The blacksmith's guide : valuable instructions on forging, welding, hardening, tempering, casehardening, annealing, coloring, brazing, and general blacksmithing (1907)
Sallows, J. F. (James Francis), 1865- · Brattleboro, Vt. : The Technical Press · leaf 109
96 THE BLACKSMITH’S GUIDE wrenches. Holes are drilled in ^4-inch machine steel, hand and drop forgings. The holes are just large … Fig. 20. Cap used in Hardening Threading Die. Fig. 21. Tongs used for Holding Threading Die. enough for the small end of the broach to enter. The broach is then pressed down through with a large
Blacksmithing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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