Hope you are only concerned with double-sided boards here.
The lateral fracturing out along the glass fibers away from
NPTH PEM site can be surprisingly extensive.  For multilayer
boards; better product design has PEM located in associated
metal fastener, with only the screw going through PCB Fab
(minimize potential for lateral stress).

Is product Class 1, 2, or 3 ?

- Karl Sauter

> MIME-Version: 1.0
> Date: Wed, 14 Nov 2001 08:18:19 -0500
> From: "McMullen, Kerry" <[log in to unmask]>
> Subject: Re: [TN] Manual Press for PEM PCB fastener
> To: [log in to unmask]
>
> Hi Peter,
> Based on volume, a small bench mount pneumatic works fine.  Also, the
> assemblers prefer it over the arbor.
> Things to watch out for:
> 1.  Watch out for component clearance around the anvil and the pin setter.
> 2.  Insure the insert is far enough back from the edge of the PCB to avoid a
> stress concentration area.
> 3.  Spec the hole tolerance accurately per the PEM callout.
>
> Good Luck!
> Kerry
>
>
> -----Original Message-----
> From: Peter Lee [mailto:[log in to unmask]]
> Sent: Wednesday, November 14, 2001 2:46 AM
> To: [log in to unmask]
> Subject: [TN] Manual Press for PEM PCB fastener
>
>
> Thanks Earl for your extensive report on NPI which will keep me tied up
> for a while in reading through it. I appreciate you for sharing your
> experience and information in this forum.
>
> I have another question for the day: Does anyone know of a good and
> reliable machine for press-in PEM PCB fasteners?
>
> I am considering machines from PENN ENGINEERING and SCHMIDT but like to
> get more inputs on both the press machine and the process. Would a
> manual press be able to put out ~2200 lbs at the fastener in practice?
> What are some common application problems that one should look out for?
>
>
> Rgds,
> Peter
>
>
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