Sheet Metal Bending Brake With Radius Adjustment

About: Just a fellow who want's to learn new tricks and skills.

This is my bending brake.

I made it from 4mm thick 40 x 40mm L-profile

6 and 12mm steel bars.

And 3, 4 and 6 mm thick flat bars.

I wanted to get brake that could bend 2-3mm thick steel. Also i wanted to be able to do some bends with bigger radius, without noticeable marks. That's why i made bending radius adjustable.

I have a small "Shop", so it has a space saving idea too, you can see it from this short video.

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Step 1: Closer Look for the "corners"

I cut grooves to the "corners" of the bracket. Used angle grinder for that.

Those grooves allows me to bend 1" high corners for the sheets, before need to use risers.

Structure is very sturdy, i must be satisfied for the result.

Step 2: Making the Frame..

You can see the main idea of the structure and the radius adjustment from these pictures.

Videos at the last step shows the actual making, and the stucture of the main parts. Idea should be seen from those.

I bought hinges, screws and nuts from my local hw-store. Those costed 5 euros.

All other material is from the recycling center and costed 30 euros.

Used tig for welding, but it could be done with mma, mig/mag too, of course.

I like to use tig, it doesn't make splatters. Build was very simple process, all parts are cut straight.

I used chop saw and angle grinder for cutting. But that's optional.

Drill press and hand drill.

M6 threading tap. M12 threaded rod. M6 nuts and bolts.

2 pieces of tight springs. Washers.

Step 3: Video Tutorials.

Videos show the actual building process.

Part 1 is from making the frame

Part 2 is from making radius adjustment and finishing.

Thanks for checking it out.

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    9 Discussions


    Question 1 year ago

    What is the maximum width that it can bend and what is the overall width of the break?

    2 answers
    The other Finnish guyGToad

    Answer 1 year ago

    Im making some improvements atm. Plans come after that. Im going to rewrite this instructable then.


    1 year ago

    Okay after watching the full video I must say your work and skills are superb. Nice chop saw too!
    I gotta ask, at no point do I see you working from a blueprint or drawings nor making measurements with any kind of anal precision. Are you pretty much winging it as you go along with a vision in your head, with only rudimentary dimensions marked with a ruler or tape as needed? How often do you make mistakes and improvise so the finished product is better than you first imagined?
    Just curious. Every time I went into a project with detailed plans and diagrams the results were awful. Nothing seemed to match up.
    However going into it with a vision, a steel ruler and a willingness to improvise as I went along had much better results for me.
    I just had to convince my friends who ultimately judged my work that "I meant to do that".


    1 year ago

    Oooh... my hero, made his own brake. I did this some years ago using 3/16 angle iron and heavy duty continuous hinge. Even though it did complete the project it was constructed for I knew it wasnt right. Didnt leave a margin for tbe offset required for the bend, you had to shift the work several times to get 90 degree bend and even then the bend was a very soft and imprecise radius.
    It was however strong enough to bend 12guage stainless 3ft wide with ease.
    Dont know if I could call it a failure or not but I had to drill so many holes in tbe 3/16 steel and hinge plate I had to design and construct a foot powered pump mounted to my milwaukee magnum drill for cutting fluid.
    Hmm... make a tool... to make a tool... I guess as long as you finish the original project its all good.
    Anyway good job on yours.