Copper VS Graphite Which Material is Better for EDM Electrodes? - Part 2

February 11, 2022 12:32 pm


Graphite takes the cake. Having worked with both copper and graphite for electrodes, Steve has discovered that graphite is overall more universal and cost effective for EDM work. This part 2/2 of graphite vs copper will explain why. Grab part one here.

The following topics are covered:

  • Results from part 1
  • Steve’s discoveries about each material’s performance
  • Findings from copper tungsten experiment in part 1
  • Why comparing cooper tungsten and graphite can be very difficult
  • Copper and copper tungsten burning carbide
  • Chipping / breaking of electrodes with demonstration on graphite and copper electrode
  • Sucker systems to contain the mess from burning
  • Graphite can support more detailing than copper… why does that matter?
  • Burning ribs in an aluminum insert with graphite
  • How graphite and copper differently affect EDM performance.
    (Higher flow of current through a graphite electrode than a copper electrode). How does this affect cost?
  • Roughing electrodes of graphite vs copper and the given implications.
  • Finishing electrodes of graphite vs copper and given implications
  • Comparison of surface finish in the cavity of graphite vs of copper.
  • What do you want to see next? Share in the comments

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