We use a different brand than that (ours are Boretech) but very similar. We've been using those machines for about 25 years now. Sure beats welding bores by hand, especially those bores that are too small or long, or in places that you can't see what you are doing. They can so some pretty good tricks to. When welding a bore with a keyway, you can set it up to weld up to the edge of the keyway, stop, index up, reverse direction, weld back around to the other edge, stop, index up, reverse, etc., until the bore is welded, having never stopped the arc. Or, you could weld that same bore skipping the keyway by starting and stopping the arc at the edge of the keyway, all automatically. We use ours almost exclusively in the vertical. It can be done horizontally too, but getting them to do a good job running the weld uphill, overhead, downhill (this is the biggest problem, little penetration) , and flat is a pretty good challenge. We do bunches of slack adjusters off of D10 and D11 dozers with the Bortech. We prep them in the lathe, weld the bores (about 6 5/8" diameter by about 20" deep) rough bore them in the lathe, and finish hone them to size. No imperfections allowed. We must average 4-6 of those a week.
Kim
