This paper will compare and contrast two newly revised documents. IS0 6336-5 and AGUA 923, with two that are
familiar to today’s gear producers -AGMA 2001 and 2003. These new documents were prepared on a consensus basis for
big gears, little gears, high production, one-of-a-kind gears, and everything in between. A short history of the long
evolution and the logic behind the new documents ispresented. This paper discusses what’s new, what’s different, what’s
clarified, what’s the same, and what’s hidden in the footnotes. The observations are presented from the viewpoint of a
gear metallurgistbeat treater – one who has a long and active record of participation in the preparation of these
documents. Knowing the differences will be important to the users of these new documents. Weil thought out practical
consistency was the goal. Was it accomplished? This paper recommends working according to the requirements and
recommendations of the new documents. The ultimate goal of this paper is to get the questions and feedback known to the
preparen of the next generation of documents, so that there will be more consistency between the documents the next
time.

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