Sinker Machining Services

Cer-Mac uses RAM EDM when faced with machining a very small part, a part with very thin walls and with accuracies that are difficult to hold, maintain after heat treating.

RAM EDM uses custom machined electrodes which creates a spark between the material being machined and the electrode. The spark electrode materials in the EDM tools pathway, creating the complex cavities or shapes desired.


  • Max. work tank 30.3” x 19.6” x 9.8”
  • Max. work table 19.6” x 12.7”
  • Max. Table load 1200 lbs.
  • 32 RMS of lower, slower feed rate increases surface finish
  • All conductive material burns, soft or hard including carbide


  • Tolerances of +/- .00015” can be achieved
  • Material hardness does not effect process—Tungsten carbide, Stellite, Hastelloy, Nimonic and Inconel all can be successfully machined by EDM
  • Cutting complex shapes and thin walled configurations without distortion
  • EDM process leaves no burrs

Ram EDM machining

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