ArcAir/Carbon Arc Torch...cutting pix??? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 05-15-2005, 01:06 AM   #1 (permalink)
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ArcAir/Carbon Arc Torch...cutting pix???

Anyone have any pics cutting mild thickness plate....I am interested in the resulting cuts of these setups..........


Powerplant will be a lincoln buzzbox AC 225, is this feasible for 1/4 mild plate?
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Old 05-15-2005, 01:11 AM   #2 (permalink)
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ArcAir

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Old 05-15-2005, 01:18 AM   #3 (permalink)
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I use them at work all the time(big fab shop) but we use them to cut out the backsides of welds for 100% pure welds or to cut out porosity or slag inclusions. I can think of a few things better than an air arc to cut metal with. BTW Ive never seen the first pic, we have whats in the 2nd pic. We have DC machines for stick and air arcing.You can get some really clean cuts with minor grinding to get all the slag off IF you know what you're doing. But like I said, for 1/4", theres better alternatives.
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Old 05-15-2005, 01:23 AM   #4 (permalink)
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Harbor Freight has an inexpensive plasma cutter that everyone seems to have good things to say about...search.
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Old 05-15-2005, 01:27 AM   #5 (permalink)
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It takes a knack to operate an air-arc cutter. I think it would work, but you might be giving up some cleaness. Do you have a torch kit. I would get one of those before I would get a HF plasma. (and a am a HF addict)
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Old 05-15-2005, 01:32 AM   #6 (permalink)
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yeah i am in no market to spend money on a plasma cutter, so i am just looking at other options, also i have found that people are using cutting or chamfer rod to make cuts....i am just trying to see what the resulting cut would look like and if this is something that could be useful.
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Old 05-15-2005, 01:44 AM   #7 (permalink)
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Im not allowed to take pics at work(legal reasons) but if you want it to bevel plate quickly or take a majority of a big globby weld off to grind flush it will work but I wouldnt suggest it on such thin material like 1/4". are you wanting to cut out shapes(with curves) or just straight lines? They wont work well for curves because you would have to manuvure(sp?) the torch to keep the air blowing behind the cut and you would have to make several cuts unless you want to waste carbons by trying to cut it all at once.

1/4" is thin to me because at work almost nothing is less than 3/8".
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Old 05-15-2005, 02:09 AM   #8 (permalink)
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abasive wheels is what i normally use for for striaght cuts, but i need to cut curves sometimes and its a real pain in the butt to shape things with a grinder......
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Old 05-15-2005, 04:20 AM   #9 (permalink)
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What you need is a regular torch

Air arc rods are expensive

They require a large amp and duty cycle welder

Plus a large air compressor to keep up with them

It is very loud to operate so you would not get away with using them at your home


I don't know of anyone that uses this method for cutting shapes out of plate
Most will use it to cut out welds and bevel large plates

I used on like in the second pic everyday for years but have never seen the one in the first pic. I can tell you that it takes some time to learn how to do perfect cuts and not spend all day grinding
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Old 05-15-2005, 06:57 AM   #10 (permalink)
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Quote:
Originally Posted by 4x4extreme
What you need is a regular torch

Air arc rods are expensive

They require a large amp and duty cycle welder

Plus a large air compressor to keep up with them

It is very loud to operate so you would not get away with using them at your home


I don't know of anyone that uses this method for cutting shapes out of plate
Most will use it to cut out welds and bevel large plates

I used on like in the second pic everyday for years but have never seen the one in the first pic. I can tell you that it takes some time to learn how to do perfect cuts and not spend all day grinding
I totally agree. Just buy a Oxy-Ace Torch kit they are not that expensive. You can probably find a used one for even cheaper. I almost prefer torch cutting to plasma because it can be portable with smaller bottles.
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Old 05-15-2005, 01:29 PM   #11 (permalink)
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how clean of a cut can be had with a Oxy-Ace Torch?

sounds like i just need to own up and buy a plasma cutter, though i would prolly not use it enough for it to pay itself off.........

I have you guys ever heard of anyone renting plasma cutters.......?
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Old 05-15-2005, 02:04 PM   #12 (permalink)
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oxygen & acetylene cutting just takes a little practice and you will make clean cuts

If you cant cut with o&a you will not be able to cut much better with plasma

tips for O&A cutting
right tip size
clean tip
proper settings of the regulators
and the right travel speed


It all takes some practice

I would rather use O&A for cutting anything 1/4" and over but I worked for years as a fabricator and got to be good with a torch
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Old 05-15-2005, 03:01 PM   #13 (permalink)
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Get a torch and practice. You can do amazing things with a torch. Oh, and while you are buying stuff, get rid of that AC farmer welder. Carbon-arc does have the advantage of working with stainless. BTW, where the hell did you find that thing in the first pic?
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Old 05-15-2005, 03:05 PM   #14 (permalink)
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Here is the thing in the first pic I don't think it is for cutting but I have never seen one

http://www.mylincolnelectric.com/Cat...et.asp?p=20690
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Old 05-15-2005, 05:41 PM   #15 (permalink)
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The key to using O&A is a proper size tip and keeping it clean so you can see the oxy stream when you hit it. For 1/8 or less, sure, plasma. But anything over and way above O&A is your friend.

Arc air gouges are as expensive if not more than torches. You can get a decent torch cheaper than an arc air.


5" cut, thats a 5" grinder sitting on top.
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Old 05-15-2005, 05:48 PM   #16 (permalink)
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holy sh*t thats some thick plate...well thanks for all the help..i will shortly being picking up a o&a torch
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Old 05-16-2005, 12:05 AM   #17 (permalink)
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Good choice, I also forgot to mention that using an air arc in a small environment(garage or sideyard) would catch a lot of shit on fire REALLY quickly. The thing throws molten metal around with the air pressure.
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Old 05-16-2005, 11:57 AM   #18 (permalink)
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that could be fun......
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Old 05-16-2005, 01:18 PM   #19 (permalink)
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HeyBeerMan has an air arc at his shop. It's useful in some regards, but not for cutting plate, I'd imagine. I helped one of his best tech guys use it to cut a bunch of slag off my broken Runner frame. It worked like a champ, but it's not an easy tool to use, it's expensive, it's LOUD and created a scary amount of spark and blowback.

Agreed that an o/a torch would be your best friend.
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