Methods of machine shop work : for apprentices and students in technical and trade schools (1914)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York : McGraw-Hill · leaf 179
is shown in Fig. 144 which illustrates aheavy turret lathe by the Niles-Bement-Pond Company. Inthis case the tool for boring a gear blank is inserted in the middleof the pilot bar which, fitting a suitable bush in the work-holdingchuck, is much more favorably supported to resist the strainsupon it…
Machine-shop practice
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