Thomas, Hugh Kerr · New York : McGraw-Hill Book Co. · leaf 62
an a (62) /? = 7i{d + 2xo) THE WIDTH OF THE WORM WHEEL 49 when g is the total length of the worm = n^P 2Xo = 2X.3183 P-.6366P (63) Hence the equation becomes 360 g tan a (64) ^~;r(d + .6366P) In Fig. 21 the cross-section of the worm wheel is shown. Itwill be observed that the ^ width of the wheel… … Fig. 21. Each dimension may be expressed as the chord of the angle ^measured at different radii. The radius of the pitch line d d being - that of the root of the teeth ^ + k. Sufficient thickness of metal must be left in the rim to prop-erly support the teeth of the wheel as in the case of a spur…
Gearing, Worm
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