Bruce Robbins wrote:
> Chuck's suggestion of using a torch to heat
> the alloy flanges to make separation easier
> raised one or two eyebrows. It was suggested that
> this could make the alloy very brittle if not done
> carefully. A better solution, I was told, would be
> dipping the hub in a hot oil bath.
Boiling oil? Blowtorches? Are the Vikings storming the castle again?
Seriously, a propane torch should work fine if done carefully so you don't heat the aluminum beyond the point where water (or spit) sizzles when it touches the metal. This technique also allows you to heat the part while it's clamped in the vise, instead of worrying about how you'll clamp the barrel while the hub is still hot. You might want to use wood strips between the vise jaws and the flange, so the heat doesn't drain into the vise.
-- Craig Sandvik Berkeley, CA
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