If any one needs to build a circle cutter this is a good one. I built it about 25 yrs. ago. I copied one an old weldor had and of course had to make a few improvements as we all do. This one fits a Victor but can be built to fit a Smith. Every thing is stainless except the rod. It was chromed when I built it. I have another rod that screws to this one for bigger circles.
This round was cut from 1/2" plate. I used a 000 tip, 5#A and 35#O for the cut.