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Bow in Oak Strips

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Forum topic by richgreer posted 05-15-2010 08:17 PM 813 views 0 times favorited 3 replies Add to Favorites Watch
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richgreer

4541 posts in 2541 days


05-15-2010 08:17 PM

I just cut some 1.5 inch wide strips from a wide board of 6/4 oak. I didn’t notice a bow in the original oak board, but each of the strips had a noticeable bow. I straightened the strips out on the jointer and I had to make a couple of passes on each side to do it.

Now I wonder – - Should I have waited awhile after cutting these strips before I straightened them. Is there a risk that they may still move some more?

FWIW, the oak had been acclimated to my shop for about 2 weeks.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.


3 replies so far

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grizzman

7798 posts in 2770 days


#1 posted 05-16-2010 12:16 AM

rich i think it depends on the moister content of the piece …did you buy it two weeks ago…depending on that, they might bow again…..i have a pretty large stash of old lumber that i do most of my work with, but if i were going to buy lumber on a more regular basis…i would have a meter and check it all…...but that is just my 2 cents…good luck..

-- GRIZZMAN ...[''''']

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Greedo

470 posts in 2427 days


#2 posted 05-16-2010 02:01 PM

oak that isn’t dry enough has a tendancy to start bowing pretty much at eyesight because when cutting you expose a part that has more moisture=more volume to the air, if you wait then it slowly springs back but it takes a few weeks. but it never comes back to it’s original postion.
i once cut and planed straight a wet piece of oak to see what would happen, it started bending, warping and splitting at eyesight within 30 minutes. you could see it move and there were several wide splits along the entire length. but after a couple of weeks the piece got flat again and the splits had disappeared entirely.
i was thought that acclimating wood to a shop is pointless, the wood is supposed to have the correct moisture value already. if it doesn’t then it won’t help to let it sit a few weeks, but rather a few years.

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richgreer

4541 posts in 2541 days


#3 posted 05-16-2010 02:18 PM

Thanks to both grizzman and Greedo. You both make a lot of sense.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

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