Based on the fixed-end beam calculation. Anticipates that the total circumferential force can be carried by only one tooth.
Allowable load
F all = π c b m en ζ m en ≥ F t
where:
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c = 0.065 σ Ab |
tooth allowable stress in bending [MPa, psi] |
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σ Ab |
allowable stress in bending (material property) |
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b |
tooth gearing width |
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m en |
normal module at end (normal diametral pitch at end inverse value) |
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width factor |
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where: |
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K = 1.4 for straight teeth, 1.25 for helical teeth |
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F t |
circumferential force acting on the gearing |
Safety factor
S = F all / F t