When feature and patterns of features have the same datum reference, they are considered to be a pattern. This rule is not well understood, but it is a rule.
Don’t Forget Simultaneous Requirements (#215)
(In accordance with Y14.5M-1994 standard)
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The drawing on the left has three datum features which is pretty common. A lot of folks think this is necessary to completely control a part. Below the drawing is a possible gage that …
