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Machining Technology
Machining Technology

What is EDM (electrical discharge machining)?

By Adam Neely
Quick answer: EDM removes conductive metal with carefully controlled electrical sparks rather than a conventional cutting edge.

EDM removes conductive metal with carefully controlled electrical sparks rather than a conventional cutting edge.

  1. The workpiece and electrode are positioned in a dielectric fluid.
  2. Electrical discharges erode tiny amounts of metal.
  3. The process forms intricate details in hard conductive materials.
  4. Wire EDM and sinker EDM serve different shapes and applications.
Good to know: EDM is common in mold-making, aerospace components, and medical instruments where ordinary tools cannot reach.
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