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Posted by Ries on May 4, 2008, 8:02 pm
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The force needed to bend metal goes up by the square of the thickness
increase.
This means it takes 4 times the machine to bend twice the thickness.
The $500 16 gage brakes are cheap, overrated (that is, they fudge on
their stats) chinese imports.
A decent american made 16 gage brake is closer to a grand.
Imagine needing to build 4 times the machine, to bend 1/8", and you
start to see why the Chicago D&K machines, made here, are north of 5
grand.
Cheapest heavy duty manual brakes I know of are the Grizzlys. They
make a couple of 12 gage brakes that will bend 1/8".
The G0542, for example, will do what you want, and, at about $1500, is
a bargain. Just on a per pound basis, its only .88 a lb. You cant buy
raw steel for that where I live, much less machined, welded, and
assembled into a brake.
And its a very flexible tool that will do all kinds of sheet metal
work.
The other alternative is a cheap press brake die, in a hydraulic
press. Together, probably similar money, but more suited to production
bending of just one bend.
The problem is that 24" of bend gets you up into higher tonnages. A 20
ton is probably not enough. Northern tool makes a 24" press brake die
that they claim will work with a 20 ton press, but they dont specify
thickness. Me, I think 1/8" is gonna be pushing it with this setup-
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_21896_21896
If you are only doing a few, maybe.
Any quantity, and I would be thinking 40 ton press, and heavier duty
dieset.
But its a start, and its only a few hundred for the die.
Bending 1/8" plate, reliably and accurately, in any quantity, gets you
into industrial tools, and industrial prices.
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Posted by Gunner Asch on May 5, 2008, 12:51 am
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wrote:
>The force needed to bend metal goes up by the square of the thickness
>increase.
>This means it takes 4 times the machine to bend twice the thickness.
>
>The $500 16 gage brakes are cheap, overrated (that is, they fudge on
>their stats) chinese imports.
>A decent american made 16 gage brake is closer to a grand.
>
>Imagine needing to build 4 times the machine, to bend 1/8", and you
>start to see why the Chicago D&K machines, made here, are north of 5
>grand.
>
>Cheapest heavy duty manual brakes I know of are the Grizzlys. They
>make a couple of 12 gage brakes that will bend 1/8".
>The G0542, for example, will do what you want, and, at about $1500, is
>a bargain. Just on a per pound basis, its only .88 a lb. You cant buy
>raw steel for that where I live, much less machined, welded, and
>assembled into a brake.
>And its a very flexible tool that will do all kinds of sheet metal
>work.
>
>The other alternative is a cheap press brake die, in a hydraulic
>press. Together, probably similar money, but more suited to production
>bending of just one bend.
>The problem is that 24" of bend gets you up into higher tonnages. A 20
>ton is probably not enough. Northern tool makes a 24" press brake die
>that they claim will work with a 20 ton press, but they dont specify
>thickness. Me, I think 1/8" is gonna be pushing it with this setup-
>http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_21896_21896
>If you are only doing a few, maybe.
>Any quantity, and I would be thinking 40 ton press, and heavier duty
>dieset.
I agree..its gonna be in the 40 ton range.
>But its a start, and its only a few hundred for the die.
>
>Bending 1/8" plate, reliably and accurately, in any quantity, gets you
>into industrial tools, and industrial prices.
Google Ebay for Press Brake.
Dont forget to add rigging and shipping of 10-20,000 lbs
Have it fabbed at a fab shop.
You could copy this and use a couple bottle jacks....
http://cgi.ebay.com/Press-brake-Metal-bender-10-with-lower-V-Die_W0QQitemZ160237361170QQihZ006QQcategoryZ109681QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Political Correctness is a doctrine fostered by a delusional,
illogical liberal minority, and rabidly promoted by an
unscrupulous mainstream media, which holds forth the
proposition that it is entirely possible to pick up a turd by the clean end.
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Posted by limeylew@gmail.com on May 4, 2008, 8:48 pm
Please log in for more thread options > I am looking into a tool that will allow me to bend 6" X 24"(1/8"
> thick) mild steel lengthwise to about 90 degrees.
>
> I'd appreciate any ideas on what I'd need, or possibly a website
> tutorial for this.
>
> Thanks a lot.
>
> Darren Harris
> Staten Island, New York.
You don't say what quantity of parts you need bent but I'm wondering
if you could get sheets of metal, of the size you need and have them
welded together at the appropriate angle?
Lewis.
*****
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>increase.
>This means it takes 4 times the machine to bend twice the thickness.
>
>The $500 16 gage brakes are cheap, overrated (that is, they fudge on
>their stats) chinese imports.
>A decent american made 16 gage brake is closer to a grand.
>
>Imagine needing to build 4 times the machine, to bend 1/8", and you
>start to see why the Chicago D&K machines, made here, are north of 5
>grand.
>
>Cheapest heavy duty manual brakes I know of are the Grizzlys. They
>make a couple of 12 gage brakes that will bend 1/8".
>The G0542, for example, will do what you want, and, at about $1500, is
>a bargain. Just on a per pound basis, its only .88 a lb. You cant buy
>raw steel for that where I live, much less machined, welded, and
>assembled into a brake.
>And its a very flexible tool that will do all kinds of sheet metal
>work.
>
>The other alternative is a cheap press brake die, in a hydraulic
>press. Together, probably similar money, but more suited to production
>bending of just one bend.
>The problem is that 24" of bend gets you up into higher tonnages. A 20
>ton is probably not enough. Northern tool makes a 24" press brake die
>that they claim will work with a 20 ton press, but they dont specify
>thickness. Me, I think 1/8" is gonna be pushing it with this setup-
>http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_21896_21896
>If you are only doing a few, maybe.
>Any quantity, and I would be thinking 40 ton press, and heavier duty
>dieset.