"G" symbol on older print?
"G" symbol on older print?
(OP)
We have a drawing here from the mid 80's that doesn't reference any standards. On the drawing is a symbol I haven't seen before. The symbol is the letter G inside a triangle and it is applied to a couple of dimensions. The best guess I have is that they mean that the feature the dimension applies to must be ground, but you'd think (or at least I would think) that the G would be applied to the feature, not the dimension. Also the part is made from 416 SS, Rc 26-32 so it wouldn't really need grinding and there's no surface finish requirements defined. There are no similar callouts on the drawing. I've attached a portion of the drawing for reference.
Any ideas on what this callout really is?
Any ideas on what this callout really is?





RE: "G" symbol on older print?
RE: "G" symbol on older print?
RE: "G" symbol on older print?
RE: "G" symbol on older print?
Thanks again!
RE: "G" symbol on older print?
Also, it may have just been an oversight, perhaps it should have been removed at rev H but got missed while all the other deltas were caught.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: "G" symbol on older print?
RE: "G" symbol on older print?
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: "G" symbol on older print?
Mike Halloran
Pembroke Pines, FL, USA
RE: "G" symbol on older print?
I don't recommend triangles, since triangles make good flag note symbols (allowed). Squares are OK flag note symbols, but are too similar to datum symbols for my tastes.
My personal preference is to use triangles for flag nots and hexagons for revision symbols. Hexagons are good candidates for revision symbols if you want to avoid them looking like something else.
Matt Lorono, CSWP
Product Definition Specialist, DS SolidWorks Corp
Personal sites:
Lorono's SolidWorks Resources & SolidWorks Legion
RE: "G" symbol on older print?
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