Handbook for machine designers, shop men and draftsmen (1916)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 123
rm at hub, ins. 2E= width of arm at hub, ins. N = number of teeth. P = circular pitch, ins. p = diametral pitch. R = ratio of face divided by circular pitch. A — number of arms.For other cross-sections: P32?(iV-7) Z = SO A n^RjN-y)Sop^A for circular pitch for diametral pitch in which Z = section… … Figs. 13 and 14.—Proportions of hollow arms for large gears. For large arms the designer will frequently prefer a cored section.A satisfactory one is that of Fig. 13, in which major and minor axes ofboth core and arm are relatively as 2 to i. By equating the moduliof resistance for solid and hollow…
Machine design
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