American machinists' handbook and dictionary of shop terms : a reference book of machine shop and drawing room data, methods and definitions (1914)
Colvin, Fred H. (Fred Herbert), 1867-1965, Stanley, Frank A. (Frank Arthur), b. 1874 · New York : McGraw-Hill book company ; London : Hill · leaf 299
Punch … Fig. 15. — Perforating Tools forated in the parts as smooth and straight as possible, and true tosize. The table given is the result of considerable experimentingon this class of work, and has stood the test of years of use since itwas compiled. The die always governs the size of the work passing…
Machine-shop practice
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.
