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 100
87 HARDENING AND TEMPERING used in milling tool steel pieces. It required 50 per cent less grinding than any standard tool bought in the market and used in the same department on the same grade of steel, but different shaped pieces. If about to adopt this method of hardening you will find it… … Then, when removing the pieces from the oil tank, place them in pan B. The oil will drip off and return to tank A through pipe e in the lower end of the pan. You will find this a very convenient and clean method. Hardening a Thin Cutter. — To harden a milling cutter about inch thick and 5 inches in…
Blacksmithing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
