Three New AGMA Publications
AGMA is pleased to announce the publication of three new documents: AGMA 923-C22, Metallurgical Specifications for Steel and Cast Iron Gearing, written by the AGMA Metallurgy and Materials Committee, AGMA 929-B22, Calculation of Bevel Gear Top Land, Slot Widths and Cutter Edge Radii, written by the AGMA Bevel Gearing Committee, and AGMA 955-A22, Guidance for Industrial Gear Lubrication written by the AGMA Lubrication Committee.
AGMA 923-C22
AGMA 923-C22 begins with an extensive definitions clause specific to gear metallurgy, then defines acceptance criteria for various metallurgical characteristics to meet three quality grades. These quality grades are used in multiple other AGMA standards to define gear performance.
Work on the first edition of AGMA 923 began in 1993 with the goal of consolidating AGMA metallurgical specifications into one document. Through much discussion and consensus building the first edition was published in the year 2000. A second edition with only minor changes was published in 2005. In 2013 the work on this current, third edition, began. This current “C” edition of AGMA 923 has extensive updates from previous editions that took hard work and many meetings for the committee to hash out. It has been developed to be consistent with ISO 6336-5:2016. It has an expanded reduction ratio calculation methodology. Metallurgical tables have been updated to list requirements sequentially, add chemistry and cleanliness requirements, footnotes were reworded and renumbered for uniformity, and new metallurgical tables were added for gray cast iron, ductile iron, and austempered ductile iron.
AGMA 929-B22
AGMA 929-C22 provides a set of equations, integrated from various publications, to calculate bevel gear top land, slot widths, and cuter edge radii. It is intended to aid in completing calculations for gear capacity in ANSI/AGMA 2003, Rating the Pitting Resistance and Bending Strength of Generated Straight Bevel, Zerol Bevel and Spiral Bevel Teeth.
