Sinker EDM // This type of EDM – also referred to as die sinking – is designed to create blind pockets, where a hole doesn’t go all the way through the material. The electrode is formed in the desired shape of the cavity to be created in the metal. The electrode is slowly lowered (or sunk) into the workpiece, eroding material until the cavity is created. Sinker EDM is used to create complex shapes, such as those needed for making molds, dies and other types of tooling.
Hole Popper EDM // A rotating tubular-shaped electrode is used to cut deep, small-diameter holes through the entire thickness of a conductive metal. It functions like a drill bit, except that an electrical spark is used to quickly and accurately cut these holes in the workpiece. This type of machine is sometimes used to create a starter hole for wire EDM to use to begin a cut.
