On Thu, 17 Nov 2011 10:30:09 -0800 (PST), beecrofter
wrote:

On Nov 16, 1:52*pm, "Pete C." wrote:
I have a 3/32" HSS bit broken off ~1" deep in a blind hole in a 7075 AL
part, only a tiny stub of the bit is sticking out. Suggestions on how to
remove it without damaging the part?

Thanks,

* * * * Pete C.

Alum is easy to find, commonly sold in 4-5lb boxes/bags in garden
centers to acidify soil. (aluminum sulphate)

Avoid lye it will eat the aluminum.

!!! I learned something. I can get it by the ton at the Co-op. Make a
saturated solution in a bucket and let the part soak. Bet if you used
a metal bucket and a hotplate, the chemical reaction would go real
fast.

Karl