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  1. Jay8833

    Concentricity with common axis A-B?

    Hey there guys, I need some advice here. Setting aside for a moment whether or not concentricity is the correct callout.. (this drawing is to the 2009 standard) Can Concentricity be used this way in the 2009? I was expecting to see A-B in the Concentricity datum A FCF, as well as the Ø12 FCF...
  2. Jay8833

    Datum target relationship to features

    Loving this forum and the great info you all share! I have a question regarding Datum Targets. In the 2009 standard, Fig 4-47 shows datum target points A1-A3 on different planes. How exactly are the four holes related to the Datum A target points? They wouldn't be perpendicular if A1-A3 are...

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