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Hi all
I have a doubt regarding the allocation of the positional tolerance using "Fixed Fastener Formula" mentioned in the ASME Y14.5.
The formula says that the allowable tolerance i.e. difference between the MMC of the fastener and the MMC of the hole is being equally divided and allocated to the clearabce part and the threaded part.
But I have seen some example in which the division of the tolerance is not equal i.e. not 50:50 but the division may be 60:40 or 70:30 i.e 60% of the total allowable tolerance is given to the threaded part and 40% is given to the clearence part.
Is there any guidelines that can be used for such unequal division of the tolerance or it comes from the experience only?
I have a doubt regarding the allocation of the positional tolerance using "Fixed Fastener Formula" mentioned in the ASME Y14.5.
The formula says that the allowable tolerance i.e. difference between the MMC of the fastener and the MMC of the hole is being equally divided and allocated to the clearabce part and the threaded part.
But I have seen some example in which the division of the tolerance is not equal i.e. not 50:50 but the division may be 60:40 or 70:30 i.e 60% of the total allowable tolerance is given to the threaded part and 40% is given to the clearence part.
Is there any guidelines that can be used for such unequal division of the tolerance or it comes from the experience only?
