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Delta 14" bandsaw catastrophic failure

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Forum topic by pipesmoker posted 08-16-2019 03:29 AM 495 views 0 times favorited 5 replies Add to Favorites Watch
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pipesmoker

6 posts in 2196 days


08-16-2019 03:29 AM

Topic tags/keywords: bandsaw

I picked up this Delta bandsaw, Model 28-276, curbside. It had broken trunions, which I replaced. My son used the saw a few times without issue. One day he turned it on and both tires broke. The blade did not break. What could have caused this? I don’t want to replace the tires until I know. Thanks.


5 replies so far

View MrUnix's profile

MrUnix

7469 posts in 2681 days


#1 posted 08-16-2019 03:49 AM

Old and dried out original rubber tires?

Cheers,
Brad

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

View bruc101's profile

bruc101

1361 posts in 4023 days


#2 posted 08-16-2019 04:43 AM



Old and dried out original rubber tires?

Cheers,
Brad

- MrUnix

That would be my guess also.

-- Bruce Free Plans https://traditionalwoodworking.org

View CaptainKlutz's profile

CaptainKlutz

1776 posts in 1976 days


#3 posted 08-16-2019 09:38 AM


Old and dried out original rubber tires?
Cheers,
Brad

- MrUnix

+1 Old tires.

Had the same thing happen on 17” saw a couple days ago. Turn it on, blade moved for 1 second, and boom; upper urethane tire shredded into 3 pieces. Have no clue why.
Read on WWW of one possible reason beyond old tires: If the last use(s) caused excess heating and blade tension was tightened, then saw cooled down without tension release; shrinkage during cool down puts more tension on blade/tire. When it was re-started in cool state, the over tensioning was at it’s highest and if the blade doesn’t break; the tires get compressed heavily and can fail with enough squeeze.
In my case the tire had obvious pinch mark where it failed, and I forgot to remove tension; So this logic made sense to me, but no clue if it’s actual reason? YMMV

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

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pipesmoker

6 posts in 2196 days


#4 posted 08-17-2019 12:13 PM

Thanks everyone. The tires weren’t dried out. CaptainKlutz, you nailed it! My son gave me a sheepish grin when I read your response.

View MrRon's profile

MrRon

5664 posts in 3725 days


#5 posted 08-17-2019 08:56 PM

I was using my band saw to cut aluminum and the upper band broke. I found that sharp aluminum cuttings were embedded in the rubber and cut through the rubber.

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