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Standard Notes for Parts & Assemblies

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CKuba

CKuba

Aerospace
Mar 13, 2008
1
US
Reference: thread1103-193170

Hi all, I am starting to get that "standards" beast rolling here. To that end, I am looking to gather a few of your standard drawing notes for parts and assemblies from those who are willing to post.

I thank you in advance for your sharing...

Corey
 
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We're over due for an update (a couple may be slightly incorrect/misleading/out of date) but this is what's in our current format. We have at least 5 other semi standard notes but can't fit them all in easily so we're going to have to come up with a better method. Hope it helps.


NOTES: UNLESS OTHERWISE SPECIFIED

1. DIMENSIONS AND TOLERANCES ARE IN ACCORDANCE WITH ASME Y14.5M-1994.
2. INTERPRET DRAWING IN ACCORDANCE WITH ASME Y14.100.
3. SCREW THREADS TO BE IN ACCORDANCE WITH ASME B1.1.
4. DIMENSIONS ARE IN INCHES.
5. SYMBOL ¨ DENOTES CRITICAL DIMENSION / FEATURE IN ACCORDANCE WITH 1QA73002.
6. MATERIAL:
7. SURFACE ROUGHNESS TO BE ____ RMS PER ASME B46.1.
8. REMOVE ALL BURRS AND SHARP EDGES ____ MAX RADIUS OR CHAMFER.
9. ELECTROLESS NICKEL PLATE, .0003-.0005 THICK IN ACCORDANCE WITH SPEC MIL-C-26074 OR EQUIVALENT. DIMENSIONS APPLY AFTER PLATING.
10. ANODIZE PART PER MIL-A-8625 TYPE IA (CHROMIC ACID METHOD) CLASS 1, COLOR: GRAY
11. ANODIZE PART PER MIL-A 8625 TYPE II, (SULFURIC ACID METHOD) CLASS 2, COLOR: (SPECIFY COLOR).
12. ANODIZE PART PER MIL-A-8625 TYPE II, CLASS 2, COLOR: FLAT BLACK.
13. HARD ANODIZE PART PER MIL-A 8625 TYPE III, .0020 ± .0005 IN. COLOR: BLACK. DIMENSIONS APPLY AFTER ANODIZE
14. FINISH: CHROMATE CONVERSION COATING PER MIL-STD-5541 TYPE 1A (GOLD).
15. FINISH: CLEAN & PASSIVATE TO SAE AMS 2700.
16. INSTALL PRESS FIT STANDOFFS, STUDS, AND NUTS IN ACCORDANCE WITH THE MANUFACTURER’S SPECIFICATIONS.
17. INSTALL HELICAL COIL INSERTS IN ACCORDANCE WITH THE MANUFACTURER’S SPECIFICATIONS.
18. IDENTIFY PART WITH PART NUMBER, REV LETTER AND SERIAL NUMBER BY ELECTRO-CHEM ETCH, METAL STAMPING, ENGRAVING OR LASER ENGRAVING (CHOOSE METHOD) WITH _____ IN. HIGH CHARACTERS WHERE SHOWN.
19. IDENTIFY PART WITH PART NUMBER BY BAGGING AND TAGGING.
20. FINISHED ARTICLE TO BE FREE OF OILS, LUBRICANTS AND OTHER CONTAMINANTS PRIOR TO BEING PLACED IN SEALED BAG.
21. FINISHED ARTICLE TO MEET CLEANLINESS REQUIREMENTS OF IEST-STD-CC1246D LEVEL 100 (VERIFY CORRECT LEVEL). IF NOT TO BE USED IMMEDIATELY THEN TO BE ENCLOSED IN PACKAGING TO IEST-STD-CC1246D LEVEL 100 (VERIFY CORRECT LEVEL) LABELED: “CLEANED, DO NOT OPEN OUTSIDE OF CLEAN ROOM”. COMPLIANCE WITH THIS REQUIREMENT BASED ON USE OF A QUALIFIED MANUFACTURING PROCESS IS ACCEPTABLE.
22. ITEM SHALL BE ASSEMBLED IN A CLASS 6 (VERIFY CORRECT CLASS) CLEAN AREA MAINTAINED AS PER ISO 14644-1. (CLEAN AREA TO FED-STD-209, CLASS 1,000 (VERIFY CORRECT CLASS) IS ACCEPTABLE ALTERNATIVE.)


DRAFTING NOTE: Above notes are meant to be added to or deleted, as needed for the individual part or assembly drawing. Textual changes are not to be made, other than as noted in Notes 6, 7, 8, 11, 18, 21 and 22. Text colored red or sky blue to be replaced/deleted prior to release.

Note 12 is recommended for non-reflective, light sensitive areas in lieu of Note 13, (hard anodize).

If metric threads and/or dimensions are used:
Modify Note 3 to read: 3. METRIC SCREW THREADS TO BE IN ACCORDANCE WITH ASME B1.13M. METRIC THREAD CALLOUTS WITHOUT A PITCH SPECIFIED ARE COURSE PITCH.
Modify Note 4 to read: 4. DIMENSIONS ARE IN MILLIMETERS.

