Thomas, Hugh Kerr · New York, McGraw-Hill Book Company, Inc.; [etc., etc.] · leaf 62
0^ tan a (g2) P = 7:{d + i:So) THE WIDTH OF THE WORM WHEEL 49 when g is the total length of the worm = nP 2Xo = 2x.3183 P = .6366P (63) Hence the equation becomes 360 g tan a (64) ^ nid+.63mP) 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/? measxired at different radii. The radius of the pitch line being - that of the root of the teeth ;;-|-«. 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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