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Understanding MMC and LMC in ASME Y14.5: A Detailed Guide

Aygün Karaköse
in Theory
3 0 Expert
In geometric dimensioning and tolerancing (GD&T), MMC (Maximum Material Condition) and LMC (Least Material Condition) are fundamental concepts that help ensure proper part fit and function during manufacturing and assembly. These concepts link the physical size of a feature with its allowable geometric tolerance, enabling more flexible yet controlled manufacturing.
geometric dimensioning and tolerancing technical drawing standards engineering design gdt asme y145
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