Hello Ben,

Here is a helpful suggestion: Contact the chairman of the 620.


Op wo 5 mei 2021 om 16:31 schreef [log in to unmask] <
[log in to unmask]>:

> It came from the common crimp contact data sheets, which is what were used
> to provide most of the pull test data for WHMA/IPC-A-620. I tried to
> consolidate those by crimp style and common PNs at the time (years ago),
> but because these are constantly changing, it was impossible. So the
> terminology was added (at that time) to refer to the contact vendor's data
> sheets.
> There is no way any specification can cover every type and vendor
> variation of the millions of crimp sockets and contacts used in the
> industry. The vendor's Technical Data Sheets are typically used for each
> "family" of crimp specifications and contact specifications. These have a
> table showing wire gauge range, current carrying capacity, etc., and for
> each one there is always a listing of the crimp-test pull strength and rate
> of pull per minute. Some go down into the ROP/second, such as for cell
> phone connections, etc. The TDS takes precedence over the 620
> specification, or at least it should.
> Dean
>
> -----Original Message-----
> From: TechNet <[log in to unmask]> On Behalf Of Gumpert, Ben
> Sent: Wednesday, May 5, 2021 8:56 AM
> To: [log in to unmask]
> Subject: [TN] IPC/WHMA-A-620 - crimp pull force pull-rate
>
> ----
> External E-mail --- CAUTION: This email originated from outside GDMS. Do
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> Technetters,
>
> Does anyone know where the Class 3 pull-rate for crimp pull force testing
> came from?
> It's listed as "?1 inch/minute" but other documents I've looked at have 1
> ± 0.25 in/minute. (e.g., AS22520)
>
> Looks like this section was introduced with the 2006 rev A document.
>
>
> Ben Gumpert
>


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