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7/26/2019 Gear Failure Analysis Summary Notes
1/2
Refer to Graph
Spur Gear Bending Stress
Pitch Diameter , Dp=
Cmc{1
uncrownedteeth0.8 crowned teeth (S24 )
F
10d0.025
F
10d0.0375+0.0125F
F
10d0.1109+0.0207F0.000228F2
|
Cpf=
**d &F must be in US customary units (in) (S24)
F10d
for F
10d
7/26/2019 Gear Failure Analysis Summary Notes
2/2
Spur Gear %ontact Stress (itting resistance)
+=costsint
2mN
m
m+1) e-ternal.ear
mN="oad sharin.ratio (1 forspur .ear )
/c=Cp&tKoK!KsKmdpF
Cf+
Cp=elastic coefficient(S1314 )
dp=pitch diameter of the pinion (mm)
Cf=surfacecondition factor ( nt esta*lish t)Cf=