need help to establish tolerance
 

need help to establish tolerance
to assemble a couple of pins at diameter 5.1 from detail l with a press, the part (material aluminuim) is fixed using the two diameters of 40.035 (section a-a). basically two cylinders get inside those two "pockets" (diameters of 40.035).
i will really appreciate your help to establish the correct tolerance for the couple of cylinders that help fix the part. is it better to keep one rigid and the other one flexible? is it enough with just a tight tolerance? what will be the correct tolerance?
i really appreciate your help, thanks.

this might get more responses in the mechanical engineering other topics topic.
matt lorono
cad engineer/ecn analyst
silicon valley, ca
you are asking very specific questions regarding one part. the fit of the mating parts on this housing will determine the tolerances you need. look at the whole assembly design and you will most likely answer your own question.
thanks fcsuper i will try it, though, checkerron suggestion is a good idea. it will be a little bit hard because the mating part has a very very tight tolerance (since it slides up and down on those pockets) but it is a smart reference to take in account. thanks both of you for your responses.

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