Ansi B92.2 Pdf |verified| Link

However, there are subtle differences:

Definitions for pressure angle, pitch diameter, and base circle. Dimensions and Tolerances: ansi b92.2 pdf

If you buy the ANSI B92.2 PDF , you generally do not need ISO 4156 for domestic US manufacturing, but you should have both if you are working with global supply chains. If you are a professional engineer specifying parts

While the formulas and tables are mathematical facts, the compiled, reviewed, and published standard is a legal document required for contract compliance. If you are a professional engineer specifying parts for aerospace, automotive, or heavy machinery, you cannot rely on a scanned, watermarked, or pirated copy. A courtroom will not accept a "free download" as a valid specification. In fact, ANSI B92

A common point of confusion is the relationship between ANSI B92.2 and International Standards. In fact, ANSI B92.2 is largely harmonized with (Straight cylindrical involute splines – Metric module, side fit).

Cost estimate: Expect to pay between $75 and $150 USD for a single-user PDF license for ANSI B92.2.