This paper describes machining characteristics of high spindle speed WEDG using the
electrostatic induction feeding method. In this method, non-contact electric feeding allows the
workpiece rod to be rotated at a high speed of up to 50000rpm. Since the temperature rise on the
workpiece surface is low, the material removal rate was two times higher and the surface roughness
was also improved compared to the normal RC discharge circuit where the rotational speed was
1000rpm at the highest due to contact electric feeding using a brush. Furthermore, micro rods thus
prepared were used as tool electrodes to machine micro-holes with the same rotation speed of
50000rpm. It was found that smaller gaps and better straightness can be obtained due to the high
flushing efficiency at the high spindle speed.