True Position with MMC / LMC Bonus.
Compute true position from X/Y deviations. Apply MMC or LMC modifiers to get bonus tolerance from feature size deviation. ASME Y14.5 compliant.
Feature type
Material condition modifier
Drawing call-out
Measured
Formulas
Actual position ⌀ = 2 × √(X² + Y²)
Bonus tol (MMC, hole) = Actual − Smallest hole
Bonus tol (MMC, pin) = Largest pin − Actual
Total allowed ⌀ = Stated tol + Bonus
Bonus tol (MMC, hole) = Actual − Smallest hole
Bonus tol (MMC, pin) = Largest pin − Actual
Total allowed ⌀ = Stated tol + Bonus
Verdict
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Enter values to see result
Actual Position ⌀
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From X/Y deviations
Bonus Tolerance ⌀
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Total Allowed Position ⌀
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Stated tol + bonus
Margin
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