Hi Ioan-

Should be fine unless your insertion equipment requires more slop for
placement. If hand insert, it's fine as is. For older insertion equipment,
we used 1MM holes to comply with machine tolerances.

BR,
-Chris




                       "Tempea, Ioan"
                       <[log in to unmask]>          To:   [log in to unmask]
                       Sent by: DesignerCouncil          cc:
                       <[log in to unmask]>         Subject:    [DC] Hole diameter specification

                       08/28/2006 09:19 AM
                       Please respond to
                       "(Designers Council
                       Forum)"; Please respond to
                       "Tempea, Ioan"







Hi,

I have a TH cap that has 0.064" diameter pins and 0.089" diameter holes.
Are the holes properly designed?

I have skimmed IPC-2221 and IPC-D-279, but cannot find any formula for
calculating the diameter of the hole from the pin diameter. Where can I
find such formula?

Thanks,

Ioan

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