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Old 01-11-2012, 09:07 AM
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Bending Flat Bar

Any of you gentlemen out there have a quick way to form 2"x1/8" flat bar into a circle? I need to make a ring to fit my CO2 tank into on my welding cart. It is a Harbor Freight cart and I never liked their chains on the cart for holding the tank in place.

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Old 01-11-2012, 09:28 AM
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torch and something to bend it over/around

it doesnt need to be round to hold the bottle
you can use flat that hits/touches the bottle on 2-4 sides
thats all i have, and a rubber bungi cord (so it doesnt rattle, not to hold it in)
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Old 01-11-2012, 11:18 AM
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This may sound a little low-class, but I recently had to make a new Transmission Tunnel/Cover, and I used one of these to get my contour right, using 1" X 1/8" flat strap-it worked great-you could do 2" by reversing it-

http://www.harborfreight.com/gear-dr...ler-36790.html
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Old 01-11-2012, 11:37 AM
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Quote:
Originally Posted by Cars66cyclone
Any of you gentlemen out there have a quick way to form 2"x1/8" flat bar into a circle? I need to make a ring to fit my CO2 tank into on my welding cart. It is a Harbor Freight cart and I never liked their chains on the cart for holding the tank in place.
This may sound simplistic but why not just bend it around the CO2 tank?
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Old 01-11-2012, 01:07 PM
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Bending flat bar

A old guy showed me this, put it on a flat solid surface the cement floor will work. Take a ball peen hammer, bigger one, starting in the middle just start hammering, you will be surprised at how fast and quick it goes into a circle, as you hammer you work your way to the ends.

I learned that 30 years ago, and I still have the first one I did, that was S/S, hanging on the wall.

Bob
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Old 01-11-2012, 02:11 PM
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Quote:
Originally Posted by 35terraplane
A old guy showed me this, put it on a flat solid surface the cement floor will work. Take a ball peen hammer, bigger one, starting in the middle just start hammering, you will be surprised at how fast and quick it goes into a circle, as you hammer you work your way to the ends.

I learned that 30 years ago, and I still have the first one I did, that was S/S, hanging on the wall.

Bob
I have done this on the vise, with the jaws open about 2" - 4"
its just not very pretty without a lot of work
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Old 01-11-2012, 02:33 PM
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1/8''? i'd just wrap it on the tank, or a smaller tank.
it will bend real easy
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Old 01-11-2012, 02:41 PM
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Quote:
Originally Posted by ogre
1/8''? i'd just wrap it on the tank, or a smaller tank.
it will bend real easy
piece of cake
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Old 01-11-2012, 03:11 PM
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Quote:
Originally Posted by Cars66cyclone
Any of you gentlemen out there have a quick way to form 2"x1/8" flat bar into a circle? I need to make a ring to fit my CO2 tank into on my welding cart. It is a Harbor Freight cart and I never liked their chains on the cart for holding the tank in place.

Since just bending a piece of 2"x1/8" is so simple I am assuming you mean bending it NEATLY which is not as simple as it sounds. Pounding on it with a hammer, either on a concrete floor or over a vise, will certainly yield a circle but it may be a bit crude looking. To do this as neatly as possible I would suggest you bend it cold because heating it with a torch will almost certainly result in uneven bends or even kinks unless you could manage to get it heated evenly the entire length but with 1/8" why even bother with heat? The best way would be to wrap it around it around a cylinder, if it's long enough you can hold it by each end and wrap it into a complete circle if that's what you need, just be sure to pull back on it as you bend it otherwise the side opposite the connecting ends will tend to bulge and leave it "egg" shaped.
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Old 01-12-2012, 10:22 AM
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I think, what you want to use is one of these roll formers: http://www.baileighindustrial.com/be...bender-rm7.php

If you read the specs, they say min 10 inch, that's a pretty tight circle.
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Old 01-12-2012, 11:40 AM
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This will work also.
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Old 01-12-2012, 12:53 PM
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Actually one can build that sort of tool to make curves in lat stock..just depends on how much of that work one needs to do if it is needed or not. For one or two pieces form the flat bar around something round works fine..

Sam
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I have tried most all of it and now do what is known to work..
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Old 01-15-2012, 05:36 PM
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bending flat bar

The quickest way is to just wrap it around the cylinder, you should be able to bend the 1"x 1/8" by hand. Another way would be to go to the scrap yard and have them cut you a 1" piece of scrap pipe as wide as you want, cut that across into two parts, get 4 pieces of angle iron cut to size to weld on to the 2 pieces of pipe that you cut in half (at either end) drill holes in the angle iron for long bolts or pieces of all thread to go through get 4 nuts for the all thread. run the all thread through the holes in the angle iron clips on both halves the pipe put the nuts on them and you have yourself a clamp, get a piece of square tubing or angle iron and run this across tour weld cart and put your tank in place with the clamp installed and tack the clamp in place, remove the tank and finish welding out the bracket, when all has cooled down mount your tank, tighten the nuts on the all thread and your ready to go. Hope this helps lowmerc
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