Patent ID: 8900424

Claim:
An electrode for an electrochemical machining process, the electrode comprising: an electrically conductive member defining at least one passage; and an insulating coating partially covering a side surface of the electrically conductive member, wherein the insulating coating does not cover at least one exposed section of the electrically conductive member, wherein the at least one exposed section extends substantially along a longitudinal axis of the electrically conductive member, wherein the insulating coating also does not cover an exposed front end of the electrically conductive member, wherein the exposed front end of the electrically conductive member is less than about 2 mm in height wherein the at least one exposed section comprises first and second exposed sections separated by approximately 180 degrees, and wherein the exposed front end of the electrically conductive member is separated from the first and second exposed sections of the electrically conductive member by a gap h of at least one millimeter (1 mm).