Electronics > Projects, Designs, and Technical Stuff

Insulated crimp terminal diameter issue, KNIPEX / Molex / TE / AMP

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Benta:
I tried those connectors out 25 years ago. They were useless then and they're useless now, no matter which brand or crimp tool you use.
The idea/design is faulty from the start and no serious engineer would ever use them.

Functioning crimp connections use the "4-tab fold-in" design, like these:

Insulation is done with tailored sleeves or heat-shrink tubing.

mzzj:

--- Quote from: Benta on February 18, 2020, 08:10:43 pm ---I tried those connectors out 25 years ago. They were useless then and they're useless now, no matter which brand or crimp tool you use.
The idea/design is faulty from the start and no serious engineer would ever use them.

Functioning crimp connections use the "4-tab fold-in" design, like these:

Insulation is done with tailored sleeves or heat-shrink tubing.

--- End quote ---
Bollocks. Proper combination has higher strenght than the cable itself.
Been there, measured on pull-out force tester..

Yansi:
I second that I have never had any problems with the color plastic coded crimp terminals.  I have used both the rings, forks and fastons. Never had any issue. 

Even the whole power electronics lab in the university where I have studied runs on these style of crimp terminals on almost all test jigs.

And you can rest assured you are not going to pull the wire out of the crimp when properly crimped.

Benta:

--- Quote from: mzzj on February 18, 2020, 08:42:51 pm ---
Bollocks. Proper combination has higher strenght than the cable itself.
Been there, measured on pull-out force tester..

--- End quote ---

Watch your language.

Apart from that, I've yet to see professionals using those "DIY-Supermarket" insulated connectors.
Automotive? Nope.
Industrial? Nope.
Consumer? Nope.
...

Please tell me in which professional equipment they're to be found.

Monkeh:
"DIY-Supermarket" -> $400 crimp tool. Errr..

IME they're mostly seen in retrofit and small volume as they're less labour intensive and don't require you to remember to slip an extra shroud over the cable. Mass production does usually use discrete terminals and shrouds, presumably they're cheaper.

Proper matching of tool, crimp, and cable and insulation size results in perfectly acceptable crimps. Less proper matching can work well, can also backfire immensely. And apparently, Molex need a cluebat application.

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