This paper describes a highly efficient deburring technology that employs Whirling Electrical Discharge Machining (Whirling EDM). Whirling EDM was developed because burrs on the backside of smalldiameter holes, such as cross-drilled holes are not easy to remove. Many short circuits occur, due to the design of the compliant tool and the tool’s uncontrollable deflection. Therefore, a feedback circuit was developed in order to increase the probability of normal discharge. In conclusion, normal discharge increased due to the feedback circuit, and Whirling EDM can successfully deburr the backside of small-diameter holes in a highly efficient manner.

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