Hi Gil,
If you have HASL finish, the final hole size does not reflect the required
press fit hole size.
I you have OSP for example, the final holes size of PCB is the same as the
press fit requirements.


On Mon, Dec 2, 2013 at 1:01 PM, Zilber Gil <[log in to unmask]> wrote:

> Hi all,
>
> Press-fit manufacturer / spec /mil (i.e. mil-c-28859B) define the
> requested drill diameter and final diameter (and minimum copper and plating
> thickness). In may cases the PCBs manufacturer asked us to drill bigger
> diameter holes in order to get the requested final finish hole
> (manufacturer process standard). My question is why press-fit
> manufacturer/std define drill hole diameter and not finish hole diameter
> and minimum copper thickness? What could be wrong if approving manufacturer
> request (bigger drill diameter, control final finish)?
>
> Thanks
>
> Gil Zilber
> Elta system Ltd.
>
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