Sinker EDM Terminology & Definition

Sinker EDMSinker EDMSinker EDM, also called “Ram” EDM or “Plunge” EDM, consists of an electrode and workpiece submerged in an insulating liquid such as oil or, less frequently, other dielectric fluids. The electrode and workpiece are connected to a suitable power supply. Relying on spark erosion, this process relies on pressure to form indentations over time.

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