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Electrical discharge grinding (EDG) is much like electrical discharge machining except that the electrode (tool) is a rotating graphite wheel. This article commences with a schematic illustration of a setup for EDG wheels and discusses the control operation of the EDG setup. It tabulates typical applications and conditions for the EDG of stainless steels using 300 mm diameter wheels. The article describes the process characteristics of the EDG in terms of applications, surface finish, corner radius, and wheel wear. It concludes with a graphical illustration of the effect of heat in electrical discharge grinding on the surface hardness of various work metals.

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