"Bob La Londe" wrote in message
...
I need to put a smooth finish on the inside of some aluminum tube. 1"
ID smallest - 2" ID biggest. Same application different sizes. If it
was steel or cast iron I would just run a brake hone or cylinder hone
down it, but I think the stones would just pack up with aluminum if I
tried that with this. It doesn't need to be precise, just smooth. I
want to round off the weld seam (not to bad to begin with) and make it
fairly shiny inside. Flap wheels? Buffing wheel with a "course"
substitute for rouge? Other?

Ok shiny was probably not the best term. Smooth is more important. It will
have a low pressure pneumatic seal with am o-ring and piston. The raw tube
works ok, but I was thinking with a better than mill finish the o-rings
might last longer.

So far I have not worn out an o-ring with the existing units, but I would
like to make future ones "better."