The practical metal-worker's assistant : comprising metallurgic chemistry, 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, Scoffern, Clay, Fairbairn, and others (1872)
Byrne, Oliver · Philadelphia : H.C. Baird · leaf 409
o teeth like a countersink ; the rose-bit, when it has plenty of oil, and but very little to remove, will be found to act beautifully, but this tool is less fit for cast-iron than the bit next to be described. The rose-bit may be used without oil for the hard woods and ivory, in which it makes a… … 411. The drill, Fig. 409, is much employed, but especially for cast- iron work ; the end of the blade is made very nearly parallel, the two front corners are ground slightly rounding, and are chamfered, the chamfer is continued at a reduced angle along the two sides, to the extent of about two…
Metal-work · Electrometallurgy · Metallurgy
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
