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Should the bevel gear pair not have any axial shift, then the coefficient C is 1, as per Figure17-7. The tooth profile factor, YF, per Equation (17-31) is simply the YFO This value is from Figure 17-8 or 17-9, depending upon whether it is a straight or spiral bevel gear pair. The graph entry parameter values are per Equation (17-32).
    YF = YFO                                 (17-31)
                  (17-32)
where: ha = Addendum at outer end (mm)
          hao = Addendum of standard form (mm)
           m = Radial module (mm)
   The axial shift factor, K, is computed from the formula:
  (17-33)

17.3.3.C Load Distribution Factor, Ye
    Load distribution factor is the reciprocal of radial contact ratio.
   Y
e =                                             (17-34)
           
ea       
   The radial contact ratio for a straight bevel gear mesh is:
(17-35)


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