A handbook on the teeth of gears, their curves, properties, and practical construction (1890)
Grant, George B. (George Barnard), 1849-1917 · Lexington, Mass., Lexington Gear Works · leaf 50
ooth set, 6=27 for athirty-two-tooth set, and so on. If we use the plan previously explained,and calculate by formula (2), we can get agreater value for it, but in that case the ad-dendum is limited to its chosen value. As the addendum is always limited in prac-tice, almost always being unity,… … Stunted Involute that includes gears with less than thirty-twoteeth, if the addendum is unity. It is, however, customary to use the fulladdendum on a set that includes twelve teethwith the result that it must be corrected (?)for interference by rounding over the cornersas in Fig. 27. THE NORMAL…
Gearing
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