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 303
lowcarbon steel, case hardened. Thesesectional broaches are made in a varietyof ways. Figs. 2 to 4 showing a fewexamples. In Fig. 2 sections are set inon the side, while in Figs. 3 and 4 thesections are practically disks held on acentral arbor. In some cases seyeralteeth are made on one section.… … Fig.
Machine-shop practice
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.
