A further instalment…
The above (Socata original crimps) shows that to correctly crimp the cable strain relief portion of the PIDG terminal, you need the right tool for that. It’s obvious that most tools people use don’t do this. The tool at the top of my post #31 doesn’t, even though (I did tests today with various avionics wires) it does the wire portion just fine.
The tools in my posts #33 and #34 won’t do it either… they just squash the insulation a bit.
To do the cable strain relief correctly, one needs a tool which I haven’t seen yet. Perversely I was able to do it quite well by using the wire side of the tool to do the insulation side, but that isn’t going to work for most terminals
These tools have an adjustable jaw for the insulation barrel
More digging suggests such tools are rare. For example this one, from AMP, 90 quid, does not have an adjustable insulation crimp section
With a 2 month delivery time clearly it is in heavy demand
No wonder few people know about this, let alone use it
I have just received the RS tool mentioned above. It is just the same as the other cheap tools.
As they say: every day is a school day.
Peter – the AMP/TE tools for PIDG terminals all cost in the order of a few hundred pounds. They are superbly well made, but I suspect that the tiny volumes are the main reason for the high price.
There are usually several for sale on eBay. I got one for the red terminals (16-22 awg I think) for €10 and about the same for delivery. It is in beautiful condition. The red terminals are those used on a JPI engine analyser harness.
PS – if you take the route of buying secondhand, I’d advise buying a tool for each connector size and not one that can do 2 or 3 sizes
You get most types of connectors in bare types as well so you can use some other crimping tool that produces better joints. With some heat shrink the finish is a lot nicer
I think so, too, but I would also recommend to use heat shrink tubing with adhesive on the inside – it provides a much better strain relief.
I can’t see how the insulation grip side of it is adjustable, or even how to relate the tool P/N to the crimp P/N. Unless one buys the crimp terminals from AMP too… which is what does happen with the more specialised crimps from e.g. Positronic.
Edit: I think the two pins come out – same on this one
Basically the problem is that all the tools AMP/TE list currently don’t relate to the tools which come up on Ebay. I see a 20-16 and a 20-18 for example; above two links.
Last edit: Looking at the RS page for the AMP/TE terminal I actually have, they list various tools at various prices, from 30 to 457 quid. Looking at them, it’s clear that only the 457 quid one has the adjustable insulation crimp. No wonder we get all the weird variations in the field. Also the tools on Ebay (which are mostly ex military, probably from closed RAF based like Swanton Morley from where my Positronic/DMC one came from) are very specific tools for very specific terminals.
Peter – there are indeed dozens of different types of these tools. I found this list helpful to make sense for the job I wanted to do: here
For what I needed, I bought a 47386 and one other, the details of which I forget. Some listings on eBay are definitely in the spirit of “give this old tool a new home”, which is how I paid €10 for my one. There are lots of these tools in the US for about $50.
PS – you said “reassuringly expensive” earlier. One thing of note, and not obvious from the pictures, is that these tools are reassuringly long in comparison with things like the CK tool.
The RS tool I referenced above doesn’t have enough leverage to do the yellow terminals, unless you are built like a gorilla. The other one, post 31, does them easily enough. Very odd…
That’s a very useful doc – many thanks for finding that Alan. However I still on’t get how to find the right ool for e.g. RS 457-5097 which is AMP P/N 36151. That guide doesn’t list 36151. Also it shows multiple toold for the same thing – possibly these are the differently priced options, but it would be funny if AMP were recommending someone using a tool which doesn’t do the insulation crimp. It looks like 47386 is one option for 22-16 awg and at 400+ quid it is probably the right one
And, yeah, old ones do come up on Ebay.
Many thanks wigglyamp. Amazing how long it took just to get to this tool P/N. I had already ordered one on Ebay from the USA for about 70 quid the lot. But I will try to borrow it in the meantime. I know Adrian well