Electrolytic grinding this is a modification of the ECM process. The tool electrode consists of a rotating abrasive wheel which can conduct electricity : this is usually a metal bonded diamond wheel. The electrolyte is fed between the wheel and work surface in the direction of movement of the wheel periphery. so that it is carried past the work surface by the wheel rotation. the abrasive particles help to maintain a constant gap between wheel and work. The current flows between work and wheel as show in