The book discusses the technology of contact-erosion diamond grinding. Physical essence of processes of diamond contact-erosion grinding, profiling and straightening of tools from superhard abrasives is described. Recommendations are given for selection of electrical and mechanical processing modes to achieve the highest productivity, accuracy and quality of processing. The design of power supplies, technological equipment and the principles of modernization of grinding equipment are given. The issues of economic efficiency of technology implementation are highlighted. The book is intended for engineers engaged in abrasive and electric erosion processing.