, right? A failing motor wouldn’t jam, it would just get weak.

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johnstoneb

2910 posts in 2167 days


#2 posted 04-20-2018 01:58 AM

Squealing when it slows down probably the belt lipping.

-- Bruce, Boise, ID

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nickbatz

54 posts in 75 days


#3 posted 04-20-2018 02:12 AM

Belt lipping… sorry, could you possibly tell me which number that is?

https://i.imgur.com/NxMFJnx.png

Thanks!

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GrantA

123 posts in 1402 days


#4 posted 04-20-2018 02:40 AM

You said

the belt doesn t want to move freely when I move it manually. Then when I push it hard enough, something clears. it moves again, and everyone s happy – until it jams again after another couple of minutes of cutting.

Then you say

I ve blown out the sawdust inside the case, but I haven t looked at the motor/belt (I mean rubber or whatever belt, not the blade). It has been squeaking from down there when it slows down.

So are you moving the belt manually to free it or do you mean the blade? Or something else entirely?
Sounds like the belt slipping on the motor pulley

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MrUnix

6700 posts in 2193 days


#5 posted 04-20-2018 04:12 AM

Bearings would be my bet… and

I should add that I’ve WD40-ed the wheels, and those bearings seem fine.

Is probably the worst thing you can do to a bearing… it will speed up the breakdown/removal of grease and accelerate the destruction of the bearing. Fortunately, they are pretty easy and cheap to replace.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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nickbatz

54 posts in 75 days


#6 posted 04-20-2018 04:46 AM

Grant, I’m moving the blade (sorry, I wrote belt instead). The belt could be slipping and getting jammed on something, but it’s not simple slipping. That wouldn’t cause the thing to act like a giant lobster is pinching the blade.

MrUnix, I’m quite sure it’s not the bearings, because that would be constant friction, not a sudden grab. I know how bad bearings behave from the ones in my motorscooter’s gearbox – they just don’t spin freely when they’re worn. Good point about WD40 breaking down the grease in the bearings, though! Not one of my better ideas… but these are sealed, so I doubt it would have got in there.

That brings up a question: do you need a bearing puller to get the ones on these tools out? I actually ordered replacement ones for my Craftsman drill press before I picked it up. It didn’t need them, but at some point it probably will.

Okay, thanks for the replies. It’s looking like there’s no lazy way around this – I have to roll up my sleeves and take a look. :)

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MrUnix

6700 posts in 2193 days


#7 posted 04-20-2018 05:04 AM

MrUnix, I m quite sure it s not the bearings, because that would be constant friction, not a sudden grab. [...]

I’ve seen them do exactly that before, usually when the cage becomes damaged/broken. There are many ways bearings can fail. Just saying.

I know how bad bearings behave from the ones in my motorscooter s gearbox – they just don t spin freely when they re worn.

Actually, a bearing that DOES spin freely is an indication of a bad bearing, where the grease has either turned to wax or completely leaked out. A fresh bearing should not free-spin and offers resistance due to the grease present.

That brings up a question: do you need a bearing puller to get the ones on these tools out?
- nickbatz

A puller helps, but is not an absolute requirement. There are plenty of ways to remove/install bearings without the use of a puller or splitter. But each situation is different, so without seeing what you got, there is no way to tell.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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mahdee

3883 posts in 1762 days


#8 posted 04-20-2018 12:52 PM

I think Brad is right. Probably a broken ball in the bearing.

-- earthartandfoods.com

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johnstoneb

2910 posts in 2167 days


#9 posted 04-20-2018 01:21 PM

  1. 19 drive belt. slipping

-- Bruce, Boise, ID

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GR8HUNTER

3811 posts in 707 days


#10 posted 04-20-2018 03:29 PM

be very careful doing this but take the cover off and run the saw this way you can see what is happening
also is it doing it just while your cutting ?
or just running it ?
I’m thinking bearing or belt :<))

-- Tony Reinholds,Pa. REMEMBER TO ALWAYS HAVE FUN

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nickbatz

54 posts in 75 days


#11 posted 04-20-2018 06:21 PM

Thanks so much for all the replies. This is truly a great forum – lots of very helpful people.

GR8, I did that and it seems fine – but I didn’t cut, I just let it run. It’s only while cutting, but an extremely quiet voice in my head says DON’T EVEN THINK ABOUT CUTTING ANYTHING WITHOUT THE COVER ON, YOU STUPID MORON!

johsoneb… duh. I actually thought “lipping” was a part (like a lip around the belt), not a typo! :)

MrUnix, gotcha about loose bearings. Something is moving out of position and causing the thing to seize temporarily. My sense is that it’s not one of the drive wheel bearings, but next time it seizes I’ll remove the cover and look more closely – rather than just forcing it free, resuming what I was doing, and then getting annoyed after 30 seconds.

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Charlie

3 posts in 2356 days


#12 posted 04-21-2018 01:32 AM

If the breaker trips then the belt and/or blade are not slipping. Back off the blade guide blocks and see what happens.

-- Charlie

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nickbatz

54 posts in 75 days


#13 posted 04-21-2018 10:02 PM

Yeah, it has to be something like that rather than slipping. Something is impeding the blade or the belt. Will look at the guide blocks when I get a chance to tackle this issue – hopefully today.

Thanks.

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nickbatz

54 posts in 75 days


#14 posted 04-22-2018 11:53 PM

Well, the problem seems to be under the bottom belt cover, i.e. the motor or the pulley next to it…

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spindeepster

40 posts in 1285 days


#15 posted 04-23-2018 12:25 AM

Could it be the keyway….either on the motor or the pulley attached to the lower wheel? The saw I picked up just this weekend had all sorts of weird things going on…nocking, noise, vibration. The previous owner must have lost the keyway and counted on the pulley setscrew to do all the work. I put in a keyway and the improvement was incredible.

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