Since the introduction of electrochemical machining (ECM) just a few years ago, interest in this process has grown at a very rapid rate. Many papers and articles have been written explaining the nature of the process and how it can be applied to removing metal. This paper briefly reviews how the ECM process works, what its advantages are, and how it can be applied to accomplish various jobs; also, some of the process parameters that affect the dimensional tolerances, surface finish, and metal removal rates that can be obtained by ECM.