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  • Users: dave048
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  1. dave048

    Circular runout normal to datum axis

    We have a barrel shaped part about 20 inches in diameter with a one inch wide flange around the perimeter perpendicular to the barrel axis. The GD&T callout on the flange is circular runout (not total) to the axis of the barrel. In other words perpendicular runout. The shop has been checking...
  2. dave048

    AMS QQ-P-416 history of bake times, carburized parts

    I have a pinion gear made out of 9310. It is carburized and final tempered at 300 deg F (Rc62). Currently the post plate hydrogen embrittlement bake in AMS-QQ-P-416 for this type of part says 23 hours at 275F. I have evidence that this used to be 12 hours. Is that true? and further back in time...

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