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February 1999

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Subject:
From:
Jerry Cupples <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 10 Feb 1999 10:29:41 -0600
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Andrew Sherry asked:

>Can anyone tell me the pull-test requirement for solderless wirewrap, i.e.
>frequency, tools required, procedure etc..

Use a manual pull force gage like the Wagner FDL, and a home-made metal
"fork" to slip under the first wrap.

Based an old copy of Bell System Practics section 800-612-154 paragraph
3.29, minimum inspection force without visible displacement is:

24 AWG  2,500 g
26 AWG  2,220 g
28 AWG  1,750 g
30 AWG  1,200 g

See also Bell Communications Research publication 48010 if this is still
published. I would suggest sample wraps be tested weekly for each
bit/sleeve used, but this is also a function of the corner radius of the
wrapped post, so you need a provision for testing normal product, or at
least samples thereof.

Cooper Tools of Cheraw, SC was the successor to Gardner Denver, who claims
to be the inventor of this technology.

Contact me for more details, I wrote a comprehensive tome on the subject of
solderless wrapped connections, tooling, and maintenance for a former
employer in 1991, and kept it for some bizarre reason.


regards,







Jerry Cupples
Interphase Corporation
Dallas, TX USA
http://www.iphase.com

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