Tip.
I used to make PCBs and have a good number of .030" carbide drills. It is very difficult to drill steel with these. A small hole was drilled in a 1/8" cap. The hole was soldered shut and drill with the PCB bit. While not as fast a change as mig tips it is not all that hard to resize the hole.Input flare.
Lost foam casting was used to make the flare. Several Styrofoam cups were stacked to approximate the shape.
The casting was drilled to take the 3/4" pipe which threaded into the
unthreaded drill hole. The inside and outside shape were refined on
the lathe.
The burner is running rich. I may replace the 1/8" pipe cap with something that does not block so much air. It is defeating the cone.
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