Factory worker upsetting a reamer as part, 1943

January 1943 - Factory worker upsetting a reamer as part of his successful method for saving time and tool loss. The reamers used in producing combat tanks 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. This worker gets many reuses with each reamer by annealing them, upsetting their cutting edges, retampering them and grinding them to size

1940 1949 Clamp Craftsperson Metalwork Precision Reamer Vise

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