AGMA 15FTM25 PDF

This paper presents the results of several experimental analyses to explore some of the features and methodologies of ISO 15144. A summary of ISO 15144 is first discussed, as is a spreadsheet that has been written, to accept contact stresses calculated from load distribution analyses. Sample load distribution analyses and subsequent ISO predictions are made for several experimental results that are reported in the literature. Following these analyses, a series of experimental durability tests were run using the AGMA tribology gears running with Dexron 6 automatic transmission fluid as the lubricant. An FVA 54 test was run to obtain the lubricant pass/fail level and the permissible value of Lambda needed to calculate the safety factor for micropitting.