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DRAWING NOTES 6

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dallas2000

Mechanical
Apr 23, 2012
7
"SOME COMPONENTS NOT SHOWN FOR CLARITY" placed as a drawing note sounds like you are showing components for some other reason besides clarity. Wouldn't it be more correct to say "SOME COMPONENTS NOT SHOWN" or to say which exact components are not shown? I have seen this note under a view where some components have been removed. Instead of being declarative, we are giving unnecessary reasons for why we created a view missing some components.
 
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Or,
"The parts you do not see were not drawn"

Sometimes its possible to do all the right things and still get bad results
 
I typically specify WHICH parts are not shown. I prefer specificity. Not specifying which components are hidden leaves the viewer/reader to assume that the part they can't find is not shown, rather than it possibly being overlooked, but present. It can also mean you avoid the incorrect assumption that "this part is P/N 004" when you have a note saying "Part 004 not shown" then they know it's something else.

I keep the "for clarity" phrase out of habit but I suppose it is a useless.
 
"SOME COMPONENTS NOT SHOWN FOR CLARITY" means that inclusion of those components on the drawing would make it difficult for the viewer to see certain things that are required to be seen in that drawing. For example, removing the hood from a car drawing would add clarity to the engine compartment view, so "Hood not shown for clarity" makes perfect sense.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
 
"Item X not shown for simplicity" or "Item X not shown for ease of drawing" or whatever applies. Don't say "for clarity" if it's because you just didn't want to draw it.
 
Hi Dallas2000,

Got an example (for clarity [bigsmile] ?

regards,

Dan T
 
"SOME COMPONENTS NOT SHOWN FOR CLARITY" means "SOME COMPONENTS ARE NOT SHOWN SO THAT YOU WILL MORE CLEARLY UNDERSTAND THE ONES THAT ARE SHOWN" but that is so much longer. :)
 
I understand what the note means. I just don't think it's necessary to say "...FOR CLARITY". The whole drawing is "FOR CLARITY". Also, it's like saying "ITEM 4 ADDED TO HOLD COVER IN PLACE" I don't need to say why I did something on the drawing. I just need to inform the reader that this is what was done regardless of my reason.
 
If you don't think it's necessary - don't write it.
 
I agree that the "components" should be specified. As in "HANDRAILS NOT SHOWN FOR CLARITY" OR "HANDRAILS NOT SHOWN". Just stating "SOME COMPONENTS" is a poor practice to me as there are numerous things that could not be shown and it is up to the reader (novice or senior) to interpret everything on the drawing that may not be shown. Stating what is not shown solves that issue and allows the reader to continue with their work rather than having to analyze everything to find out what all is not shown. As far as the "FOR CLARITY" comment, it doesn't matter to me. Put what you want. An argument over whether or not to put 2 extra words is not worth it to me.
 
I only use this form of note on assembly drawings, usually exploded views. I call out "ITEMS 3, 5, 8 NOT SHOWN" as needed.

"Art without engineering is dreaming; Engineering without art is calculating."

Have you read faq731-376 to make the best use of these Forums?
 
I also believe specifying exactly which items are not shown in a view is the best practice. I am trying to convince my manager that is the best way to go.
 
dallas2000 said:
I also believe specifying exactly which items are not shown in a view is the best practice. I am trying to convince my manager that is the best way to go.

Bear in mind that this will create an easily overlooked list of items that will need to be maintained throughout the drawing revision process. When part "456XYZ" replaces "123ABC" are you going to remember to update the assembly where it isn't shown (and the CAD file may not even reference it)?
 
Assuming there is a BOM on the drawing perhaps use the statement as a flag note and indicate each part by placing it next to the corresponding entry in the BOM. That way you can keep the note succinct but still indicate which parts are not shown.
 
BiPolarMoment said:
Assuming there is a BOM on the drawing perhaps use the statement as a flag note and indicate each part by placing it next to the corresponding entry in the BOM. That way you can keep the note succinct but still indicate which parts are not shown.

I like this idea.
 
So I normally say 'ITEMS X, Y AND Z NOT SHOWN FOR CLARITY' - not sure I can explicitly justify the use of 'FOR CLARITY' and generally I'm all for 'less is more' on drawing annotation but not sure this hits my threshold.

Can't imagine ever having a day at work where this was a worthy topic of conversation with my manager though - you hiring Dallas.:)

Posting guidelines faq731-376 (probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484
 
Dave, is that for clarity?

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