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dav2008
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"Functional gages cannot be used to inspect features specified at LMC."
What does that statement mean?
I am going through "GD&T for Mechanical Design" by Cogorno (McGraw-Hill) and it makes that statement on page 24.
What does that statement mean?
I am going through "GD&T for Mechanical Design" by Cogorno (McGraw-Hill) and it makes that statement on page 24.
As the size of the feature departs from LMC toward MMC, a bonus tolerance
is gained in the exact amount of such departure. Bonus tolerance
is the difference between the actual feature size and the LMC of the feature.
The bonus tolerance is added to the geometric tolerance specified in
the feature control frame. LMC is used to maintain a minimum distance
between features. The LMC is seldom used. Functional gages cannot be
used to inspect features specified at LMC.