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Y14.5-2009 said:1.3.2 Boundary, Inner
boundary, inner: a worst-case boundary generated by the smallest feature (MMC for an internal feature and LMC for an external feature) minus the stated geometric tolerance and any additional geometric tolerance (if applicable) resulting from the feature’s departure from its specified material condition. See Figs. 2-12 through 2-17.
Y14.5-2018 said:3.2 BOUNDARY, INNER (IB)
boundary, inner: a worst-case boundary generated by the collective effects of the smallest feature of size (MMC for an internal feature of size, LMC for an external feature of size) and the applicable geometric tolerance. See Figures 5-14 through 5-19.
An envelope of 8mm can only be kept unviolated if perfect form is required at LMC. Nothing in the example specifies that.
CH said:Burunduk,
Perfect form being not required at LMC doesn't mean local measurement can be less than 8 at any cross-section.
CH said:Still far away from 4. Suggestions?
I think that if there's an 8mm diameter sphere produced, with a 4mm deep dent opposing a 4mm high bump, that would conform both to the swept spheres definition and to the ALS application of size limits.
Exactly my point, I don't see additional tolerances applicable to a feature which only has a size tolerance applied.