Diameter symbol proper with OD/ID?
Diameter symbol proper with OD/ID?
(OP)
I was asked to settle an argument that stumped me. It's not GD&T but general dimension application.
Our products contain certain odd-sized custom fabricated tube components, and on drawings we often specify "OD" or "ID" after a diameter dimension. The question is whether it's proper to include the diameter symbol before the dimension when you do this. For example, is it either "Ø4.00" or "4.00 OD" but not "Ø4.00 OD"? Is the use of OD/ID after the dimension legal?
I did a quick look through Y14.5, DRM and the Genium book and didn't find anything that seemed to address this directly. Does anyone know of a standard or best practice, or have an opinion?
Our products contain certain odd-sized custom fabricated tube components, and on drawings we often specify "OD" or "ID" after a diameter dimension. The question is whether it's proper to include the diameter symbol before the dimension when you do this. For example, is it either "Ø4.00" or "4.00 OD" but not "Ø4.00 OD"? Is the use of OD/ID after the dimension legal?
I did a quick look through Y14.5, DRM and the Genium book and didn't find anything that seemed to address this directly. Does anyone know of a standard or best practice, or have an opinion?





RE: Diameter symbol proper with OD/ID?
Ø4.00" OD
"diameter of four point zero zero inches outside diameter"
Redundancy is bad.
4.00" OD
"Four point zero zero inches outside diameter"
No redundancy.
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NX8.0, Solidworks 2014, AutoCAD, Enovia V5
RE: Diameter symbol proper with OD/ID?
2. I've seen OD/ID used on rectangular tubes, so don't worry and use diameter symbol.
RE: Diameter symbol proper with OD/ID?
For experienced drawing readers, the Ø sends an instant message that the dimension is a diameter, and can help the reader sort the information presented.
RE: Diameter symbol proper with OD/ID?
RE: Diameter symbol proper with OD/ID?
Tunalover
RE: Diameter symbol proper with OD/ID?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Diameter symbol proper with OD/ID?
RE: Diameter symbol proper with OD/ID?
Even though OTD appears in ASME Y14.38, I'm pretty sure I know what my supplier's reaction would be...
RE: Diameter symbol proper with OD/ID?
If it needs to be there, I prefer KENAT's suggestion "Ø4.00 (OD)".
Chris, CSWA
SolidWorks 14
ctopher's home
SolidWorks Legion
RE: Diameter symbol proper with OD/ID?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Diameter symbol proper with OD/ID?
How about Ø4.00" OUTSIDE?
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JHG