The formula previously given for the floating fastener case also applies to mating parts having two coaxial features where one of these features is a datum for the other. See Fig. B-3. Where it is desired to divide the available tolerance unequally between the parts, the following formula is useful:
(This formula is valid only for simple two-feature parts as shown here. Consideration must be given for other geometric conditions that may be required for ftinction.)
EXAMPLE: Given the information shown in Fig. B-3. solve for 7\ and T2:
= (20 + 10) - (19.95 + 9.95) = 0.1 total available tolcrancc
Was this article helpful?