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Can you fix a bent bandsaw blade?

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Forum topic by Kaleb the Swede posted 03-29-2015 01:16 AM 2382 views 0 times favorited 18 replies Add to Favorites Watch
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Kaleb the Swede

1732 posts in 1435 days


03-29-2015 01:16 AM

Topic tags/keywords: question tip bandsaw

I bent my 1/4 inch bandsaw blade sawing some blanks for a turning. I was just wondering if that could be beat back into shape on the anvil of a bench vise? I realize that this now is a weak spot that could potentially break, but hopefully it will survive until my new one comes in the mail.

Just wondering if any of you have done so?

Thanks in advance,

The Swede

-- Just trying to build something beautiful


18 replies so far

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MrUnix

4234 posts in 1665 days


#1 posted 03-29-2015 01:17 AM

I’ve done it just by hand… makes for an interesting cut but still worked.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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William Shelley

150 posts in 935 days


#2 posted 03-29-2015 01:18 AM

I wouldn’t risk it. If it snaps, it’s going to damage one of three things: you, your bandsaw, or what you’re cutting. Or some combination of those three.

Bending the damaged area back into shape further weakens the steel.

-- Woodworking from an engineer's perspective

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MrUnix

4234 posts in 1665 days


#3 posted 03-29-2015 01:22 AM

I wouldn t risk it. If it snaps, it s going to damage one of three things: you, your bandsaw, or what you re cutting. Or some combination of those three.

Really? I’ve had band saw blades break on many occasions and about the only thing it damages is my nerves. The pop scares the crap out of you but it doesn’t damage anything else in the process.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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ElChe

630 posts in 802 days


#4 posted 03-29-2015 01:22 AM

Break it, grind it, and solder it back if it is a nice blade? If it is a bend as opposed to a kink I’ve hammered it a bit with enough success to get me through a couple of cuts.

-- Tom - Measure twice cut once. Then measure again. Curse. Fudge.

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William Shelley

150 posts in 935 days


#5 posted 03-29-2015 01:41 AM


Really? I ve had band saw blades break on many occasions and about the only thing it damages is my nerves. The pop scares the crap out of you but it doesn t damage anything else in the process.

Cheers,
Brad

- MrUnix

I suppose that considering the wimpy amount of tension a normal bandsaw can handle, it might not be an issue.

-- Woodworking from an engineer's perspective

View gfadvm's profile

gfadvm

14940 posts in 2156 days


#6 posted 03-29-2015 01:58 AM

I wouldn’t hammer on it as you’ll wreck the set of the teeth in that one spot. I just straighten by hand and live with the vibration and rougher kerf. I have one I kinked and straightened a year ago and it hasn’t broken yet .I wish it would cause I’m too cheap to throw it away til it breaks!

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

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pmayer

864 posts in 2531 days


#7 posted 03-29-2015 02:02 AM

If it is actually creases the steel I just throw the blade out. You might be able to get a bit more use out of it by pounding it flat but in my experience it will still wobble and drive you crazy before it eventually snaps.

-- PaulMayer, http://www.vernswoodgoods.com

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firefighterontheside

13512 posts in 1323 days


#8 posted 03-29-2015 02:05 AM

What does it take to solder a blade. I had mine come apart at the solder the other day. I ordered two new ones just in case, but I can save the broken one if there is some hope of fixing it.

-- Bill M. "People change, walnut doesn't" by Gene.

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gfadvm

14940 posts in 2156 days


#9 posted 03-29-2015 02:11 AM

Bill, Many manufacturers will replace blades that break at the weld. You can repair them but it requires a GOOD scarf joint and hard (high temp) solder to hold up to the constant flexing around the wheels.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

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firefighterontheside

13512 posts in 1323 days


#10 posted 03-29-2015 02:17 AM

I should contact them to see. I got it from Randy and Jeff’s recommendation at buyfromawoodworker.com. It was great til it broke.

-- Bill M. "People change, walnut doesn't" by Gene.

View tyvekboy's profile

tyvekboy

1342 posts in 2479 days


#11 posted 03-29-2015 02:52 AM

My guess is that it can be straightened by hand or carefully with a hammer and still be usable.

I have had many bandsaw blades break on me but never bent. You might want to analyze why it got bent so you don’t do it to another blade.

There are 3 things that I can think of that may have cause the bent blade.

(1) – Upper blade guard not adjusted close to the wood being cut to minimize the amount of exposed blade above the wood. (It’s also safer if the blade breaks)

(2) – The wood being cut was not firmly held as it was being cut.

(3) – The blade was being forced to make a turn smaller than recommended for the blade.

Which one was it?

-- Tyvekboy -- Marietta, GA ………….. one can never be too organized

View ElChe's profile

ElChe

630 posts in 802 days


#12 posted 03-29-2015 03:23 AM

Lee Valley sells a jig. You can silver solder thin blades. Not sure if you can with wider blades.

-- Tom - Measure twice cut once. Then measure again. Curse. Fudge.

View rwe2156's profile

rwe2156

2198 posts in 947 days


#13 posted 03-29-2015 10:50 AM

For a 1/4” blade?

Just buy a new one.

-- Everything is a prototype thats why its one of a kind!!

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fredj

185 posts in 1284 days


#14 posted 03-29-2015 03:22 PM

I’ve had many a band saw blade snap on me but never seen one do any harm when it did. However, if you run a bent or kinked blade it will wear the “tires” on the wheels unevenly. Replacing them much more work and cost than replacing a blade. You may be able to cut out the bent part if it is very short, then solder it back together with the kit described above. Some shops that use large band saws a lot have a machine that welds blades together, but finding one and having someone weld it is too much trouble for a small blade. Buy a new blade. Or you can go whole hog : buy a band saw blade welding machine (easy to use) then buy blade stock in 200 foot rolls and make your own for fun and profit.

-- Fredj

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Kaleb the Swede

1732 posts in 1435 days


#15 posted 03-29-2015 03:41 PM

Thanks for the responses all. I have a new one on order so, I will throw the blade in that came with the saw until the new one arrives. I don’t think it’s worth it to mess with it too much. I may just for fun for roughing out turnings.

Fred that’s tempting, but if I bought a machine like that my wife would run me over with her car…and then my truck

-- Just trying to build something beautiful

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