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glastar(at)gmx.net
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 Posted: Wed Dec 10, 2008 10:06 am Post subject: Crimping of machined D-sub pins with 4-Way Indent Pin Cr |
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That crimp seems to be to far to the end for me, mine are in the centre
of the rear cylindrical part, so I'm afraid it's not properly adjusted.
AWG 24 will be to small for this pins (however you might be able when
doubling the wires to get a good grip, just the number of strands are
marginal if no strain relief on a d-sub case housing is done)
br Werner
MauleDriver wrote:
| Quote: | I think I have several problems and oversights that need to be addressed.
I'm using a tool that looks like this:
http://aeroelectric.com/Pictures/Tools/Crimp_Tools/rct-3.jpg
As you said, it is setup for one size of wire and one type of
pin/socket. I've been using it on 20AWG and probably 22 AWG which
would immediately indicate some inconsistency. But in this case, I
was using it on 24AWG wires that was part of a pre-made harness pig tail.
In addition, I was trying to strip the wire just far enough to barely
clear or be flush with the pin. Given that this crimper seems to
crimp concentrically at the the very tip of the pin, allowing any of
the insulation into the pin could further compromise the crimp. (I'm
attaching 2 pics of the pin that failed).
I first need to determine what size wire the crimper is setup for and
limit its use to that wire. And re-confirm I'm using the right pins
(non-high density).
For this particular connection involving the 24AWG wires, I'm going to
follow your guidance on using a 9 pin D-sum with solder terminals
along with shrink tubing, clear adhesive and more shrink tubing. It's
a good solution for this particular connection.
I'll have to take a closer look at the adjustable Daniels crimper if I
want to get serious... but it may be too expensive to justify.
What do you think?
Robert L. Nuckolls, III wrote:
>
> <nuckolls.bob(at)aeroelectric.com>
>
> At 08:04 AM 12/10/2008, you wrote:
>>
>> <MauleDriver(at)nc.rr.com>
>>
>> I've become a bit concerned about the integrity of my crimped D-sub
>> pins and socket. I've been giving each connection a tug after
>> crimping and I just had one come off. Upon examination, I can't see
>> the difference between that connection and others I recently made.
>>
>> So the question is, what is the proper technique for crimping on
>> Machined D-sub pins with a 4-way indent pin crimper? I've searched
>> Bob's site and the Web in general and can't find any how-to
>> information. None came with the tool I obtained from Stein.
>>
>> In particular, how should the tool be adjusted? How far should the
>> wire be stripped (should the insulation be clear of the pin or
>> should it be in the pin)?
>
> Insulation can touch the pin but the wires need to be
> inserted a minimum depth as observed through the inspection
> hole. My installations have a pretty good gap between
> end of pin and insulation when the strands are fully
> inserted on the pin.
>
> http://www.aeroelectric.com/Pictures/Connectors/D-Subminature/D-Sub_4-quad-crimp.jpg
>
> If your tool looks like this:
>
> http://aeroelectric.com/Pictures/Tools/Crimp_Tools/rct-3.jpg
>
> There are no adjustments to be made. The tool is set up for
> D-sub, 20AWG pins like . . .
>
> http://www.aeroelectric.com/Pictures/Connectors/D-Subminature/D-Sub_20AWG_Pin.jpg
> http://www.aeroelectric.com/Pictures/Connectors/D-Subminature/D-Sub_20AWG_Socket.jpg
> and should produce a finished joint like the first
> picture above.
>
> If your tool looks like this:
>
> http://aeroelectric.com/Pictures/Tools/Crimp_Tools/4-Quad/Daniels_4-Quad_1.jpg
> then there are adjustments to be made in addition to selecting
> the right pin positioner. The tool should have come with instructions.
> http://aeroelectric.com/Pictures/Tools/Crimp_Tools/4-Quad/Daniels_4-Quad_2.JPG
> http://aeroelectric.com/Pictures/Tools/Crimp_Tools/4-Quad/Daniels_4-Quad_3.JPG
> http://aeroelectric.com/Pictures/Tools/Crimp_Tools/4-Quad/Tool-Locater_Cross_Reference.jpg
>
>
>> Should I solder?
>
> No . . .
>> Avoid the crimp pins altogether and use solder-on D-subs?
>
> Millions of these pins are installed every day world wide and
> deliver as advertised. You need to figure out what's going
> on with your materials, tools, techniques . . .
>
>> Use the 'regular' crimp on, stamped pins instead?
>
> No, these are more problematic for the neophyte builder than
> machined pins. I don't even keep them in the shop. We've
> been 100% machined pins for 20+ years.
>
>> Crimp and solder (the hole in the barrel of the pin suggests that
>> may be an option).
>
> No, that's an inspection hole. If the wires are sufficiently
> inserted you can see the strands through the hole.
>> Advice or links are welcome. Thanks
>
> What tool do you have? What pins are you trying to install and
> what connector is the target residence for the pins? Are you
> trying to install 22AWG (high density) pins with the 20AWG
> standard density) tool?
>
> Bob . . .
>
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