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Datum Features Must Be of Sufficient Size (#216)

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

PDF is Available with GD&T Reference Center Subscription.

Datum selection is the most significant aspect of applying GD&T. In section 4.3 of the Standard it says that a datum feature should be of sufficient size to permit its use. Well, the major use of datum features is to arrest or take away the degrees of freedom or movement of a part so that it can be reproducibly inspected.

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Back to Tips Tip added Jan 2008