I recently had to fill a 1"ID hole in a 2" dia x 12" long aluminum bar with a solid 1" rod about 2" long.  I couldn't get the parts up to temp with  propane so I swtiched to the oxy/acetylene tanks and it made all the difference in the world.  The aluminum mass really likes to sink away the heat almost as fast as you apply it, so you really need to play the flame over a large area to get the target up to temp.  Once the parts got where they needed to be the H2000 worked a charm, wicked into the joint just like sweating copper pipe.  It's pretty amazing stuff.

   <marv>


 "Ed Anderson" <eanderson@carolina.rr.com> wrote:

Doug, I have not tried that particular brazing job, but I think it would be
much better than just about any other method so far mentioned. However, that
rotor housing is a large mass of aluminum to get up to temperature brazing
temperature, so it would probably take a high BTU torch and perhaps a larger
propane tank (like for the BBQ grill) rather than the smaller bottles. I
would certainly try it on a junk housing first. But, seeing what they did in
the H2000 video with that stuff, I would say it's certainly worth a try.


Ed