GD&T Tips - Does a Datum Reference Frame Need to be Fully Constrained?

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Does a Datum Reference Frame Need to be Fully Constrained - 1994, 2009, 2018 (#295)

(In accordance with the ASME Y14.5-2018 standard)

(In accordance with the ASME Y14.5-2009 standard)

(In accordance with Y14.5M-1994 standard)

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We’ve seen many discussions about the need to fully constrain a datum reference frame in all 6 degrees of freedom. Questions like: When locating features to each other on a 3D part, doesn’t the datum reference frame need to constrain all 6 degrees of freedom? Is the dimensioning incorrect if all degrees of freedom …

Back to Tips Tip added Oct 2020

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