Wire splice terminals ferrule crimp connectors - soft metal issue

[Kabelsalat]

I've recently just got this set of crimping connectors from Ebay <link>.

Have a look at image 2 on that page. I have a Knipex multicrimp tool with a proper tool that put marks just like in the picture and the wire used also fit into that crimp connector.

However, in practice it turns out that the crimping connectors doesn't keep the wire properly, so I can easily pull it out after crimping. Probably the crimping connectors is just too soft a material.

However - I do have a hexagon ferrule crimping tool, using that tool make an almost perfect result. The drawback using that tool however, is that the wire on at least one side of the crimp connector must be fully retractable through the ferrule crimping tool.
That is - as long as one wire can be pulled all the way back through the crimp tool after splicing, all is well and good.

I tested 3 of the replaceable mouth pieces on my Knipex multicrimp tool, but with no great success (material too soft, also when using the mouth piece for wire ferrules).

Any idea what other crimping tool may give the best result for these splicing connectors ?

 

[Bluejets]

Junk crimp links.
Bin them and buy some decent ones.

 

[Kiwi]

I would be more inclined to suspect insufficient crimping pressure if you can pull the wires out.

 

[Kabelsalat]

Junk crimp links.

I'm inclined to agree on that.

I would be more inclined to suspect insufficient crimping pressure if you can pull the wires out.

Well, it is a decent German press tool I bought myself, and I felt the pressure in my hands, so the pressure was good.

 

[Kabelsalat]

Ok, just found a solution for this.

So I have a small plier that (was never intended for this purpose at phurcase) have the U-shaped press form. And it turns out twisting the wire before insert into the crimp connector AND use this simple pliers so that the cross section take the shape of an "U".
And it actually turns out to hold the wire firmly in place this time.

The pliers I think cost no more than about 7$ (some guessing at the currency rate at the time).

This shows that some times the simplest tools are the best solutions


Found a online image of a very similar pliers

https://www.pikeshop.de/images/thumbnail/produkte/medium/et180/et180_front1_org1280.jpg

seems the term for this tools are "predator tacle/pistol pliers", "Recon pliers" amongst other terms used on similar pliers.


[edit]
I have a slight suspicion that the item sold as "Wire splice terminals ferrule crimp connectors" are actually meant for splicing fishing lines.

 

[Delta Prime]

I have a slight suspicion that the item sold as "Wire splice terminals ferrule crimp connectors" are actually meant for splicing fishing lines.

Or to keep split shots or sinkers from sliding down the fishing line?
A type of backing barrel.
But that’s a bit of a stretch…
I think they’re just cheap butt connectors.

 

[Harald Kapp]

The image on the website you linked to in post #1 definitely refers to electrical wires, not fishing lines:

 

[EddyFiRa]

The issue with soft metals in wire splice terminals and ferrule crimp connectors often comes down to durability and proper contact. Soft metals can lead to poor connections, corrosion, or degradation over time, especially in high-stress environments. It's important to choose the right materials and ensure a solid crimp to avoid reliability issues.