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Bending hint

Posted: Fri Sep 30, 2011 2:27 pm
by sawdustdave
OK, this is my first guitar....

Walnut, Spruce top, etc....

I soaked the sides for a couple of hours before bending. But the waist bend wanted to "tear out", ie, the grain would not bend on the inside like it ought. I then bent a couple of pieces of walnut, only sprayed the wood with water, before bending. Bent really well....

So... what did I learn? Bend samples first. Too much water may be a bad thing. But, above all. test first!


Dave

Re: Bending hint

Posted: Fri Sep 30, 2011 7:39 pm
by tippie53
No need to soak , we could have told you that . It isn't so much the water that makes them bend it is the heat . The water is more an anti scorch agent to help the wood bend before the cells harden

Re: Bending hint

Posted: Thu Oct 27, 2011 7:01 pm
by tippie53
wood choice is the hardest part to learn . Good wood will bend well and learning the heat that works the best for the different woods will come with time and patience .

Re: Bending hint

Posted: Fri Oct 28, 2011 11:23 am
by naccoachbob
Someone said (here or at another forum) that we spend a lot of time and energy to get the water out of the wood, so it's kind of counterproductive to introduce a lot back in by soaking. Of course, I've seen where experienced luthiers have done just that, re-introduced the water.
But I'm with John, use enough to prevent scorching.
Bob

Re: Bending hint

Posted: Mon Oct 31, 2011 11:52 pm
by CET
Hot steam quickly distributes heat through the wood. It only takes a little water on the surface of the wood to generate the needed steam. Too much water, as you get with soaking, can cause distortion problems, and isn't necessary.

Re: Bending hint

Posted: Tue Nov 01, 2011 10:31 am
by tippie53
True the less water the bender Cedar bends very well some woods like Mahogany , Paduck and Maple need more heat . The amount of water used is slight . I actually spray paper with the water that keeps the steam heating the wood.
Too much water is very problematic . Steam bending is also an old way to bend larger pieces but on Maple and Mahogany can cause the wood to continue bending as the cells loose moisture . My best advice is to keep a log on the woods you bend . Highly figured woods have their own set of problems.