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Worst case tolerance for diameter

Worst case tolerance for diameter

Worst case tolerance for diameter

(OP)
Can anyone tell me how to calculate the maximum/minimum size of an inside diameter using circularity and runout?
ID size is .372 - .3735 circularity .00005 runout .0025

RE: Worst case tolerance for diameter

Benny1976,

Are you studying GD&T?

As per Rule #1, the maximum allowable diameter is .3735".

The minimum acceptable measurement across your diameter is .372". Circularity and runout refine your diameter tolerance. If you can measure .372" at one position, and .3725" at some other position, your part is not round enough. Trying to convert GD&T back into ± tolerances is futile.

--
JHG

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