MMC / LMC Bonus Tolerance Calculator

Inputs

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Which material limit the MMC or LMC modifier references, for a hole (internal) or pin (external) feature.
Smallest hole / largest pin for MMC; largest hole / smallest pin for LMC.
mm
The feature’s actual measured size.
mm
The geometric tolerance stated in the feature control frame, before any bonus.
mm

Results

Default result
Edit inputs
Bonus tolerance
0.3mm
Pass

Earned from the feature’s departure from MMC.

The feature’s departure from its material limit, clamped to ≥ 0.

Also computed

Total allowable tolerance0.5mm

Geometric tolerance + bonus.

Departure from limit0.3mm

Before clamping to ≥ 0.

Method notes 2 notes
  • Bonus tolerance = the feature’s departure from its MMC limit, added to the geometric tolerance.
  • A feature at exactly the material limit earns no bonus; departure (and bonus) grow as it moves toward the opposite limit.

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