Hi Tracy,
Try IPC-2221, 9.2.5 or IPC-2615

Steven D. Roy,CID
PCB Designer
Audio Authority Corp.
2048 Mercer Road
Lexington, KY  40511-1071
(859) 233-4599 X-159
[log in to unmask] 

-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Tracy
Norton
Sent: Wednesday, September 30, 2009 12:36 PM
To: [log in to unmask]
Subject: drill tolerance

I just got caught in an embarrassing situation. A client pointed out 
that I don't have drill tolerance specified on my fab notes, and wants 
it added AND referred to the specific IPC standard
I looked back at all my work as far back as to '98...and there's no 
drill dia tolerance callout!
All I need is pointed to specific standard so I can research it and add 
to notes
Thanks!
Tracy Norton

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