Jon,
        IPC likes the hole not too large to assure good fill and mechanical
integrity. Panasonic likes the hole big enough to drive a truck through to
assure they can insert the part into the hole within the resolution and
repeatability of their insertion system....

Mike McMonagle
Quality Manager
OYO Geospace
7007 Pinemont Drive
Houston, TX 77040
Ph 713-986-8650
Fx 713-986-8725


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jon McDowell
Sent: Monday, February 13, 2006 4:58 PM
To: [log in to unmask]
Subject: [TN] Hole size specs

Technetters

I have a question for you

We are loading a component with a lead diameter of .032 +/-0.002 into a
hole that is .042 +/- 0.003.

On page 20 of IPC-2222 it states in tables 9-4 and 9-5 that with a
tolerance of +/-0.004 the max over sizing in respect to the lead
diameter (on the min side of tolerance) is +/-.023.  Can anyone explain
the reason behind these numbers.

We are using an Panasonic AVKII which call for the hole to be oversized
0.019 from the maximum lead tolerance.

Why would IPC and Panasonic specs not match, this puts us in a difficult
position.


Any help would be appreciated.

Thank You
Jon McDowell
Electronic Controls Co (ECCO)
833 W Diamond St
Boise Id 83705
P 208 395-8025




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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
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