Parallelism vs Flatness
Parallelism vs Flatness
(OP)
I have two parallel surfaces. One surface is Datum A, the other surface is specified to be parallel to Datum A within 0.001 inches. Is it true that both faces are also guaranteed to be flat within 0.001 inches or do I need to specify flatness separately? See attached picture.
Thanks,
Ryan
Thanks,
Ryan





RE: Parallelism vs Flatness
You have no flatness indicated for the surface indicated -A-. -A- is simplistically derived from the 3 high points of the corresponding surface.
Almost the same question was recently asked over in the GD&T forum recently.
That is a better forum for this type of question.
forum1103: Drafting Standards, GD&T & Tolerance Analysis
KENAT, probably the least qualified checker you'll ever meet...