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Basic Dimensions (#182)

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

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The Y14.5 standard tells us that the tolerance on basic dimensions is indirect, Section 1.4(a). The tolerance is not on the basic dimension. The tolerance is on the feature whose ideal size, form, orientation and or location is defined with the basic dimensions. That’s why we call the frame containing the geometric tolerance the "feature …

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Back to Tips Tip added Mar 2005