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STEAM BENDING HINGE JIG

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Project by kiefer posted 309 days ago 4282 views 17 times favorited 19 comments Add to Favorites Watch

This a steamed wood bending jig that I am currently using to make some bent wood hinges for a box that I am building .
I used the micro wave stem bending process and this form with a discarded timing belt which has Kevlar imbedded into it and does not stretch as opposed to steel strap and a stop block made from plywood .
The process I used is soak the wood blank which in this case is 1”x11”x1/8” walnut for about an hour in warm water . Steam the blank in the MV for about a minute wrapped in a wet towel and let rest for about four minutes then reheat for another minute and let rest again and then a final reheat for another minute.
Run to the shop leaving the wood rapped in the hot wet towel and wearing gloves ,this thing is steaming hot !
Insert the blank into the ready jig and lock on the stop block ,keeping tension on the piece as I bend it around the 7/8” radius form and helping form by pushing with my left hand against the belt in the sharp bend area.
When the main bend is formed I clamp a pressure block to the belt and form to create the reverse bend .
After the part has cooled for several hours I remove it from the form and insert a wood plug and clamp it ( see pic 2 ) .
The biggest issue I have is finding straight grain wood and I also have only kiln dried lumber available .
The process seems to work but it took several attempts and failures to figure out the timing of the steaming process but I have made several parts now and it seems to work fairly consistently .
I will post the box with the hinges soon for you to look at .

-- Kiefer 松





19 comments so far

View Earlextech's profile

Earlextech

917 posts in 1295 days


#1 posted 309 days ago

I’ve never used the microwave system but with standard steaming I’ve found that doubling the steam time for kiln dried wood usually does the trick.

Can’t wait to see the project!

-- Sam Hamory - The project is never finished until its "finished"!

View michelletwo's profile

michelletwo

2196 posts in 1621 days


#2 posted 309 days ago

I use an old metal gutter on my cookstove and fill with water & the wood. Put a top on it. Keep it just under boiling/simmering..I have bent kiln dried oak& ash pretty well this way. I also try hard to find rift or quartersawn wood

-- We call the destruction of replaceable human made items vandalism, while the destruction of irreplaceable natural resources is called development.

View Jim Jakosh's profile

Jim Jakosh

11099 posts in 1710 days


#3 posted 309 days ago

Very cool Idea!!!!!!!!!!..............Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View stefang's profile

stefang

12605 posts in 1939 days


#4 posted 309 days ago

Good way to heat the wood, and I like the timing belt idea too.

-- Mike, an American living in Norway.

View hoss12992's profile

hoss12992

2473 posts in 498 days


#5 posted 309 days ago

This is really cool. I have not tried steaming wood yet, but have some projects coming up that I will be trying it on. Very interesting on your setup. Great job and thanks for posting. I look forward to seeing your finished project.

-- The Old Rednek Workshop https://www.facebook.com/theoldrednekworkshoptn

View TurnTurnTurn's profile

TurnTurnTurn

585 posts in 1714 days


#6 posted 309 days ago

Great idea, can’t wait to see the finished product.

-- TurnTurnTurn

View kiefer's profile

kiefer

2971 posts in 1272 days


#7 posted 309 days ago

Earlextech
What attracted me to micro wave heating is the time it takes and the convenience but is limited by the size of the MV .
Michelle
In my neck of the woods walnut oak ash are only available from the lumber yard as does not grow here ,so I am stuck with whatever I can get .
The box should be ready in a couple of days and I will post it then .
Just thought this would be of interest to some and would get lost in the box post .

-- Kiefer 松

View HillbillyShooter's profile

HillbillyShooter

4380 posts in 897 days


#8 posted 309 days ago

Interesting process—look forward to seeing your project using this hinge part.

-- John C. -- "Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth." George Washington

View jbschutz's profile

jbschutz

385 posts in 1296 days


#9 posted 309 days ago

Kiefer, I am amazed at the tight radius you are able to achieve. I gotta try this! Thanks for the info.

-- jbschutz www.johnschutz.com

View jaykaypur's profile

jaykaypur

3264 posts in 1013 days


#10 posted 309 days ago

Good job and your work/set-up is, yet again, brilliant!

-- Use it up, Wear it out --------------- Make it do, Or do without!

View woodshaver's profile

woodshaver

2740 posts in 1958 days


#11 posted 309 days ago

Your system works well Kiefer. You have produced some really nice and unique work using your method.
Your work is always interesting. Thanks for sharing.

-- Tony C , My high school shop teacher said "You can do it"... Now I can't stop!

View Roger's profile

Roger

14177 posts in 1409 days


#12 posted 309 days ago

I knew I should have kept my old rear belt when I replaced it on my Heritage.. LOL

-- Roger from KY. Work/Play/Travel Safe. Kentuk55@bellsouth.net

View michelletwo's profile

michelletwo

2196 posts in 1621 days


#13 posted 309 days ago

ah, alberta. I have had success with maple too…maybe you have that? the microwave method will only do short pieces,,the advantage of the stove method is one can make very long pieces, if one needs to. thought I would share it with you. thanks for sharing your pieces & your methods

-- We call the destruction of replaceable human made items vandalism, while the destruction of irreplaceable natural resources is called development.

View Ken90712's profile

Ken90712

14848 posts in 1794 days


#14 posted 309 days ago

Very cool idea, nice!

-- Ken, "Everyday above ground is a good day!"

View shipwright's profile

shipwright

4849 posts in 1403 days


#15 posted 308 days ago

Fun to watch kiefer. My steam bending experience is so different.
I see a very interesting hinge coming here.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

showing 1 through 15 of 19 comments

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