Please, no "square pegs in round hole" jokes!!

David A. Douthit
Manager
LoCan LLC

"Reid, Lorraine" wrote:

> Can anyone point me in the direction of any investigations into the
> potential for long term failures caused by inserting a thru-hole mounted
> connector into holes which are slightly too small to fit?
>
> We have a situation where a connector, with square pins, diagonal
> dimension 25 thou, is being inserted into plated holes, finished size 22
> thou.  The connector is then soldered.   The connector pins can be
> forced in, but I am concerned about the potential for damage that may
> not appear immediately obvious.  The board is 4 layer, so obviously
> there are connections from the holes to the inner layers.  The obvious
> solution is to enlarge the holes (not possible for this batch), but the
> designer is unwilling to make changes unless we can prove that there is
> a genuine risk of failure of the interconnects due to forcing the
> connector into the board.
>
> Thanks in advance
>
> Lorraine Reid
>
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