SCREW GEARS (Crossed Helical Gears)
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SCREW GEARS (Crossed Helical Gears) - 2

Table 7-1 presents equations for a profile shifted screw gear pair. When the normal coefficients of profile shift is given by the expression: x > n 1 = x > n 2 =0, the equations and calculations are the same as for standard gears. Standard screw gears have relations as follows: W W > t T = W tan B ( 7-8 )where d > w 1 = d > 1 , d > w 2 = d > 2 ( 7-7 ) > T = axial thrust load, and > t w 1 = B > 1 , B > w 2 = B > 2 W = transmitted load. The direction of the thrust load is related to the hand of the gear and the direction of rotation. This is depicted in Figure 7-3a Figure 7-3b 7.3 Axial...

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