Proper Masking Notes
Proper Masking Notes
(OP)
Does anyone know the proper method for noting an area to be masked from a coating on an enginering drawing? I have a part that will be painted everywhere except for a bore and I cannot find how to note this in any of the ASME Y14 specs. I am looking for a graphical method and not so much a text note, if it exists. Thank you.





RE: Proper Masking Notes
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RE: Proper Masking Notes
I will say this much, you don't want to tell them what or how to mask. You want to tell them what surface is to be free of the finish/coating. It's a subtle difference much of the time but better complies with ASME Y14.5M-12994 1.4e. Also for some combinations of material/finish/process it can in fact be preferable to part machine the item, treat it & then finish machining the areas to be free of coating. Telling them what areas to mask theoretically precludes this.
In your case, I'd put a 'flag' next to the dimension for the bore to a note. In the note I'd say something like "SURFACE OF HOLE TO BE FREE OF COATING".
KENAT,
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RE: Proper Masking Notes
Chris
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