The practical metal-worker's assistant : containing the arts of working all metals and alloys, forging of iron and steel, hardening and tempering, melting and mixing, casting and founding, works in sheet metal, the processes dependent on the ductility of the metals, soldering, and the most improved processes, and tools employed by metal-workers, with the application of the art of electro-metallurgy to manufacturing processes : collected from original sources, and from the works of Holtzapffel, Bergeron, Leupold, Plumier, Napier, and others ... (1851)
Byrne, Oliver · Philadelphia : H.C. Baird · leaf 330
possessradial sides, and when these are connected by a curved line, as inFig. 404, there is less risk of accident in the hardening. The numberof the notches increases with the diameter, but the annexed figure SCREW-TOOL CUTTERS. 325 would be better proportioned if it had one or two less notches,… … will be given in the succeeding section ; the tool is then fixed in thevice, and the die-stock is handed round, as in cutting an ordinaryscrew. When Fig. 405 is used for cutting up screw tools, or thechasing-tools for the use of the turning lathe, the cutter is thencalled a hob, or a screw-tool…
Metal-work · Electrometallurgy · Metallurgy
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