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21st Jan 2012, 02:28 AM #136New Member
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1/2" steel?
Does anyone know what dimensions I would need to change to use 1/2" steel in the design? I am located in the states and don't have access to metric flat stock.
Thanks, Don
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22nd Jan 2012, 07:36 AM #137Philomath in training
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That thread does date back so it is possible that none of those who built are using the forum at the moment.
1/2" is only (roughly) 28 thou over 12mm, so one option is to take a whisker off some 1/2" to make it metric.
You may have to look at the drawings (I haven't as I already have a finger brake) and adjust some dimensions but thinking about a typical finger brake design I doubt there would be much that would need to change as they are reasonably basic machines.
Can't help much I'm afraid
Michael
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1st Feb 2012, 09:33 PM #138Golden Member
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it doesnt need to be exactly the same. I am using 16mm by 75mm and here its in progress. You just need to change the length of the linkages to bring the fingers up/down or back/forth
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26th Mar 2012, 05:09 PM #139Golden Member
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Finally done, Thanks again
Not quite, still the handle to go
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26th Mar 2012, 06:52 PM #140Cliff....if all you have is a hammer, everything looks like a nail...
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26th Mar 2012, 07:34 PM #141Most Valued Member
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hi mate great photos. you have reminded me i want to build this tool. . why did you choose 25mm steel.
aaron
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26th Mar 2012, 07:59 PM #142Senior Member
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26th Mar 2012, 08:04 PM #143Senior Member
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26th Mar 2012, 09:36 PM #144Golden Member
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Aaron, that is 16mm by 75mm, same as the fingers
Finally, something not made in China :P
With proper handles
I actually learned a lot by making this thing.
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27th Mar 2012, 08:34 AM #145Golden Member
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Hi jackaroo,
You have made a nice job on this bender, I like how you beefed up the fingers they need it especially the narrow width ones. I made mine with some heavier sections also - see post 116.One area that I am about to modify on mine is the finger angle, I used 45 degrees but find you do not get sufficient clamping pressure on wider sheet and slippage is always on the cards. What angle have you used and have you tried it out on wide/heavy gauge material for slippage?
Bob
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27th Mar 2012, 10:26 AM #146Senior Member
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Very nice, the skills you learn from doing this is worth doing it on its own.
I would like to re-interate, this project was designed for folding small pieces of metal, it was never really designed to fold a full width all the time, unfortunatley it needs a lot of beefing up to achieve that.
Anyway nice job, and same goes for all the others, very impressive.
Steve
Designer
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27th Mar 2012, 05:39 PM #147Golden Member
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Thanks Steve[SIMSO] for the design and drawings.
Hi Krisfarm,
The angle is about 55 degree. I also used thicker material.
10mm for the linkages,
12mm for the ends.
75x50x8 for the top section where the fingers clamp to.
12x110 for the bed and 75x50x6 welded under.
The bore of that bronze is 40mm. I just tried 1.5mm SS with 150mm in length before without any issue...
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27th Mar 2012, 08:49 PM #148Golden Member
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jackaroo,
Thanks for the details and photos of your bender, the 55 degree angle and beefed up construction should help with your clamping as well. I will look forward to how you find it in use.
Bob