For rating spur and helical gears, the current standard is ANSI/AGMA 2001-D04 (R2016) , Fundamental Rating Factors and Calculation Methods for Involute Spur and Helical Gear Teeth . For the geometry factors, you should use AGMA 908-B89 , Geometry Factors for Determining the Pitting Resistance and Bending Strength of Spur, Helical and Herringbone Gear Teeth .
): Adjustments made for the effects of speed, vibration, and manufacturing inaccuracies. Load Distribution ( Cmcap C sub m agma 21801 pdf