Electro-discharge machining is a processing method that is mainly used for hard metals, or is a processing method that is difficult to process using conventional techniques. EDM usually works with conductive materials.
Advantages of EDM Machining
1) Complex shapes can be produced while it is difficult to be machined by conventional Machining
2) Extremely hard material can be cut with tight tolerance
3) Good surface finish can be obtained
4) The part can be machined without perceivable distortion, because there is no direct contact between tool and work piece
Disadvantages of EDM include
1) High power consumption
2) The removal rate of material is very slow
3) Due to electrode wear, it is difficult to reproduce sharp corners on the workpiece
4) Excessive tool wear occurs during machining
