Otherwise I don't bother, because our outside clients don't seem to care. ![]() I know it's going on when it happens in our shop, but in an outisde client's shop I won't find out until after the build is complete. A shim here or an up-sized sheet thickness there can throw all rivet length calcs out of whack. Secondly, I tend to know a lot more about what materials are available in our own shop, so the chain-reaction of various material substitutions is less of a mystery. I know the guy doing the work (sometimes it's me) and I know this step will save him 32 seconds of checking, and he's the kind of person that likes that stuff. On a drawing, I only call out the length of the rivet if OUR shop will be making the parts. RE: Rivet length call-out on drawings YoungTurk (Mechanical) 19 Jul 12 17:19 We believe to be true what we prefer to be true.įor those who believe, no proof is required for those who cannot believe, no proof is possible. However, when calling out specialized rivets such as non-standard alloys, or precision spec parts, or special oversize ODs, or blinds,, then length C/O is a detail not to be blown-off as trivial. When calling-out common soid rivets MS20470, MS20426, NAS1097 then extreme detail, such as length, is unecessary: shop should draw from common bin-stocks. allowing designers to avoid excessive detail for trivial elements such as solid rivet grip lengths.ĬATIA and other extreme 3D Cad packages mandate exact fastener definition. Hand drawings and 2D-Cad drawings allow the use of drafting short-hand.
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