Simple cylindrical MMC example only
For an applicable simple cylindrical size feature under MMC control, the external boundary can be expressed as MMC size + geometric tolerance; the internal boundary as MMC size − geometric tolerance. These are limited teaching relations, not a universal formula for every modifier or feature.
What the shortcut leaves out
Do not extend the relation to LMC, composite controls, different boundary conventions or datum effects without checking the governing rules. The mating part, datum relationships and other requirements remain relevant.
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Sources and review scope
Reviewed 23 October 2026. Arithmetic examples are labelled separately from source-table facts and standard scope.
KEYENCE — Maximum material condition
Manufacturer explanation: departures from MMC do not remove the need to meet size limits.
Open the original source ↗KEYENCE — Modifier locations
Distinguishes modifiers following the tolerance value from those following a datum reference.
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