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Two Kinds of Straightness Tolerance - 1994 (#2)

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

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There are two kinds of straightness tolerance – (1) Straightness of an axis or center plane [Y14.5M-1994 Para. 6.4.1.1.1] and (2) surface straightness [Fig 6-2]. The type of straightness is determined by the placement of the feature control frame.

When the feature control frame is next to the size dimension, it is controlling the axis or …

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