Mailing List flyrotary@lancaironline.net Message #33954
From: George Lendich <lendich@optusnet.com.au>
Subject: Re: [FlyRotary] Re: solder vs. crimp; was: Re: Latest EC2 updates, Installation n...
Date: Fri, 13 Oct 2006 18:55:23 +1000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
.  It takes
a lot longer - with a lot more waste - to get consistently good
solder joints, than it does to get good crimped joints with a
high-quality crimping tool.  When I get to that point, I'm
investing in an appropriate crimping tool; it will be less
expensive than the time and re-works I'd have to put into a
soldered system.

Best Regards,
Dale R.
 
Dale
After having some work done of the Motorbike and seeing the professional crimping tool - I'm totally with your opinion on this.
George (down under)

Charlie England wrote:
WRJJRS@aol.com wrote:

Charlie
This is one of those where people must agree to disagree. Get the proper crimpers, you need only buy them once. Far to many failures occur due to incidentals and ancillary systems. The milled pins or even the better rolled pins work with the crimper to form the best possible connection. The conductor is crimped in the pin and the insulator is captured by the "tails" of the pin forming a sort of strain relief. This isn't possible with the soldered pins regardless of how good your technique is. Even a perfect solder joint is more likely to break. We need solder joints on circuit boards but crimps are better for everything else. The US Navy now uses crimp connectors on everything. They can "afford" it of course at our expense. If you live in Florida or California's coastal area corrosion could be a factor. Any coastal area for that matter.
Bill Jepson

Having spent a lot of years repairing crimped connectors (built in a production environment in high dollar commercial products) with corrosion or stress riser broken wires, I can say with confidence that crimped connectors aren't immune to the problems attributed to soldered connections. I've repaired my share of 'cold' solder joints, too.

I'm just saying that neither is inherently superior to the other & neither is inherently more prone to failure from stress risers. The built-in strain relief in crimp connectors exists only in some specific brands & models of connectors. Without high quality connectors, tooling & training, crimped connections are failure prone due to both corrosion & stress risers.

Just a cautionary note that crimp isn't automatically 'quality'.


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