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Bent tenon saw

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Forum topic by jtruc34 posted 01-27-2020 03:59 PM 225 views 0 times favorited 4 replies Add to Favorites Watch
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jtruc34

31 posts in 175 days


01-27-2020 03:59 PM

I’ve got a slightly bent tenon saw. It makes an S when I look at it from underneath. There is maybe 1mm variation beetwen the middle and both ends.

Might that be a problem? If so, how could I straighten it? I’ve tried to bend it back, but it doesn’t do anything, and I’m afraid that I could bend it too much and permanently.


4 replies so far

View jmartel's profile

jmartel

8741 posts in 2793 days


#1 posted 01-27-2020 04:07 PM

Check the back of the saw. If that’s bent, you can bend it back little by little to fix it. If the plate is bent, it will take a lot of bending to get it to go back.

-- The quality of one's woodworking is directly related to the amount of flannel worn.

View HokieKen's profile

HokieKen

12353 posts in 1781 days


#2 posted 01-27-2020 07:49 PM

1mm is pretty severe for a tenon saw. You’ll never get it to cut right without binding. Like jmartel said, usually it’s the saw back that causes the bend in the plate. I’d try lightly bending the back to see if you can straighten it. You can also pull the plate from the back to determine where the bend actually is – plate or spine. Then fix it or replace the offending piece.

If the saw is worth it and you can’t fix it on your own, reach out to Bob Summerfield at Rocky Mountain Saw Works. He’s kind of a wizard.

-- Kenny, SW VA, Go Hokies!!!

View JayT's profile

JayT

6386 posts in 2854 days


#3 posted 01-27-2020 07:58 PM

If the back is straight, then it’s possible the plate just needs restensioned. A S-curve is a pretty common trait of a plate that has slipped in the back and needs adjusting. Try this article:

http://www.badaxetoolworks.com/retension-a-backsaw.php

Nice part is that this technique will not do any damage. If it fixes the curve, great! If not, you can try other, more drastic means.

-- https://www.jtplaneworks.com - In theory, there is no difference between theory and practice. In practice, there is.

View SMP's profile

SMP

1809 posts in 548 days


#4 posted 01-27-2020 08:05 PM

This Paul Sellers vid is pretty good too. Helped me fix a cheap gent saw
https://m.youtube.com/watch?v=tzc4tQ5CRxk

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