In hole-drilling EDM a hollow, tubular electrode is used to create holes in a workpiece. With this process start holes can be made that are used during wire EDM that function as feed-through holes to cut contours. However, hole-drilling EDM is also ideally suited for creating cooling channels or air ducts, or supply holes for oil or liquids.
Fast, small and deep drilling
During the processing rinse water is pressed through the electrode under relatively high pressure and the residue flushes upwards along the outside of the electrode. Hole-drilling EDM enables you to create very small and deep holes. Holes with a diameter of 1 millimetre in material 600 mm thick are possible. The process is very fast, even through hard material and carbide.