Thomas, Hugh Kerr · New York : McGraw-Hill Book Co. · leaf 41
eloped thread surface is 28 WORM GEARS shown by the hue AB. the developed pitch hue by the hne AC;T is the torque available at the pitch line. Then the weight W,which can be lifted by T. will be expressed by the equation: T ~ tan (a-f 0) (-1) AAliere (jS is the angle of friction, the reaction… … Fig. 8. or ? = T P [tan (a + <j6)] [cos (a + ^)]T (24) sin (a + ^) (^^^ Messrs. Brown & Sharpe arrive at the same result in a differentmanner. Ignoring friction, they resolve the acting forces asshown in Fig. 8. T (26) (27) wh pn v = ± COS y hence » = T sm 90 — ;^ PRESSURE ANGLE AND FORM OF…
Gearing, Worm
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