Thomas, Hugh Kerr · New York, McGraw-Hill Book Company, Inc.; [etc., etc.] · leaf 31
tan a — DdG (8) from which a is ^t once found, and from this the value of n(equation 4). DETERMINATION OF LENGTH OF WORM AND NUMBER OFTEETH IN CONTACT The worm and worm wheel may be regarded as two cylinderswhich cut one another, their axes being at right angles. 18 WORM GEARS In Fig. 3, which is a… … Fig. 3.The total height of the wheel teeth cutting the cylinder of theworm is o +o, and this is also the versin of the angle 2 Therefore, -^r^^ = versm Again, R dc = 2 sin-..the length of dc = 2 i2 sin ^=g (9) Since the teeth of the wheel are hobbed, it follows that everyspace between the worm…
Gearing, Worm
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