MMC bonus

I am dimensioning true position of a few holes, the diameters are out of tolerance (to big) so should they still benefit from the MMC and gain that Bonus tolerance?

or do they not receive bonus since the diameter is out of tolerance?

I've seen a few situations where the diameters are to big but still receive the full bonus, and situation where the diameter is to big and not receive any bonus.

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RandomJerk over 7 years ago

I'd say it depends on your customer. If the hole is oversized, and the true position is only because of the 0.2 bonus for the oversized hole, I'd make both perfectly clear when asking for relief from tolerance..

If you're asking for internal process control reasons, IMHO I wouldn't use bonus tolerance at all. For process control I'd use RFS, the process need be dialed in in case the hole size changes. The part may be acceptable, but I would do that determination separately.
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RandomJerk over 7 years ago

I'd say it depends on your customer. If the hole is oversized, and the true position is only because of the 0.2 bonus for the oversized hole, I'd make both perfectly clear when asking for relief from tolerance..

If you're asking for internal process control reasons, IMHO I wouldn't use bonus tolerance at all. For process control I'd use RFS, the process need be dialed in in case the hole size changes. The part may be acceptable, but I would do that determination separately.
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