Dear Friends,
Please tell how can i drill a 12 mm thick hardened Steel PLate. Tell me the type of drill machine i should use, i have to drill around 200 holes to make a perforating die.
Thank you for any help.
Use annealed die steel of a type that will match your end use, and harden it AFTER the machinign is done. This is how it's done. You can EDM pre-hardened blanks, but this can be rather costly given the number of holes needed.