![]() ![]() ![]() The orientation and position of the boundary axis within this plane is unconstrained. For holes at MMC or RFS and shafts at LMC, each tolerance boundary is a cylinder of diameter equal to the collective effects of the limits ofsize, material condition basis, and applicable thebasicdimensionsofthepatternrelativetothespeci- fieddatumreferenceframeandbytheapplicabledirection of tolerance control, such that the axis of each boundary lies in the plane containing the true position axis of the corresponding feature and normal to the direction in which the tolerance applies. Forapatternofcylindrical features, each bidirectionalpositiontolerancespecifiesthateachsurface must not violate a tolerance boundary. This paragraphestablishes thesurfaceinterpretationof bidirectional position tolerancing when applied in a rectangular coordinate system. ASME Y14.5.1-2019 pdf download.Mathematical Definition of Dimensioning and Tolerancing Principles. ![]()
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