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
12.73 12.96 13.19 13.42 270 PUNCH PRESS TOOLS PUNCH AND DIE ALLOWANCE FOR ACCURATEWORK In the blanking, perforating and forming of flat stock in the powerpress for parts of adding machines, tj-pewriters, etc., it is generally-desired to make two different kinds of cuts with the dies used. First,to… … Punch
Machine-shop practice
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.
