Greetings, Just the basics that Jody drills in us (which is most appreciated), Arc length, any more that the diameter of the tungsten is like cutting back on the amperage, gets cold and erratic. My problem is I keep too short of an arc at times.. (aka. I sharpen a lot of tungsten...) Re-grind any co...

I built one out of an old 1/2 ton window unit air conditioner. A $30 ag pump is 40psi @1.2 gal/min. Stripped out the compressor (Freon was already loooong gone) connected the front coil to the back coil with tubing and hose clamps. Connected the output of the ag pump to the cold torch input. connect...