The machinist and tool maker's instructor, containing an easy method of calculating and laying out difficult work in the machine shop .. (1896)
Genung, Edward. [from old catalog] · New York [Press of J. B. Savage, Cleveland] · leaf 147
figure 12he face is marked 1^; then 4.039 — 1.25 = 2.790 nearly. In figure 14 I have shaded an angle A O C for the purpose>f showing the method of finding the smallest pitch diameter>f any mitre or bevel gear. We have found the center angle on the cone pitch line to>e 21° 48, and as the… … V-prrtiyryy& CO * <IV7>, )),«#«*& 7tf0 THE MACHINIST AND TOOL MAKERS INSTRUCTOR. 143 and twice this = 2.072 for the smallest pitch diameter of thepinion. 2.072 X 3.1416 = 6.509 for the circumference, and,divided by twice the number of teeth (24) = .2712, for thethickness of the cutter…
Machinery
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