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Test Equipment Anonymous (TEA) group therapy thread
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Vince:
Forgive the dumb question, but why not just put that tool in a vice to squeeze it smoothly instead of hammering it ?!  :-//
The smooth progressive action of the vice would be kind to the lug wouldn't it.

I mean a real big/full size garage vice of course, not the tiny vice we use in the lab, that goes without saying ! ;D
AVGresponding:

--- Quote from: Zucca on July 01, 2022, 01:39:19 am ---

Interesting the first comment....


--- Quote ---I like to solder all my lugs on for an even better connection.  And in the example at the end where you cut through the 4 - 0 lug, you chose a location where it had not been crimped thereby showing an uncrimped gap inside.  Not a nice demonstration.  Solder has always been superior to crimp, throughout the history of cable lug use.  Not sure where you went to school but we actually tested crimped vs soldered connections for resistance and noticed failures in current draw tests.  The solder, when done correctly always produced better results than crimps when done correctly.  In most applications, either will suffice.  However, for pure results solder wins.  Silver based solder is 5% more conductive than copper (copper 100%, silver 105% using copper as the standard conductor).  Heating wire tends to distort the insulator so care must be used.  I like to use a wet rag to cover the insulation near the end or an cooling paste which is available from most HVAC wholesalers.  Silver requires a bit more heat than propane, though so most opt for the crimp.  We're talking about the purest method here...in real life and in most situations the crimp will suffice.  Its important to know the composition of the lug being used as well.  Some are made of aluminum while some are copper and other's copper with a tinned coating.  Best to choose one with copper, either bare or tinned, since aluminum tends to oxidize over time which creates friction within the lug.  I've seen 'em glowing red like a toaster element from bad connection.  I got about 50 years experience in this subject.
--- End quote ---

--- End quote ---

Ok, I just got around to watching the video, and there are three points I care to make.

1. That fly was the star of the show, it trolled the **** out of him!   :-DD

2. He didn't crimp the lug correctly, and it wasn't because it was a cheap tool. You do NOT crimp to the tip of the wire, you only ever crimp BEHIND it. This is so the conductor forms a wedge in front of the crimp, preventing any realistic possibility of the cable pulling out of the crimp.

3. That was a crimp only lug. The ones that are intended for crimp or solder have a relief hole at the front, like the second one he sectioned.
Cerebus:

--- Quote from: Cubdriver on July 01, 2022, 03:13:39 am ---
--- Quote from: Cerebus on July 01, 2022, 03:05:54 am ---Talking of ginger and white cats. About 30 minutes ago the living room curtains twitched and about five feet off the ground a furry ginger and white face poked through them. We're not on the ground floor, and we don't have a ginger and white cat. Window now shut to keep the furry burglar out.

--- End quote ---

See, now that was a missed opportunity - you could have had a ginger and white cat, but you blew it!  :palm:

They make excellent lab assistants.
 :-DD

-Pat

--- End quote ---

No, I could have had Madam (Madam of the furry variety, not Madam of the human variety) telling him to "GET OUT AND STAY OUT!" in the time honoured  claws and teeth fashion. She is not a fan of Ging (as we call him, to differentiate him from the similar looking Mr. Baker, also of the neighbourhood). He has snuck into the house several times recently, but so far he's been lucky or calculating enough to have done so only when Madam has been out. He's a stray/feral and will happily sit and look at me through a pane of glass, but won't let me get closer than about two feet if there isn't a pane of glass separating us.
bd139:

--- Quote from: Cerebus on July 01, 2022, 02:33:10 pm ---Madam of the furry variety, not Madam of the human variety

--- End quote ---

Fortunately that was (furry && !human) and not (furry && human)  :-DD
mnementh:

--- Quote from: Vince on July 01, 2022, 02:01:39 pm ---Forgive the dumb question, but why not just put that tool in a vice to squeeze it smoothly instead of hammering it ?!  :-//
The smooth progressive action of the vice would be kind to the lug wouldn't it.

I mean a real big/full size garage vice of course, not the tiny vice we use in the lab, that goes without saying ! ;D
--- End quote ---

Because of how they work. To correctly crimp any crimp, you need to squeeze evenly from all sides at once. This kind of crimper was devised as a half-measure, to get a maybe-OK half-assed crimp without spending the big bucks on a proper industrial crimper. The core problem is that the action doesn't only compress, but rather is a wedge that acts to split as much as it does to compress.

Because of this, it relies on the integral strength of the lug to "get away with doing it wrong". With the race to the bottom in everything, including making things like lugs of the thinnest material we can get away with, you can't count on that anymore.

mnem
Just say "No, thank you" to crappy crimpers, no matter how cheap or expensive they are.
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