ISO 6336 Pitting Resistance: The Complete $S_H$ Calculation Walkthrough
A complete, factor-by-factor derivation of the ISO 6336-2:2019 contact safety factor $S_H$ — including $Z_B$/$Z_D$, $Z_NT$ for long life, the $Z_W$ asymmetry, and the three calculation errors that appear in practice. Method B, external cylindrical gears.