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.
Runout is relative to the axial center of the datum. Not the outer face. The runout dimension is a nonconformance.
A datum is not per print either, if it has 0.005" roundness on a 0.003" tolerance. Form is controlled by size if not controlled by any other call-outs.
Runout is relative to the axial center of the datum. Not the outer face. The runout dimension is a nonconformance.
A datum is not per print either, if it has 0.005" roundness on a 0.003" tolerance. Form is controlled by size if not controlled by any other call-outs.
however, if both diameters show they are concentric to each other, you should consider the root cause to be handling/damage, and not manufacturing-related causes.