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Radial Runout to two Datums (Plane A, Cylinder C) ISO_ASME Difference


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Hello,
I would like to ask for any help with evaluation of radial runout (Dia.85.00) to Datum A, Datum C in two different scenerio ISO/ASME 
I would be grateful if anyone give me a feedback if my measurement strategy setups are OK based on ISO and ASME standards.

have attached measurement strategy.

Thank you for your help

Regards
Lukas

Runout ISO_ASME.pdf

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Don't know why OT plane on ISO.

But i am curious too. I would say for ASME - OT plane, cylinder OT with locked vector and reffered feature plane A

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I have based it from COOKBOOK. Unfortunately, there isn´t an evaluation of radial runout to two datums.
I have only found evaluations of the position for functional check - ISO, ASME.  In both evaluations, the plane is defined as the Outer tangential Plane.

There are also defined the axial/radial runout but only to one datum.

 

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OT plane is correct, but the cylinder needs to be OT (Maximum Inscribed Element in this case) too, and its normal vector has to be constrained to the vector of datum Ref 1 (ISO 5459)

 

I don´t know much about ASME, but as well as I know, it should be the same

 

Greets Jens

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An elegant solution to this is to construct a "perpendicular" using the OT cylinder as feature 1 and the OT plane as feature 2. The constructed perpendicular can then be used as a single datum that functions exactly as the dual datum for any characteristic. Assuming |A| is  plane and |B| is cylinder I call the perpendicular A.B so it makes it easy to understand. The single item A.B will control 5 degrees of freedom, all but rotation about the constructed axis.

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