"carl mciver" wrote in message
nk.net...
"Bob May" wrote in message
...
| The fastest would probably be a broach. The broach would be a single
pass
| solution and would happen in seconds. You'll spend more time swapping
parts
| than the actual work itself. Do backup the joint for more repeatable
| machining.

This one I considered awhile, but all I have is air, arc, and a torch,
no machine tools. If I could secure a chisel in a smaller piece of pipe
somehow, then pound on the inside pipe/broach, I wonder how far it'd get
before I couldn't get it out anymore or broke the chisel.
I think I have a chisel for the air hammer, I'll have to see how well
that does.

I won't be able to get to this idea for a few days, I just had my
shoulder operated on yesterday and the tradeoff with being able to use
both
sets of fingers in more pain. Can't win somedays... All ideas will be
entertained/attempted eventually, depending on how much I can get away
with
doing when the wife isn't here to watch over me!


Sorry to hear about your surgery, and hoping you're doing OK.

Given that you have no machinery, and a proper broach could prove to be
quite expensive, and you have no arbor press with which to push it, here's
an idea that may work, and easily. If you have an air chisel, alter the
end such that it will slide along the desired surface so it will cut flush
with the contact side of the chisel, much like a gasket scraper. If you can
get it started in the right location, the load of the flash against the
chisel might keep it running smoothly along the inside surface such that it
will cut flush. Manipulating the angle of the chisel in the tubing would
help. Unless the flash is extreme, I can't imagine it trapping the chisel
such that you couldn't cut at least half way from each end of the 4" section
of tubing you described earlier. Again, the amount of flash is critical.
Too little and it won't work at all.

Good luck, keep us posted.

Harold