Feature-of-size screen
MMC bonus & virtual condition
Inputs
Select internal hole or external pin for the displayed one-feature model.
Smallest permitted hole or largest permitted pin size.
Measured size of the same feature in the stated condition.
Stated diametrical positional tolerance at MMC.
Results
Available bonus tolerance
0.15
Total position tolerance
0.35
Simplified virtual condition
9.8
Bonus = actual hole − MMC hole; VC = MMC hole − ⌀T
A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.
Nearby: ISO 286 fits · Tolerance stack · Position deviation · Process capability Cp/Cpk
Method
Formula, when it applies, and when it does not
Inspect bonus tolerance and a simplified virtual condition for one internal or external feature of size under a MMC position callout.
Bonus = actual hole − MMC hole; VC = MMC hole − ⌀T
When
- Single cylindrical feature of size
- One MMC position control
- No datum shift or composite callout
Don’t
- This single-feature screen assumes one cylindrical feature, one MMC position control, and no datum shift, composite frame, projected zone, or functional-gage interpretation beyond the displayed formula.
ISO 2692 — maximum material requirement