Production. M-4 tanks. Arthur Hale, tool maker with the American Locomotive Company for forty years, is shown upsetting a reamer as part of his successful method for saving time and tool loss. The reamers used in producing combat tanks at the company's Schenectady, New York, plant, work to such close tolerances that they can be used for only a few holes. They could not be ground and still maintain the size of the hole. Mr. Hale gets many reuses with each reamer by annealing them, upsetting their cutting edges, retampering them and grinding them to size