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Combining Circularity and Straightness into Cylindricity
Hi All, hoping to get some clarity in a particular situation on how the tolerance zones are shifting when combining straightness and circularity controls into a single cylindricity frame.
I was tasked with going through and cleaning up some old drawings and now the supplier is saying this change creates a much tighter tolerance and want to requote. Obviously my intention wasn't to make the target harder to hit but easier to interpret, measure, and more inline with the design intent of the feature (bearing surface on a shaft).
Does this greatly change the tightness of the tolerance zones? I figured it would change slightly but I was under the impression that cylindricity is a combination of straightness and circularity.
There is also the strong possibility the supplier is just making this an issue because they want to requote (they have previously claimed that they don't use GD&T, but instead have their own standards haha).