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Old 01-25-2015, 11:48 PM
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milomilo milomilo is offline
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Default Torch Circle Cutter

Made a circle cutter for the O/A torch. Added a feature that none of the ones I have seen have. It has a roller out at the end of the torch next to the tip that maintains a set distance from the material being cut. I have had the typical ones where you put the cutting tip in a hole but they are often hard to control the tip to material distance causing angled cuts on thicker plate.

The materials used were 18" 1/2 round, two 1" rounds, one 2" 1/4-20 bolt, two 1" 1/4-20 bolts, a #10 fender washer, 2" 5/16-18 bolt, 5/8" nut and a 2" 10-24 screw.

The 1" rounds were drilled through to 1/2" to slide on the 1/2" round. They were drilled and tapped for the 1/4-20 bolts, and the rear one also drilled and tapped for the 2" 1/4-20 bolt with the head cut off the then ground to a 45 degree point to set in the center punched mark at the center of the desired circle diameter.

The 5/16-18 bolt had the head cut off and the threaded end had a hacksaw slot cut for the #10 fender washer. A hole was drilled for the #10 screw as the axle for the fender washer to spin on. The 5/8" nut was drilled to 5/8" fit my Victor tip.

Hopefully the pics will explain better than the words. I did cut 4 12" circles out of 1/8" plate for the grinder today with it. Worked great.
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Old 01-26-2015, 11:05 PM
doubleD doubleD is offline
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I like your roller addition....... I don't remember seeing that on other versions either. It should help in consistent spacing/standoff of the torch and ease in movement through the cut.
Nice project..
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  #3  
Old 01-26-2015, 11:38 PM
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milomilo milomilo is offline
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Quote:
Originally Posted by doubleD View Post
I like your roller addition....... I don't remember seeing that on other versions either. It should help in consistent spacing/standoff of the torch and ease in movement through the cut.
Nice project..
It will do as you say, but my main reason was to able to thick plate and have a consistent 90 degree cut edge.
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Liberty has never come from Government. Liberty has always come from the subjects of it. The history of liberty is a history of limitations of governmental power, not the increase of it.
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Old 01-27-2015, 08:05 AM
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Ironman Ironman is offline
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I bought this torch circle burner a few years back.
Note it says Victor style circle cutter,my mistake, thought it fit a Victor.

Well, I never found a Victor torch it would screw onto. So it sat there shiny and new and useless. I needed a circle burner one day and I thought.....I have a lathe and you are going to work.
So I put the nut from the circle burner into the lathe and cut the threads out to match the Victor threads in my Victor torch, and it works very well now.
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Old 01-27-2015, 08:20 AM
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Chris,
I like the addition of the wheel. I need to make me one also.
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Old 01-27-2015, 12:21 PM
BukitCase BukitCase is offline
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I bought this one shortly after I got the PM45

http://www.flangewizard.com/products140.html

I was gonna make one but didn't think about fender washers for wheels - nice one

The offset trammel point helps with really small circles, as does the 1/4-20 hardware - for smaller circles (the rod is about 16" long IIRC) I just cut the head off a 1/4" bolt and used that for a rod.

I lucked out and got it off Amazon on a one-day sale for just under half of normal price, don't remember exacly how much (around $50).

They're kinda spendy at regular price http://www.amazon.com/Flange-Wizard-...2378761&sr=1-7

If/when I need to cut circles/radii out of thicker than 1", I'll do a bushing that fits inside the 1" for the PM45 torch - I like that the bushing can either lock down or spin in the holder... Steve
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