The Effective Fit Concept as Used in ANSI B92.1-1970, Involute Splines and Inspection (inch and metric)

The effective fit concept for involute splines, as documented in the American National Standard B92.1-1970, is described. The flexibility of the concept is demonstrated, and examples in both English and metric (SI) units of measure are given. The paper reflects the latest (1970) revision to the B92.1 standard, which was developed in the '40s and first published under the designation B5.15.