John,

Most shops can hold 5, some only 8, some only 10, shops that can hold 5 will
offer 8 or 10 to allow variance...

There is not industry standard as it is the unique project that dictates the
required tolerance. If your current sources cannot provide the level of
tolerance you need then search for other sources. Keep in mind as the
tolerance grows tighter, the price will usually go higher so ask before
dimensioning, do all those tolerances need to be that tight?

Franklin

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Babcock John
Sent: Thursday, December 01, 2005 5:15 PM
To: [log in to unmask]
Subject: [TN] Dimensioning Tolerances

Sorry for such a rudimentary question but is there an industry standard
these days on a overall board dimension...edge-edge?  I've talked to
some board houses they can hold +/- 0.005" with no problems and other
have problems holding +/- 0.008".

Does everyone use +/- 0.010 as a general guideline unless something more
critical calls out for a +/- 0.005?

I've been under the impression the past few years that typical houses
can do +/- 0.005 with no problems.

Thanks in advance!

John

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------