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  1. ph63915

    Part marking on a Aerospace pump rotor

    I am looking at replacing a nitrided steel pump rotor and it has an interesting couple of laser etched pieces of text upon it. One is an M inside a circle which I believe means it is part of a batch of parts that have been subject to Magnetic Particle inspection although if someone could confirm...
  2. ph63915

    Identifying a spline

    Help, I am trying to identify an involute spline by measurement on a Klingelnberg machine. Accuracy is very important and the data suggests a close to standard 40teeth 40/80 fillet root, side fit spline, however either there is a profile error in the spline or it has a pressure angle of around...

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