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tonyrenshaw268(at)gmail.c
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 Posted: Tue Apr 30, 2013 2:29 am Post subject: Electrical Connectors |
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Hi,
Back on the horse after being thrown yet again, I would like to seek advice regarding electrical connectors. I recall that the better ones were translucent and have dual crimps, on both insulated, and I insulated wire. I would like to mail order some from a US supplier and have them ant to my hotel for my next upcoming visit, and was hoping I could get some advice of suitable suppliers other than the old faithful, Spruce. Thanks in anticipation.
Regards
Tony Renshaw
Sent from my iPad
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rowlandcarson(at)gmail.co
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| Posted: Tue Apr 30, 2013 6:36 am Post subject: Electrical Connectors |
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On 30 Apr 2013, at 11:29, Tony Renshaw wrote:
| Quote: | I would like to seek advice regarding electrical connectors. I recall that the better ones were translucent and have dual crimps
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Tony - what you are seeking is a crimp with an extended metal barrel which grips the wire insulation when crimped as well as the conductor.
If the insulation is not gripped firmly by the crimp, vibration or flexing can cause strands of wire to fail from fatigue, similar to (but much slower in action than) an unsupported solder termination. The plastic part of an inferior crimp appears to crush down and grip the insulation, but the grip is poor and can soon become non-existent as the plastic relaxes back to its pre-crimped state. That relaxation is accelerated by heat.
The only reliable term I have found to identify the good crimp terminals is "PIDG" which I think stands for "pre-insulated diamond grip" although that does not convey much about the specific features we want. There are others but it's hard to know if they are the desired type without having one in your hand!
If the insulation is translucent it does let you see at a glance if the terminal has the required extended sleeve, but it's easy enough to visually check the ones with opaque insulation too.
In my searches for the several different types of crimps I need* I have used various suppliers in UK for crimp terminals such as Parts for Aircraft, RS, & Farnell. The types stocked by each don't seem to be very consistent and I often have to look quite carefully at the online data sheet to ensure that I'm ordering what I want.
Finally, a ratchet crimp tool is excellent for making sure that all crimps are fully compressed. You do have to remember which way round the crimps fit in it - the inner and outer parts of the crimping die are different shapes and although the result might look OK, the wire will pull out quite easily.
I'm sorry that despite the length of my post, I can't give advice about suppliers in USA, but doubtless others can do that. I hope some of the above may help you when trawling through suppliers' part listings.
*mixtures of: red (16-22AWG) and yellow (10-12 AWG) with 6.35mm blade, 3mm ring, 3.5mm ring, 4mm ring, 5mm ring, 6mm ring, 8mm ring, 10mm ring. this is because many of my electrical items have screw terminals rather than blade connectors.
in friendship
Rowland
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Fred Klein
Joined: 26 Mar 2012
Posts: 503
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| Posted: Tue Apr 30, 2013 7:09 am Post subject: Electrical Connectors |
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On Apr 30, 2013, at 3:29 AM, Tony Renshaw wrote:
| Quote: | | was hoping I could get some advice of suitable suppliers other than the old faithful, Spruce. |
Hi Tony...try Googling Steinair...I've ordered from them...good service, good prices...Cheers, Fred
[quote][b]
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AirEupora
Joined: 01 Nov 2009
Posts: 186
Location: Dixon, CA
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| Posted: Wed May 01, 2013 6:39 am Post subject: Re: Electrical Connectors |
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Tony, there is a company here the U.S. that sells everything electrical.
Allied
Alliededelec.com
Their catalog weight ten pounds and has 2176 pages. Four and half pages in the index is for connectors. It's a little hard to use their website if you don't know the names or part number and spec for what your are looking for, but they have salesperson at the 1-800-433.5700 that ready try to help you. I bought most of my connectors and pins here.
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Wed May 01, 2013 3:31 pm Post subject: Re: Electrical Connectors |
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Hi Tony,
What you are seeking is know formally as PIDG crimp connectors.
A major OEM of aerospace quality connectors is AMP (a division of TYCO)
They are available from all major electronics supply houses. Do not use
automotive grade connectors with vinyl sleeve, but rather use connectors
with a nylon sleeve. Also use a rachet cycling crimp tool
Here are some web sites:
http://www.ttiinc.com/object/Tyco-Electronics-Fully-Insulated-PIDG-FASTON-Connectors
http://www.te.com/catalog/minf/en/776
http://www.digikey.com/product-search/en/connectors-interconnects/terminals-ring-connectors/1442844?k=PIDG&vendor=17
http://www.mouser.com/search/Refine.aspx?Ntt=AMP+PIDG+Terminals
http://www.terminaltown.com/Pages/Page59.html
You did not say where in the states you were going, but if Florida, stop at
Skycrafter Surplus on Fairbanks, just of I4 in Orlando
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h&jeuropa
Joined: 07 Nov 2006
Posts: 645
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| Posted: Thu May 02, 2013 6:27 am Post subject: Re: Electrical Connectors |
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Tony,
Suppliers like Allied, Mouser and DigiKey are wholesale electronics suppliers and while they have the terminals you want, they typically sell in large quantities and the have the entire product line so selection is sometimes confusing.
I've found Stein Air (http://www.steinair.com/store.cfm?tlcatid=26) and B&C Speciality (http://www.bandc.biz/electrical-terminals-splices.aspx) to have the correct terminals at reasonable prices and reasonable quantities.
They both sell the proper crimp tools.
For some items one will be lower priced than the other. Be sure to check shipping charges - I recall B & C is a bit more expensive.
I've not used terminal town.
Jim Butcher
N241BW
XS Mono 914
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Thu May 02, 2013 2:03 pm Post subject: Re: Electrical Connectors |
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Hi All,
Jim, I have to respectfully disagree. I buy small quantities of parts from
Allied, Jameco, Digikey, etc. all the time. They are gracious and timely, and
probably have more stock and faster shipping than the Mom and Pop shops
you advocation. When you you say "typically" I have to wonder if that
means you never personally tried to buy anything from them.
I have also patronized B&C, RST Eng, Bob Nuckolls, Eric Jones (Perihelion)
and others too without much ado.
I personally would draw the line at Stein. His articles in Kitplanes etc
have been erroneous, biased and self-serving in the past. It is a personal
choice of course, but I do not like his style of business.
Your mileage may vary. My mileage is based on decades as a ham and
several degrees in electrical engineering. My wife would certainly attest that
have "rich" experience spending money 
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budyerly(at)msn.com
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| Posted: Thu May 02, 2013 6:03 pm Post subject: Electrical Connectors |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> If I can butt in,
These are all excellent sources and I too use Allied for a bulk of my connectors, pins, plugs etc. Good price and timely shipping in the States. I don't know about overseas.
However, please pay attention to the crimper tool also. The best connector in the world is only as good as the crimp.
You get what you pay for but you don't have to get fleeced. AMP makes a terrific PIDGE connector crimper, but at $400 I prefer my Eclipse thank you at 1/10th that. I rarely have more than one bad crimp in 100.
If you prefer solder, don't scrimp there either. Not all pins are created equal, nor is the solder. Learn before you burn.
Regards,
Bud Yerly
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