denote a critical dimension

[rizzari]

Hi Folks,

What do you do on a drawing to denote a critical dimension? If there is a symbol like a filled diamond for example that you want to use, other then using a drawing symbol is there an extended character set that would work or could you add to the text symbol library?

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[brianlynn]

We use the inspection dimension style to indicate critical dimensions.

Highlight the drawing dimension in question, right button menu >
properties and then in the Display portion, on the left, select inspection
from the radio button tool.

Brian S. Lynn
Technical Coordinator, Product Engineering

[ptc-810450]

We put an asterisk (*) after the dimension, typed into the dimension text.
If you are using basic dimensions then "@[&d@] *" makes it look good (keeps
the asterisk outside of the box).

--
Mark von Huben

Principal Mechanical Engineer
Cochlear Ltd
14 Mars Rd
Lane Cove West, NSW, 2066
Australia

p +61 2 9425 5210

[dgallup]

If you are in automotive, TS 16949 tells you to use your customers critical characteristic symbols. Ford, GM & Chrysler all have their own symbols. We supply OE to a couple of other customers and they have their own as well. For products that don't have an OE customer, we have our own symbols. We use 3, one for safety & regulatory characteristics, one for critical fit & function and a 3rd if SPC is required. In all cases, we have the symbol defined and I use an offset attachment so it stays with a dimension or GD&T. I redefined the surface finish symbol to include an optional safety symbol as we have a lot of sealing surfaces that could leak fuel.