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How to Calculate Tooth-profile Factor YFa for Root Stress Calculation

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Rafael Tangari

Mechanical
Apr 24, 2018
1
Hello,

Anyone knows how to calculate the tooth-profile factor YFa (A derivation of Lewis form factor) for gears?

I am using Bosch Automotive Handbook and I have a chart with the tooth-profile factor, which is a function of number of teeth and the addendum-modification coefficient.

In this handbook, they bring an equation, but It is highly complicate to calculate.

I appreciate the support.

PS: I have attached the chart in this thread.

Regards.
 
 https://files.engineering.com/getfile.aspx?folder=53deaf66-ef82-49f6-811b-ce60f0cf2b8d&file=YFA-Calculation.jpg
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