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【转帖】undimensioned tolerance
undimensioned tolerance
i have a drawing that states the following : interpret drawing per asmy14.100-200, dimensions and tolerances per asme y14.5m. in the drawing all the dimensions in the drawing are untoleranced. do i interpret these as basic dimensions? find a job or post a job opening there should be a tolerance block somewhere on the drawing format. that, or a note stating that untoleranced dimensions are basic. it's not uncommon to place that in a note "all untoleranced dimensions are basic" but you must also account for all permissible geometric variations. this can be done by having a global note stating a general surface profile. i've seen this on complex castings. best regards, heckler sr. mechanical engineer sw2005 sp 5.0 & pro/e 2001 dell precision 370 p4 3.6 ghz, 1gb ram xp pro sp2.0 nivida quadro fx 1400 o _`\(,_ (_)/ (_) "coming together is a beginning, staying together is progress, and working together is success." - henry ford we also use "all dimensions are reference" we do this if we buy a part as is and just want some dimensions for information purposes. it allows a receiving inspector to verify that we have a 1/4-20 x 1 inch long bolt, but he doesn't have to do a layout on the part. thanks to all that replied. it turns out i was not given all the information. i only recieved the drawing not the specification sheet with the tolerance block. seems a little queer that someone would put a tolerance block on a separate specification sheet, instead of on the drawing (where it would actually be useful). sunthorn- maybe this is pulling hairs, but the drawing should simply say "interpret drawing per asme y14.100m." since y14.100m invokes y14.5m, then it's redundant to invoke them both. also i believe that y14.100m says that the year of the standard should be left out of the callout (you might want to confirm this!). tunalover |
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