I. About electric discharge machining

"II. How to set machining conditions"

"III. How to design electrodes"

3. Fields for which EDM is utilized

EDM is utilized when no other machining method is available because the machining speed is slow.

The main features are as follows.

  • It can engrave a complex shapes on metals.
  • It can engrave shapes on hard metals


Though it is used for many special fields, the most common field is mold manufacturing.

Mold is models to make plastic parts etc. for cell-phones, TVs, or automobiles in large quantities. From 1,000 to tens of thousands of plastic parts are made with one mold.

Die & mold manufacturing is a strong field of ​​Japan in the world. EDM is the main machining methods of it.