A device for electrochemical grinding by removing material from the surface of a conducting workpiece, comprising a conformator tool including two separate members, a first member for a quick attack of a rough shaped workpiece, comprising a support, one front-end of which is shaped as the compliment of the sectional contour to be obtained along the outer periphery of the workpiece, which operates during a first step of the operation; a high electrolyte flow output supply; a high density current electricity source; and the second member is an electrolytic grinder operating at the rear part of the support, for grinding the workpiece to the desired final shape, the rear part of the support constituting a damming bulk for the electrolyte.