Steve:
        Based on some of the threads studies reported on this forum 14 mills
is the peak strength for a solder joint between a surface lead and the pad
under it. In my thinking, if your are going to pull a lead out of a barrel,
the barrel and lead would come out  first than the lead shear off the solder
joint. Not only there is a lot of surface contact between the lead and the
barrel but there are also the two pad fillets on either side of the board.
The  fillet on the side of the pull will do very little but the opposite one
will not go through unless the board material is severely damaged.
        Regards,
        Ramon


> -----Original Message-----
> From: Steve Kelly [SMTP:[log in to unmask]]
> Sent: Thursday, October 23, 2003 5:57 PM
> To:   [log in to unmask]
> Subject:      [TN] Solder Joint Strength
>
> I had a question from a customer today which I could not answer. Question
> was " if a pin is soldered in a through hole with an annular ring of .010
> is this a stronger joint than if the annular ring was .005" . Doesn't this
> depend more on the soldering technique that the size of the ring? Thanks.
> Steve Kelly
>
>
>
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