In this instance, the derived maximum straightness tolerance is the specified tolerance median plane shall lie in a tolerance zone between two plus the amount the actual local size of the feature departs parallel planes separated by the amount of the tolerance. basis to width features of size, and the tolerance value may be greater than the size tolerance the boundary of perfect When applied on an MMC basis, as in Figure 8-4, the form at MMC does not apply. Flatness may be applied on an RFS, MMC, or LMC on the feature. of the MMC size and form tolerance produces a VC, OB, or IB resulting from the form tolerance but does not affect the 8.4.2.1 Application of Flatness RFS, MMC, or LMC to IB or OB created by any orientation or position tolerances Width. The collective effect may be larger than the size tolerance. ASME Y14.5-2018 tolerance value and does not contribute to the IB or OB of for perfect form at MMC is removed and the form tolerance the position or orientation tolerance.
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