In this Question Line video, Jason answers the following question about rounding basic dimensions:
I took a GD&T class last year and the instructor said there is no rounding for GD&T features. I have a coworker who insists that rounding is allowed. Can you please clarify the rules of rounding as it pertains to GD&T measurements?
In this video, Jason assumes the question of “GD&T measurements” is referring to basic dimensions. He reviews a drawing of a clevis bracket where a basic dimension is used to define the ideal location (true position) of the holes in the tabs, while Position tolerance sets the allowable deviation. Jason walks through an example to show how rounding basic dimensions impacts the placement of the tolerance zone and could cause functional parts to be rejected.
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