Hi all pros... I have a hole A.xxx +/- .005". If I want to control the hole to be on minimum side (A.xxx-.005) if possible, can I modifier MMC ? Vice versa, maximum side, LMC?
thank you
The MMC & LMC modifier define a variable tolerance boundary based on the size of the as-manufactured FOS. These modifiers will will not control the effective as-manufactured size to the minimum size.
I would first be sure that this is an actual meaningful end item design requirement. By default, a mechanical tolerances of +/- .005 is a range that is assumed to be acceptable for function and fit.
If this is a absolute requirement one could tighten up the tolerance range where the nominal is the desired size or using +/- 3 sigma as the 6 sigma range define a -3 to 0 sigma as a desired range for the size specification.
I don't recommend this, BTW.
Posting Permissions
Reply With Quote