[Terry C]

I don't know why that pic turned sideways
it wasn't when I took it
Sorry
The machine is a sinker EDM. There was no prize
for a correct guess. For anyone reading that's not
A tool maker a sinker uses an electrode
to "burn" away metal. You machine the electrode
to whatever shape you want. So let's say you
you want a hex on the ID of a shaft one inch deep
this would be the machine you could use.

Terry