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 370
or a slide-rest, wasfound to be very uniform in its thread, and it was used for some timefor the ordinary purposes of turning. When, however, it was requiredto be used for cutting other screws, it was found objectionable thatits rate was nearly nine, whereas it was required to have eight threadsper… … 10 From 9, the screw of 24 inches in length, one of 8 feet inlength was obtained; the thread was cut one-third of its depth,with the wheels, successive portions being operated upon and thetool being carefully adjusted to the termination of the part previously 366 SCREW-CUTTING TOOLS. cut. The…
Metal-work · Electrometallurgy · Metallurgy
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
