General > General Technical Chat
Problems with auto crimp terminal connectors
nctnico:
I fully agree with what tooki wrote above.
Get good contacts with the right crimping tools. When you do that, the end result will be better compared to soldering.
AVGresponding:
I would advise against buying things like this from ebay, unless you know the seller to be reputable and reliable. Far better to go to an electrical wholesalers like Edmundsons, CEF, etc, or an electronics supplier (will probably be more expensive for the same quality) like Rapid, Farnell, RS, etc.
EDIT: I specifically did not mention motor factors for a good reason; they will be ridiculously expensive for tiny quantities, or it will be garbage quality, or both.
deadlylover:
I like the TE Connectivity / AMP tooling with their PIDG terminals. Highly recommend setting up an eBay search alert for them (among other brands like JST, Panduit, Molex). Sometimes you can find surplus bags of their terminals for 30-60% cheaper than Mouser/Digikey too.
A while back I tested my battered old AMP 59250 when I got it. The pull out strength on a 22AWG wire with their 22-16AWG butt splice terminal was around 11kgf, which was basically the break strength of the wire. Yeah I think we all remember the days of using a $20 kit from an auto parts store...they all suck, it's a rite of passage hahaha. :P
soldar:
I have always called them Faston
https://en.wikipedia.org/wiki/FASTON_terminal
and I have never had problems with them in my personal use.
I have never really used them in professional designs for the public.
EPAIII:
You talk about bullet connectors but show a photo of spade types. Confusion!
But in both cases,
1. There IS a spring like connection. You probably destroyed that by soldering when the connector was only designed for crimping.
2. There are far more than two sizes. I've been three and had to work with the different ones. Each of these two types of quick disconnect has at least four different sizes, but there are probably more than that. And the different sizes are not made to connect to any of the others.
3. I have been using crimp connectors of many, many types for well over 45 years and I have NEVER, EVER gone to an auto store or a Chinese source for the crimping tool. These are electrical and electronic items so I go to professional ELECTRONIC and ELECTRICAL supply houses for NAME BRAND tools. Names like Amp, Amphenol, Molex, Panduit, etc. These are the people who invented these connectors and they know how to make a proper tool.
https://www.digikey.com/en/products/filter/terminals/spade-connectors/391?utm_adgroup=&utm_source=google&utm_medium=cpc&utm_campaign=PMax_DK%2BProduct_Product%20Categories%20-%20Top%2015&utm_term=&utm_content=&utm_id=go_cmp-19646629144_adg-_ad-__dev-c_ext-_prd-_sig-EAIaIQobChMIzJe794KghQMVVzPUAR3SrQM_EAAYASAAEgIjC_D_BwE&gad_source=5&gclid=EAIaIQobChMIzJe794KghQMVVzPUAR3SrQM_EAAYASAAEgIjC_D_BwE
https://www.digikey.com/en/products/filter/terminals/barrel-bullet-connectors/393?utm_adgroup=&utm_source=google&utm_medium=cpc&utm_campaign=PMax_DK%2BProduct_Product%20Categories%20-%20Top%2015&utm_term=&utm_content=&utm_id=go_cmp-19646629144_adg-_ad-__dev-c_ext-_prd-_sig-EAIaIQobChMIobHghYOghQMVrTbUAR1KnQV9EAAYASAAEgL50vD_BwE&gad_source=5&gclid=EAIaIQobChMIobHghYOghQMVrTbUAR1KnQV9EAAYASAAEgL50vD_BwE
4. All my crimping tools have either a ratchet or a pair of flat surfaces on the two sides that MUST be brought into contact in the crimping process. These devices ensure full closure of the dies in order to achieve a proper crimp. The flat surfaces are what all the cheap tools use and those tools are what too many people use due to cost. Those flat surfaces style tools are often not understood and are not fully closed when crimping.
5. Any crimped termination is a precision operation. The barrels of the terminals are only intended for a small range of wire sizes and the tools must match those barrels. When those conditions are met and the crimping dies are fully closed, you are guaranteed a gas tight connection. If they are not met, you have an unreliable connection which may fail for any of several reasons. Far too many people disregard these conditions and either use a terminal with too large of a barrel size or the improper tool, OR BOTH.
Properly applied, with the proper tools, crimped connections are as good as solder and many say they are better.
--- Quote from: robint on March 31, 2024, 12:39:20 am ---Has anyone else had these infuriating problems I experienced. This refers to the common old type crimped auto connectors, I just took for granted till this pm I was faced with making a but splice with bullet connector pair having wasted time finding the crimp pliers didnt provide a reliable grip I soldered the wire in then I found that I could not get the bullet to plug into the female ferrule part, whatever I tried, the clearances were far too tight.
So this sent me on a a wild waste of time trying to source a proper set of auto style connectors (formerly a Lucas design). Fleabay was totally flooded with Cheap Charlie copies - 100's of listings of the same product - never got to a real product - total waste of time. Then I tried ggle - again Cheap Charlie in your face , but I found some wholesalers who then presented me with an incomprehensible array of proprietary design requiring me to drill down into spec sheets to find a compatible male/female pair of a basic auto connector - plus of course 10x price gouging unless MOQ 1000+
I am still flailing my arms around at this stupidly basic problem. You see male and female have to fit together due to accurate tolerance/dimensions. There is no real spring, its an interference fit - or else a sloppy fit
All those cheap kits you buy try seeing if you can make a reliable connected pair - I never trusted them, but only for 12V non critical use - and then soldered
What is your experience |O Am I going mad? (Attachment Link)
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