"Actual" tooth thickness is the measured physical size of a single tooth, usually checked with specialized over-pin measurements. "Effective" thickness accounts for cumulative manufacturing errors across all teeth (like spacing and lead variation) to ensure parts still fit together. The Pitch System: Expressed as a fraction (e.g.,
: The standard utilizes various tolerance levels to account for manufacturing variations, including compensations for processing steps like heat treatment. The Effective Variation Concept ansi b 92.1 pdf 38
If you have a specific request or need detailed information from the standard, I recommend purchasing the standard or consulting with a professional who has access to and knowledge of the current version of ANSI B92.1. "Actual" tooth thickness is the measured physical size
: A key concept in B92.1 is the distinction between "effective" and "actual" tooth thickness, which accounts for manufacturing variations such as lead and profile errors. Significance of "Figure 38" or "Page 38" The Effective Variation Concept If you have a
“ANSI B92.1 external spline 38 teeth fillet root”