Based on the fixed-end beam calculation. Anticipates that the total circumferential force can only be carried by one tooth.
Allowable load
F all = π c min b w m μ≥ F t
where:
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c min = min (c b , c c ) |
minimum tooth allowable stress |
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|
b w |
operating tooth bearing width |
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|
m |
module |
|
| μ |
factor of dependence on the precision degree (table value) |
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|
F t |
circumferential force acting on the teeth |
Safety factor
S = F all / F t
Bending factor
where:
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σ Ab |
allowable stress in bending (material property) |
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|
r b |
speed bending factor (table value) |
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|
y b |
shape bending factor (table value) |
Contact factor
where:
|
σ Ac |
allowable stress in contact (material property) |
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|
r c |
speed pressure factor (table value) |
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|
y c |
shape pressure factor (table value) |
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|
|
size factor |
