This is the important thing I think, stress relief on the cable. While I'm not sure about rules/protocol regarding two wires etc. I'm pretty sure it is a requirement in aerospace that all crimped connectors have stress relief as to mitigate the risk of connection failure due to mechanical stresses.Well being I rarely follow standard convention wherever possible I crimp and solder followed by having the wire itself properly supported near the connector so that it can't wiggle or flex.
1) Probably to keep the job requirements within the capabilities of the workers.aerospace and submarines have internal rules prohibiting the 2-wire technique in most situations.
When I was young (!) almost every installer of audio HI-FI components for cars was soldering after crimping. I don't know if this habit is lost nowdays, but I suspect is not.I've never seen a crimped connection soldered as well.
Yes, I think that stranded wires (cause of their internal structure) can allow micro-stretching whatever they are soldered or crimped. So I don't understand the point of AnalogKid about the military requirements... for sure it's my own limitation...I guess it doesn't hurt much if you can deal with the loss in bend radius due to solder flowing up inside the wire.
That's how I still do it and I have never hand one of my connections made that way fail and a few of them are pushing 20+ years in service in our old farm pickups.When I was young (!) almost every installer of audio HI-FI components for cars was soldering after crimping. I don't know if this habit is lost nowdays, but I suspect is not.
Stated with great confidence, but not correct. Note - I'm talking about a properly crimped ring terminal or Faston, crimped to the manufacturer's specs. The insulation crimp is part of the strain relief for the conductors, but serves no electrical purpose. When crimped correctly, the metal in the strands in the crimp zone flows and reforms This is called coining, and is what happens when coins are stamped. This is better than soldering because a) solder actually is not a very good conductor, and injecting it in between the strands decreases conductivity; and b) there is no wicking, which is the whole point of crimping.When you want to crimp two wires in the same crimp connector then the solder can provide extra-help against pullout forces, since the insulation crimp cannot firmly grab two insulated wires together.
Or it could come from 150 years of experience. In this case, one of the concerns is that the loss of a single connection point might take down multiple circuits. If a ring terminal breaks at its weakest point, the web between the barrel and the tongue, all of the wires in the barrel now are disconnected from whatever the tongue is connected to. Stacking up 4 wires with 4 individual rings means that the web failures are independent of each other. This increases weight (always a thing in aircraft) but increases reliability (always a bigger thing in aircraft) more.Could be some paranoid fear against breaking the rule #XYZ that would cause braking the rule #ZKY in the manual #WHZ? I mean... I know something about military furnitures and I know the general fear about doing something not stated, validated and signed on some document.
This is the magic word "properly". Nobody knows what it means, it changes from manufacturer to manufacturer...Stated with great confidence, but not correct. Note - I'm talking about a properly crimped ring terminal or Faston
Sure? Check how your semiconductor chips are soldered. Check Bismuto (used by IBM) properties.a) solder actually is not a very good conductor
Could be. But redundant connectors does not means "better" connectors, they simply means more tolerance against crashes and/or humans errors.Or it could come from 150 years of experience.
Wow this "things" are amazing!Not sure if this has been brought up already but would you consider a junction block instead of crimps? You can get some really nice slim ones with IP66/68 ratings like these older 1750 series from Amphenol. Of course Farnell has to be down for maintenance at the moment so I can't search for them
Yeah they are great I would love it if my car had racks of them in it , Amphenol make really good connectors but some are indeed ridiculously priced. Possible I slightly over engineered a solution thereWow this "things" are amazing!
Unfortunately I have to "interface" my cables with the pre-existing cables of the motorcycle, I cannot change them, I have to use them.
Also, costs are important. With crimped connector I can arrange a connection, let's say, at 50 cents per couple of pairs. By using that (lovely) parts I think that general costs should be multiplied by 5 or 10...
It could be a better world if every vehicle constructor would use connectors like that!
I love the way some people can sum the whole thing up in one sentence. Crimping is more reliable without solder. It has better pull-out strength without solder, resists corrosion creeping in between the strands better without solder, the conductivity of the joint is made worse by adding solder, and adding solder will make the connection fail sooner in the presence of vibration.Soldering doesn't make the joint more reliable - in fact, it is just the opposite.
If a person is a bad crimper and a bad solderer and has no decent crimping tools, I think the crimp plus solder will be the most reliable. On the other hand, a connector designed to solve the problem is likely the best solution. 3M makes all kinds of connectors and room temp curable sealants for splices and butt joints. I'm sure others do as well.Soldering doesn't make the joint more reliable - in fact, it is just the opposite. Crimping is a more reliable joint than soldering.
Hello SLK001, nice to hear you again.Soldering doesn't make the joint more reliable - in fact, it is just the opposite. Crimping is a more reliable joint than soldering.
I plan to make around 100 connections over two-poles AMP supersealed connectors as well as another 100 connections over TE-Connectivity connectors of the 070-series:how many amps are you looking to split off.
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by Jake Hertz
by Jake Hertz
by Jake Hertz