Hard machining


The technology at a glance.

  • At Stelter, feather key grooves for gears can be eroded to a diameter of 1,400 mm.
  • Loading and unloading is fully automated, enabling “unmanned” production for several shifts and beyond.
  • The advantages of EDM are demonstrated in aspects such as in hard lathing pre-preparation, since the bore hole is still round and uninterrupted, and in the precise production of feather key grooves, despite possible warpage during the heat treatment.