Instructables
Picture of Easy Fork Blade Benders
Here's a simple design for a fork blade bender. This is used to bend or rake the legs for bicycle forks. It could also be used to put gradual bends in metal tubing for other uses.

It can be made with not much more than than an Oxy-acetylene torch, hacksaw, and drill press. The materials are probably all available at your local Big Box hardware store, though you should see if you could buy the angle iron as cutoff remnants from your local steel supplier, as it will be a lot cheaper.
 
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Step 1: Materials and tools

You'll need the following materials:

Angle iron, approximately 2' x 2', 2 pieces 12-18" long
Angle iron, 3/4" x 3/4", about 2'
Steel flat stock, 1" x 1/8" thick, about a foot should be plenty
2" clevis pin and a cotter pin or clip
3/8 bolt, 1 1/2" long should do, or Metric 8, or whatever you find in your junk box around this size.
A nut to match your bolt if you don't have the right tap size

And the following tools:

Drill press and drill bits
Tap to match the threads on your bolt (optional)
Hacksaw
Vise
Oxy-acetylene torch, and welding or brazing rod


hello, have just completed your bending jig. I've added a couple of uprights and a long lever with a roller attached, it works beautifully!. It's going to save me pounds and pounds as I can now buy straight fork blades which are considerably cheaper, it also means that I can reproduce the graceful bends used by Italian framebuilders of the 1950's. Thanks again!.

vincent75209 months ago

Love the "heat" blue tape photo !!!…

Thanks for posting

Bikebudy1 year ago
100% Awesome ! Just what I was trying to think up. lol

Now I can build it, I will also link this tool to my Instructable as it will be so helpfull.

Great thinking......
very interesting
poother3 years ago
nice simple design,
well illustrated
love it,
gonna make one.

need to get one of those special flames and retain my finger tips for a little more time.

cheers.
¡¡¡¡¡¡¡¡¡¡¡¡¡I Have A QuestiON!!!!!!!!!!!!!!!!!!!

 I get the issue about bending the fork Blade.
But I cannot understand, How can you reduce the tube diameter at the end of the tube???????.

Thanks
drwelby (author)  voldemortkein4 years ago
Fork blades are sold already tapered. Which is a good thing.
MMMM, I got it, Its not normal cilindrical tube.


Its tappered tube, the only thing that you do it bend it.
I Say that, cuz I'm  working on a personal project "Penny farthing".

The Fork Blade of a Penny farthing doesnt have the rake like a normal bike.

But It also have tappered end at the end of the Tube.
Then, I'll buy square tube for the beginning of tube and weld a tappered tube at the end.

Thanks man!!!!
bgrasso5 years ago
i concur; this is probably one of my favorite photos ever. if michel gondry ever uses this site he'll feel one upped.
8bit5 years ago
five stars for the heat picture
dniedz5 years ago
does the bolt seat into the actual dropout, or the base of the fork leg? what would you say the total cost of this was?
drwelby (author)  dniedz5 years ago
You usually bend the legs before you put the dropouts in. So the bolt clamps the leg. I built it out of remnants that I buy by the pound, so I'm sure it was under $20 to build.
camp6ell7 years ago
could you add a picture of a fork in the bender to show how it works?
John Smith7 years ago
I'm confused...what is a fork blade bender?
"This is used to bend or rake the legs for bicycle forks."
Whoops, it was late, and I guess I just read right over that!
razordu307 years ago
This might be one of my favorite instructables pictures ever.
tiuk7 years ago
I'm commenting just to applaud your "heat" tape on the blowtorch. Awesome.
Lftndbt tiuk7 years ago
yes, I agree... very effective!!! LoL