Overview of Geometric Tolerances

Add Geometric Tolerances

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Material Conditions

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Concept

Quick Reference

Material conditions apply to features that can vary in size.

The second compartment contains the tolerance value. Depending on the control type, the tolerance value is preceded by a diameter symbol and followed by a material condition symbol.

Material conditions apply to features that can vary in size:

• At maximum material condition (symbol M, also known as MMC), a feature contains the maximum amount of material stated in the limits.
• At MMC, a hole has minimum diameter, whereas a shaft has maximum diameter.
• At least material condition (symbol L, also known as LMC), a feature contains the minimum amount of material stated in the limits.
• At LMC, a hole has maximum diameter, whereas a shaft has minimum diameter.
• Regardless of feature size (symbol S, also known as RFS) means a feature can be any size within the stated limits.