> I've seen some sort of "electrical disintegration" process that
> was used to disintegrate an outer bearing shell in my Guzzi
> gearbox. Sorry, I don't know the correct terminology or
> even how it works, but it is something that only a shop would
> have. Maybe others on the list could help and indicate
> whether it would work for you.
It's called Electrical Discharge Machining, or EDM for short. I hope to build
one for myself someday, as it sounds like a very handy thing to have when you
need one (imagine being able to machine a hardened steel stud out of aluminum
_without_ harming the threads in the aluminum), but haven't yet.
However it's a very slow process, basically works by drawing a spark from the
workpiece which tears away a tiny bit of metal. No reason it wouldn't work for
a crank pulley bolt, but it would sure take a long time.
Randall
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