Run out question

Good morning all, i have a gd&t question i"m not sure about.
Does circularity come into play when both the feature and the datum are running out together, each in the same direction?
The o-ring groove and datum are both elliptical by .005 but measure within .0003 to each other. Well within the .002 called out.
I feel the parts meet the runout requirement but my coworker's opinion is the .005 measured on circularity puts them out.
Thanks in advance.

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RIDER over 5 years ago

As louisd said, the form (ie. roundness) is controlled by Rule 1 of Y14.5 which states that "the limits of size of a feature prescribe the extent within which variations of geometric form, as well as size are allowed." The 0.005" roundness would suggest that somewhere on the diameter, 2 opposing points violate the diametrical tolerance zone. This is independent of the runout tolerance zone.
HTH
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RIDER over 5 years ago

As louisd said, the form (ie. roundness) is controlled by Rule 1 of Y14.5 which states that "the limits of size of a feature prescribe the extent within which variations of geometric form, as well as size are allowed." The 0.005" roundness would suggest that somewhere on the diameter, 2 opposing points violate the diametrical tolerance zone. This is independent of the runout tolerance zone.
HTH
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