Agma 21801 Pdf Jun 2026

The AGMA 21801 (AGMA 2015-1) standard defines a comprehensive system for classifying the accuracy of unassembled, individual cylindrical involute gears. It covers:

The older AGMA 218.01 system relied on the concept of "Quality Numbers" which could sometimes be misleading—a single number implied a blanket quality level. The newer standards shifted focus toward specific tolerance levels for individual characteristics (runout, profile, etc.), often measured in microns. This shift allows engineers to specify tight tolerances on profile (for noise reduction) while allowing looser tolerances on lead, depending on the application’s specific needs. agma 21801 pdf

Even with the official document, engineers often make errors: The AGMA 21801 (AGMA 2015-1) standard defines a

: Evaluating the gear's ability to resist surface contact fatigue. agma 21801 pdf