DATUM CALLOUT
DATUM CALLOUT
(OP)
When 2 surfaces are to determine one datum plane, how is it called out on a design drawing? The two surfaces are in line, but interrupted by a rib (wall). Could I put a Datum A Symbol with "2X" or "2 SURFACES". Datum targets? Is there more than one solution. I understand an extension line is not acceptable for GD&T. Material is MIM (Metal Injection Molding).
Thank you.
Thank you.





RE: DATUM CALLOUT
Assuming it is Y14.5-2009, fig. 4-23 is what you probably need to look at first.
Datum targets can also be used, but I would use them only if some portions of the interrupted surface are acting as datum features.
RE: DATUM CALLOUT
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: DATUM CALLOUT
RE: DATUM CALLOUT
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: DATUM CALLOUT