Beale, Oscar James, Brown & Sharpe Manufacturing Company (Providence, R.I.) · Providence, R.I. : Brown & Sharpe Mfg. Co. · leaf 123
ral gear 3 diameter. To find the curvature ofcutter, fit a templet to the blank along the line of thenormal helix, as A E B, letting the templet reach overabout two or three normal pitches. The curvature ofthis templet will be nearer a straight line than an arcof the addendum circle. Now find the… … :Pis. 4G Thus, in Fig. 46, suppose the templet fits a circle3J diameter, if the normal pitch is 12 to inch, dia-metral, the cutter required is for 12 P and 40 teeth.The curvature of the templet will not be quite circular,but is sufficiently near for practical purposes. Strictly,a flat templet…
Gearing
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