Means This

n i M TT IIIIIUMHI IXLUlJUm ^_____MTUTJUUi

TTTffmnnmiMiiiiiiiimm uüüiiiüii iiluj [romiáüi

TTTffmnnmiMiiiiiiiimm uüüiiiüii iiluj [romiáüi

00.15 at MMC, four coaxial tolerance zones within which the axes of the holes must lie relative to each other

L 00.25 at MMC. four coaxial tolerance zones located at true position relative to the specified datums within which the axes of the holes, as a group, must lie

FIG. 5-52 POSITIONAL TOLERANCING FOR COAXIAL HOLES OF SAME SIZE, PARTIAL {PARALLELISM) REFINEMENT OF FEATURE-RELATING AXIS

See Fig. 5-58. Where the items depicted in Figs. 5-56 and 5-57 are checked for a concentricity relationship, only the part depicted in Fig. 5-57 would be acceptable, since the midpoints of some of the diametrically opposed elements in Fig. 5-56 would exceed the boundary of the 0.4 diameter concentricity tolerance cylinder.

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