The standard covers:
“Engineers Edge ANSI B92.1 spline calculator” – This site provides the formulas without hosting the copyrighted PDF. ansi b 92.1 pdf 38
It seems you are looking for information from (likely the standard for Involute Splines and Inspection ), specifically page 38 of that PDF. The standard covers: “Engineers Edge ANSI B92
Many websites offer "free PDF downloads" but violate copyright laws or distribute low-quality scanned copies with missing pages (often missing page 38!). To get a legitimate, complete document: ansi b 92.1 pdf 38