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4th October 2014

AGMA Releases New Standard on Cylindrical Wormgearing Tolerance and Inspection Methods

      The AGMA Wormgearing Committee recently completed the development of the new standard ANSI/AGMA 2011-B14, Cylindrical Wormgearing Tolerance and Inspection Methods.

      The new standard is a revision of ANSI/AGMA 2011-A98.

      This revision was required to correct a typographical error in equation 18.  The metric edition of this document, AGMA 2111-A98, was not affected.

      AGMA 2011 describes and defines variations that may occur in unassembled wormgearing. It displays measuring methods and practices, giving suitable warnings if a preferred probe cannot be used. The applicability of single or double flank composite testing is discussed, using a reference gear. Tooth thickness measurement is shown using direct measurement as well as the use of measurements over wires or pins. Equations for the maximum variations are given for the stated ranges, as a function of size, pitch and tolerance grade.

      The new standard is available for purchase, in electronic format, on AGMA website, click on the “STANDARDS” button.

      The AGMA Wormgearing Committee wishes to thank all participants for their valuable contributions during the development of this new standard.

      To find out how you can get involved with any of the AGMA committees which actively serve the industry, contact Headquarters at for details.

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