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  1. Andrewk89

    Help Calculating AGMA Pitting Geometry Factor

    I'm using AGMA 908-B89 and trying to calculate "I" for a pair of external spur gears. I can't seem to match the "I" calculation from Equation 4.1 with the values published in the tables in Paragraph 7. For example, 20 deg pressure angle, 0 deg helix angle, equal addendum Np=21, Ng=135. I get...

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