Drilling of hardened plate

[spieagle]

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.

 

[Metalfixer]

Information on diameter of holes, tolerance on diameter and location, length and width of plate would be helpful.

 

[ornerynorsk]

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.

 

[dvd]

You were given some good advice several months ago regarding triangular holes, much of those suggestions still hold.

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