What it does: Electrical discharges erode conductive materials without contact.
Key Features:

• Shapes hardened metals like tungsten carbide

• Die-sinking EDM for molds vs. wire EDM for cuts

• Leaves a matte, cratered surface finish
  Why it matters: The only way to machine some superalloys for jet engines.

Science Bit: Works by vaporizing material with 10,000°F sparks!