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March 2004

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Subject:
Re: Finished Hole Size vs Lead diameter
From:
Brian Ellis <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 29 Mar 2004 18:34:39 +0300
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text/plain
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text/plain (44 lines) 
I don't know about a document, but I always used a rule of thumb, of 0.2
to 0.3 mm ID, after plating, greater than the diagonal or diameter of
the lead. FWIW.

Brian

Victor G. Hernandez wrote:

> Fellow TechNetters,
>
>     Can someone guide me to an IPC document that make reference to
> Finish Hole Size
> versus lead acceptable lead diameter with respect to ROUND, RECTANGULAR
> and SQUARE
> Leads.   I have a case in which the square lead deformed the PTH and
> minimal solder
> fillet is exhibited inside the barrel.   At least in my opinion.
>
> In advance I thank you for your timely response in this matter.
>
> Victor,
>
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