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 263
on this system 252 METHODS OF :MACHIXE SHOP WORK is incommensurate as is the circumference, but the diametersand center distances are always commensurate and, while com-mensurate circumferences have no particular value, commen-surate diameters and center distances are sources of manyconveniences.… … Fig. 254.—Principle of the formed tool system of s;ear cuttirifj. Of these the oldest and most widely used is the formed-toolsystem, of which the principle is illustrated in Fig. 254. The tool,which might be, and sometimes is, a planing tool as shown atthe top of the illustration but which, in the…
Machine-shop practice
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