Electronics > Mechanical & Automation Engineering

af8 crimp tool tightening?

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Kjelt:
Yes if you have the right tools for a barrel crimp connector I would always prefer that to the folded versions.

What I am wondering and unsure about is the wire strain relief.
In a folded crimp you have one crimp for the conducting core wire and one for the jacket.
In MIL spec connectors probably the connector itself takes care of the cable strain relief so the individual wires are not strained.

The other aspect is inspection. For the MIL spec closed barrel connectors there is a small hole where you can check if the wire was long enough.
The conducting wire should also be seen 1/64th of an inch before the barrel starts. So not possible to do a visible wirestrain relief crimp.

tooki:
There are machined contacts that include a strain relief crimp. However, I suspect they’ve been obsolete for a while, as I haven’t seen any modern contact, nor any in the common mil-spec connector series, that use them. I wonder if they caused issues of some sort.

The only similar thing that I’ve seen today are the coaxial contacts, which are an entire coax connector that fits into a contact cavity. Those use a shield crimp, which also acts as strain relief.

tooki:

--- Quote from: Kjelt on January 13, 2024, 08:23:38 am ---But why do they sell hundreds of turrets (one for every connector type) each costing over $150 ? I mean the only thing it does is holding the barrel centralized and in the right distance for the crimp.

--- End quote ---
Admittedly, that “only thing” is critical to the process.

But like seemingly all crimp tooling, manufacturers just love to sell you another tool (or locator) with some trivial change rather than tell you which existing tool will work fine.

I have a genuine Daniels AFM8 but use it with Chinese clone locators, which are vastly cheaper. Among them is the “universal” locator which works with many larger contacts, but not with tiny ones. I’ve been meaning to make some locators of my own, to get practice with turning things on a lathe. The drawings for all the mil-spec locators and crimp tools are online. (Not the latest revisions, but I doubt anything significant has changed.)

Kjelt:

--- Quote from: tooki on April 06, 2024, 01:27:15 pm ---I have a genuine Daniels AFM8 but use it with Chinese clone locators, which are vastly cheaper.
--- End quote ---
Yes I found out and bought one on luck on aliexpress from Jrready and it worked fine.
 :-+

tooki:

--- Quote from: Kjelt on April 06, 2024, 06:44:02 pm ---
--- Quote from: tooki on April 06, 2024, 01:27:15 pm ---I have a genuine Daniels AFM8 but use it with Chinese clone locators, which are vastly cheaper.
--- End quote ---
Yes I found out and bought one on luck on aliexpress from Jrready and it worked fine.
 :-+

--- End quote ---
Jready is the only major Chinese AliExpress vendor of “real” indent crimpers. Iwiss makes a few, but not the fairly complete set (of the three basic tools) that Jready has.

I had one Jready locator which had one bayonet pin too long. I filed it down a bit and then it fit fine. In terms of the precision of the working end of the locators, they seem fine.

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