EDM is not at all suitable for mass production. It is very slow and
requires added finishing steps because of the rough surface it leaves
it also requires a highly paid skilled operator to run the equipment.
It is an one way to make dies that can then be used in various presses
to mass produce parts by stamping but not as a mass production tool
itself. If by CAM you mean using a computer controlled milling
machine or lathe to produce parts then it can be used for limited
production but with a very few exceptions it is again not suitable for
mass production because it is slow and requires a highly paid skilled
operator to run the equipment.
There are two main techniques for mass production casting and
stamping any other type of process is way too slow and labor
intensive. So I would look into having your product cast or stamped
if you need mass production.
James Binnion Metal Arts
4701 San Leandro St #18
Oakland, CA 94601