Don’t Let a General Profile Tolerance Control Your Datum Features (#167)
(In accordance with Y14.5M-1994 standard)
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Often, when a general tolerance of profile of a surface is used on a drawing, people forget to apply geometric controls to the datum features. On this drawing, for example, if geometric controls were not specified on the datum features, there would be confusion over the amount of tolerance to be applied to these features since they establish the …
