Disadvantages of EDM include: Difficulty finding expert machinists. The slow rate of material removal. Potential fire hazard associated with use of combustible oil based dielectrics. The additional time and cost used for creating electrodes for ram/sinker EDM. Reproducing sharp corners on the workpiece is difficult due to electrode wear. Specific power consumption is very high. Power consumption is high. "Overcut" is formed. Excessive tool wear occurs during machining. Electrically non-conductive materials can be machined only with specific set-up of the process. (2010). A recast layer is formed at the cut surface due to melting of the material by the arc.
Disadvantages of EDM include: Difficulty finding expert machinists. The slow rate of material removal. Potential fire hazard associated with use of combustible oil based dielectrics. The additional time and cost used for creating electrodes for ram/sinker EDM. Reproducing sharp corners on the workpiece is difficult due to electrode wear. Specific power consumption is very high. Power consumption is high "Overcut" is formed. Excessive tool wear occurs during machining. Electrically non-conductive materials can be machined only with specific set-up of the process. (2010). A recast layer is formed at the cut surface due to melting of the material by the arc.