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View breid's profile

Steam bending for first time

by breid
posted 08-25-2016 06:29 PM


10 replies so far

View Loren's profile

Loren

10477 posts in 4033 days


#1 posted 08-25-2016 08:01 PM

Ash can be bent into a very tight radius, a hairpin
bend with proper back-strapping and good ash
for bending.

http://www.woodweb.com/knowledge_base/Rx_For_Bending_Wood.html

View Monte Pittman's profile

Monte Pittman

30349 posts in 2723 days


#2 posted 08-25-2016 08:35 PM

What Loren said.

Welcome to Lumberjocks

-- Nature created it, I just assemble it.

View jwmalone's profile

jwmalone

769 posts in 1087 days


#3 posted 08-25-2016 08:47 PM

Welcome. you can bend it right up to the point it breaks:) don’t go passed it. Seriously Loren is correct.

-- "Boy you could get more work done it you quit flapping your pie hole" Grandpa

View runswithscissors's profile

runswithscissors

3034 posts in 2410 days


#4 posted 08-26-2016 07:31 AM

Just to emphasize what Loren says: definitely use backstopping. Ideal material is the steel banding they use to strap together sling loads of lumber. Though unfortunately woven fiber banding seems to be replacing some of that. It wouldn’t do, as you need the steel to resist stretching. Clamp the banding tightly at both ends of the stock before you start the bend. All of the movement of wood fibers has to take place at the inside of the bend. Without the backstopping, you’ll simply break the fibers at the outside of the bend by stretching them, which they can’t stand.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

View runswithscissors's profile

runswithscissors

3034 posts in 2410 days


#5 posted 08-27-2016 08:31 PM

I meant “backstopping.” Brain fart, I guess.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

View becikeja's profile

becikeja

991 posts in 3198 days


#6 posted 08-30-2016 10:28 AM

breid thanks for starting this post. I have heard that you will get better results with air dried lumber vs kiln dried lumber. Unfortunately I do not have any experience in this area but have been thinking about trying it. Can someone comment on the air dried vs kiln dried results?

-- Don't outsmart your common sense

View JAAune's profile

JAAune

1864 posts in 2702 days


#7 posted 08-30-2016 01:20 PM

Heating wood softens the lignin which is what binds the wood fibers together. Drying the wood in a kiln basically bakes the lignin into a permanent set which prevents it from softening under heat. The same effect happens with air-dried wood that has been allowed to drop under 10% moisture content for a long period of time.

You can try to bend kiln dried wood but it is likely to break if you attempt anything more than a mild bend.

-- See my work at http://remmertstudios.com and http://altaredesign.com

View breid's profile

breid

2 posts in 1025 days


#8 posted 08-30-2016 05:06 PM

Thanks for all the advice guys, I will have to do some experimenting and see what happens. I will be happy to keep everyone posted with pictures of the project.

View Loren's profile

Loren

10477 posts in 4033 days


#9 posted 08-30-2016 06:08 PM

I bend 4/4 kiln-dried ash and walnut into 8” radius with
a strap with minimal failure. I can’t really get air
dried wood in my area. I’m sure it’s better but I’ve
had better results with kiln-dried than I expected.

View JAAune's profile

JAAune

1864 posts in 2702 days


#10 posted 08-31-2016 12:41 AM



I bend 4/4 kiln-dried ash and walnut into 8” radius with
a strap with minimal failure. I can t really get air
dried wood in my area. I m sure it s better but I ve
had better results with kiln-dried than I expected.

- Loren

Not bad but ash and walnut are some of the best species for bending and you can get around a really small radius with air-dried. I’ve done 8/4 cherry around an 8” radius and cherry isn’t the easiest to bend.

-- See my work at http://remmertstudios.com and http://altaredesign.com

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