X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail04.syd.optusnet.com.au ([211.29.132.185] verified) by logan.com (CommuniGate Pro SMTP 5.1c.6) with ESMTPS id 1463310 for flyrotary@lancaironline.net; Fri, 13 Oct 2006 04:55:50 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.185; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-50-254.dsl.nsw.optusnet.com.au [220.236.50.254]) by mail04.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id k9D8tN4v017586 for ; Fri, 13 Oct 2006 18:55:24 +1000 Message-ID: <001501c6eea5$527e20d0$fe32ecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: solder vs. crimp; was: Re: Latest EC2 updates, Installation n... Date: Fri, 13 Oct 2006 18:55:23 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0012_01C6EEF9.233E2320" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Antivirus: avast! (VPS 0641-3, 12/10/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0012_01C6EEF9.233E2320 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable . It takes=20 a lot longer - with a lot more waste - to get consistently good=20 solder joints, than it does to get good crimped joints with a=20 high-quality crimping tool. When I get to that point, I'm=20 investing in an appropriate crimping tool; it will be less=20 expensive than the time and re-works I'd have to put into a=20 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:=20 WRJJRS@aol.com wrote:=20 Charlie=20 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.=20 Bill Jepson=20 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.=20 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.=20 Just a cautionary note that crimp isn't automatically 'quality'.=20 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_0012_01C6EEF9.233E2320 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
.  It takes
a lot longer - with a lot more waste - to = get=20 consistently good
solder joints, than it does to get good crimped = joints=20 with a
high-quality crimping tool.  When I get to that point, = I'm=20
investing in an appropriate crimping tool; it will be less =
expensive=20 than the time and re-works I'd have to put into a
soldered=20 system.

Best Regards,
Dale R.
 
Dale
After having some work done of the Motorbike and seeing the=20 professional crimping tool - I'm totally with your opinion on = this.
George (down under)

Charlie = England=20 wrote:=20
WRJJRS@aol.com wrote:

Charlie
This is one of those where = people=20 must agree to disagree. Get the proper crimpers, you need only = buy them=20 once. Far to many failures occur due to incidentals and = ancillary=20 systems. The milled pins or even the better rolled pins work = with the=20 crimper to form the best possible connection. The conductor is = crimped=20 in the pin and the insulator is captured by the "tails" of the = pin=20 forming a sort of strain relief. This isn't possible with the = soldered=20 pins regardless of how good your technique is. Even a perfect = solder=20 joint is more likely to break. We need solder joints on circuit = boards=20 but crimps are better for everything else. The US Navy now uses = crimp=20 connectors on everything. They can "afford" it of course at our = expense.=20 If you live in Florida or California's coastal area corrosion = could be a=20 factor. Any coastal area for that matter.
Bill Jepson=20

Having spent a lot of years repairing crimped = connectors (built in a production environment in high dollar = commercial=20 products) with corrosion or stress riser broken wires, I can say = with=20 confidence that crimped connectors aren't immune to the problems=20 attributed to soldered connections. I've repaired my share of = 'cold'=20 solder joints, too.

I'm just saying that neither is = inherently=20 superior to the other & neither is inherently more prone to = failure=20 from stress risers. The built-in strain relief in crimp connectors = exists=20 only in some specific brands & models of connectors. Without = high=20 quality connectors, tooling & training, crimped connections = are=20 failure prone due to both corrosion & stress risers. =

Just a=20 cautionary note that crimp isn't automatically 'quality'.=20 


--

Homepage:  http://www.flyrotary.com/

Archive and UnSub:   =
http://mail.lancaironline.net/lists/flyrotary/
<= /HTML> ------=_NextPart_000_0012_01C6EEF9.233E2320--