[HECTOR63]

Originally Posted by Pamphonica

The key to crimping these tiny connectors is to make sure thet the two arms of the crimp area fold right down in the middle and crush the wire properly. A bit like a rounded "B" in cross section. Just squeezing with pliers leaves a very weak joint.
I laboured for ages trying to get a good crimp on these tiny connectors with pliers and finally gave up and bought the Engineer PA-09 crimper. A seeming over-expensive and simple tool. But it has been perfectly designed and made to do excellent crimps, and works over quite a range of the smaller crimp connectors. A good investment if you are making lots of these crimps.
And I suggest you don't make the mistake I used to make of then soldering the crimped joint "just to make sure". This guarantees that the solder wicks up the wire, making a nice fracture point a little way up from the crimp!
-Jeremy

https://www.amazon.co.uk/ENGINEER-pa.../dp/B002AVVO7K

The price of Precision