Archie wrote:

Have noticed several messages in reference
to wire EDM.
There is also the "die sinker" which operates on
the same principle but uses a carbon shaped
positive shape to create a negative effect.
(much used in mold making to create unusual
and compound shapes)
Most well equipped shops have both,
but with the tremendous improvements in
Cad-Cam, many do not.
Archie

 
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