JOHN F. KAHLES, retired senior vice-president of Metcut Research Associates Inc., Cincinnati, Ohio, died May 26, 1993. John Kahles was an educator, a metallurgist, an author, a manufacturing engineer, and an industrialist. He played a major role in providing data and information for the manufacturing industry of the United States and the industrial counties of the world.

John was born in Chicago, Illinois, on September 11, 1914. He received a B.S. in chemical engineering from Armour Institute of Technology (now Illinois Institute of Technology) in 1936. He did his graduate work at the University of Cincinnati, where he received a Ph.D. in metallurgical engineering in 1946. During his years at the University of Cincinnati, he was an instructor, assistant professor, and associate professor of metallurgical engineering. In 1951 John joined Metcut Research Associates as a full partner. Metcut Research had been formed in 1948 and was principally involved in metal cutting and machinability research and testing. John had been retained as a consultant to Metcut from its beginning. His earliest efforts were in failure analysis and use of metallurgy in the analysis of machinability and the metal cutting process. A good deal of John's early work was devoted to failure analysis principally in the aircraft industry.

Starting in the 1950s Metcut Research was involved in developing machinability data for a host of new aircraft and aircraft

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