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 300
nd the square tang whereby it is attached to the drilling machine.The cutters are ground at the extreme ends, but they also requirean occasional touch on the oilstone, to restore the keenness of theouter angles, which become somewhat rounded by the friction. Thediminution from the trifling exterior… … 296 DRILLS. rather more commonly and plentifully ; thus oil is used for the gene-rality of metals, or from economy, soap and water ; milk is the mostproper for copper, gold, and silver; and cast iron and brass areusually drilled without lubrication. For all the above-named metalsand for alloys of…
Metal-work · Electrometallurgy · Metallurgy
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