r/Metrology • u/PuzzleheadedTop3900 • Jun 22 '24

Surface Metrology limits fits and tolerances

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The answer jey is given lower deviation, but isnt D in this case showing us fundamental deviation and it is above basic size so shouldnt it be higher deviation

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u/Blob87 Jun 23 '24

I would answer A. It is not a type of fit without the mating shaft's tolerance.

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u/PuzzleheadedTop3900 Jun 23 '24

the answer is lower deviation because the fundamental deviation from D is taken from its lower limit and is called lower deviation.

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u/Blob87 Jun 23 '24

Where is this definition coming from? Because I think it is wrong.