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.