SPECIALIZED DRAWING NOTES

TO BE ADDED TO DRAWING NOTES AS NEEDED:



SOURCE CONTROL DRAWINGS, shall contain the following two notes:

23. ONLY THE ITEMS DESCRIBED ON THIS DRAWING ARE APPROVED FOR USE IN THE APPLICATIONS SPECIFIED HEREON. A SUBSTITUTE ITEM SHALL NOT BE USED WITHOUT PRIOR APPROVAL BY THE QUALIFYING ACTIVITY.
24. IDENTIFICATION OF THE APPROVED SOURCE(S) OF SUPPLY HEREON IS NOT TO BE CONSTRUED AS A GUARANTEE OF PRESENT OR CONTINUED AVAILABILITY AS A SOURCE OF SUPPLY FOR THE ITEM DESCRIBED ON THE DRAWING.


KENAT, probably the least qualified checker you'll ever meet...
 
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Just out of curiosity, if you are plating and anodizing, might the DIMENSIONS APPLY AFTER PLATING AND ANODIZING.
 
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We add the qualifier after the treatment spec (not sure why it's not on 10-12 except that they are very thin) does that answer your question?

KENAT, probably the least qualified checker you'll ever meet...
 
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"might the DIMENSIONS APPLY AFTER PLATING AND ANODIZING".
Not always. Depends on your design. Also, some companies have a part drawing and a separate plating drawing.

Chris
SolidWorks/PDMWorks 08 2.0
AutoCAD 06/08
ctopher's home (updated 10-07-07)
 
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Hm, we've had the discussion before, and I still say that note 1 implies notes 2 and 3. Kenat likes it spelled out so nobody can claim ignorance, his policy is probably a correcter one :), and keeps his vendors on the straight and narrow.

Kenat,

"COURSE" in note 3/metric threads, should be "COARSE". Please make the changes noted and resubmit. :p
 
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...and I should add a signature line for this forum, something like:

"less qualified to be a checker than KENAT".
 
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btrue, I'd actually say it's more correct to say 14.100 invokes 14.5 per para 1.1.3 of 14.5.

Looking at ASME Y14.5M-1994 section 1.2 References, 14.100 isnt' even mentioned, nor is B1.1 although it does give 14.6 which up to a point leads you back to B1.1 as I recall.

The standards (I think 14.6 but can't be bothered to look right now) actually say the thread standard should be specified on the drawing, I know most people don't bother though.

Course/Coarse - school boy error, not sure how that got in. I didn't write most of the notes our previous checker did but I should have spotted it by now. Right it out 100 times coarse coarse coarse...



KENAT, probably the least qualified checker you'll ever meet...
 
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Right - Write, no wonder I didn't spot coarse & course.

Does it make sense for someone with dyslexia to be a checker?

KENAT, probably the least qualified checker you'll ever meet...
 
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Don't quote me 'cause it was done just before I started here but I think our format was based very closely on Y14.1 which I don't think has the notes in the format.

But I agree notes 1 & 2 at least could be in the format if you so chose.

So, several of you have picked holes in my/our standard notes, how about someone else posting theirs to help out the OP?

KENAT, probably the least qualified checker you'll ever meet...
 
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ctopher, yes - at times that the pre plated and/or anodized dimensions may be desired.

Let me see if I can clarify my question.

In the event you have a part both plated and anodized - and you wish the dimensional limits to apply to the plated/anodized part, is there a difference by stating it separately vs. PLATE PER . . ., ANODIZE PER . . ., oh and by the way, DIMENSIONAL LIMITS APPLY AFTER PLATE, ANODIZE, HEAT TREAT, PAINT, etc.

Not trying to poke holes KENAT, usually do the same. Seeing one giant cafeteria-style list (does the whole list appear on all drawings?) spurred the question.
 
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Our formats (which are pure ISO, not ANSI) specify units, general tolerances (linear, angular, surface roughness, edge break & concentricity). Material, form, material spec, heat treatment & finish all have boxes. These are all filled in automatically by model parameters We also have a projection symbol, copyright note and a statement of our internal specification that stipulates exactly which standards we use for dimensioning, tolerancing, etc.

We do not have ANY default notes in the drawing format although we usually add some notes. We keep a library of the common ones.

On the subject of coatings, it is best to explicitly state that dimensions are either inclusive or exclusive of platings. If you don't specify, I think it is logical to assume the dimensions are inclusive but it certainly could lead to mistakes & debates. Much better to always be specific.
 
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Kenat,

As usual you are right about the order-of-precedence for the specs. And I can't think of any notes your standard list omits, that I use with any frequency, with the exception of those for castings which references the viewer of the drawing to the solid model file and gives generic tolerances for un-dimensioned features on the drawing.
 
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OOPs! Sorry Matt, you are correct. I was looking at too many sites at once. Thanks for the clarification.

weavedreamer,
You may call out both plating & anodize on one drawing, but you have to make sure it is clear what you want. The process and steps will be called out on a separate doc.
Some companies like them to be on separate dwgs because it is easier to send the plating dwg to the plater and the anodize dwg to the anodizer. Some machine shops will use their own.

Chris
SolidWorks/PDMWorks 08 2.0
AutoCAD 06/08
ctopher's home (updated 10-07-07)
 
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Weavedreamer, all the notes are in the drawing template and come up when you start a new drawing. The Engineer/Designer is meant to delete/edit them (it's clearer in the CAD because areas that need editing are highlighted in colour).

Gotta dash, my yearly review is in one minute.

KENAT, probably the least qualified checker you'll ever meet...
 
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