Machine drawing, a practical guide to the standard methods of graphical representation of machines, including complete detail drawings of a duplex pump and of a direct-current generator (1920)
Griffin, Charles Lewis, 1867- [from old catalog], Adams, Charles Clyde, 1882- [from old catalog] joint author · Chicago, American technical society · leaf 58
h standard propor-tions of teeth. If the drawing were made exactly as the gear wouldlook, it would be necessary to spend a large amount of time inkingin the outlines of the 72 teeth around the circumference of the gear; MACHINE DRAWING 47 instead of doing this, the pitch line of the gear is shown,… … GEARCUT 72T.-1.D.P. INVOLUTE:ONE- C. /. Fig. 39. Detail of Gear with Split Hub The information which enables the workman to choose the propercutter is given in the title; thus, Cut 72 Teeth—1 Diametral Pitch—Involute. The workman will receive from the tool room a stand-ard involute cutter marked…
Machinery
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