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rizzari1-Visitor
1-Visitor
May 6, 2010
Question

denote a critical dimension

  • May 6, 2010
  • 3 replies
  • 11917 views

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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3 replies

B
brianlynn1-Visitor
1-Visitor
May 6, 2010
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
P
ptc-8104501-Visitor
1-Visitor
May 7, 2010
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



D
dgallup1-Visitor
1-Visitor
May 10, 2010
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.
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