Metal-work; a handbook for teachers and students (1914)
Adam, Hugh M. [from old catalog], Evans, James Humphrey, [from old catalog] joint author · New York, Longmans, Green and co.; London, E. Arnold · leaf 162
Fig. 123. finished with a flatter is always much smoother than thatleft from the hammer. Round and square punches (Fig. 124) are used to punchround or square holes. Holes obtained by punching through … Fig. 124. red-hot metal have the advantage of not decreasing the sec-tional area of the metal. The bar swells out at the sides, and 10 146 metal-work: leaves the sectional area full, so that the tensile strength isnot diminished. Tongs are of various shapes to suit the different bars orplates. F:g.…
Metal-work
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