Abstract
Life tests were conducted at three different loads with three groups of 8.9 cm (3.5 in.) pitch diameter spur gears made of vacuum arc remelted (VAR) AISI 9310 steel. Life was found to vary inversely with load to the 4.3 and 5.1 power at the L10 and L50 life levels, respectively. The Weibull slope varied linearly with maximum Hertz contact stress, having an average value of 2.5. The test data when compared to AGMA standards showed a steeper slope for the load-life diagram.
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