Hi Scott!

If the hole is off only 2-mils, I would say that is fine...how much is
more? I don't know
that IPC has something that defines drill accuracy. That should be called
out on the fab
drawing.

Most fab drawings that I've seen call out +/- 4-mils for drilled holes..I
could be wrong.

If you don't mind, who makes the press-fit connector that is saying if a
hole is off 2-mils
will give you problems? There must be something else going on....

Kind regards,

-Steve Gregory-
Senior Process Engineer
LaBarge Incorporated
Tulsa, Oklahoma
(918) 459-2285
(918) 459-2350 FAX




                      Scott Lefebvre
                      <ScottLefebvre@NV        To:       [log in to unmask]
                      ISION.TV>                cc:
                      Sent by: TechNet         Subject:  [TN] Through hole drill accuracy
                      <[log in to unmask]>


                      05/04/2005 05:10
                      PM
                      Please respond to
                      TechNet E-Mail
                      Forum; Please
                      respond to Scott
                      Lefebvre






I have looked profusely at IPC-6012 for a specification I could not find.
I need to know if there is a specification for PTH drill accuracy and
repeatability.  We have a press-fit connector we are having problems with.
The component manufacturer tested one of our boards and said the alignment
is off 2 mils or more in some locations.  I could not find what is the spec
in IPC to reference to, could someone please point me to the correct
document I should look at.

Sincerely,

SCOTT L



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