Inscribing gear

i'd say the safety over the gate, non-bearing sleeve as shown is right. Worst place would be curved points or sculpted angular design for structure to aluminum.

But, devil's advocate; there are just 2 pins to gate, loaded across column structure (leveraged)that the gate pivots on and connects to. The gate strength above the strength of the lesser of the 2 pins loaded crossways starts to become overkill, to chase in respect to the strength of the rest of the system. /forum/images/graemlins/confused.gif
 
Dave you are absolutely correct.Iam not suggesting that anyone should go out and start removing material from there carabinas.I am only saying what I have read.I myself mark them on the gate casing.When we talk of engraving I'm talking about using a small scribe and scratching a shallow mark or number for identification purposes.

Didj
 
On a thread in rec.climbing a fellow who was a metalurgist and climber went into detail about the materials that are used to make biners. I wish that I could pull that up but it's buried.

When I was working as a machine assembler I broke off three taps in one day. The foreman was very patient with me. He showed me a few cool tricks for extracting the broken taps. The best thing Ralph taught me was to think of the taps as icicles. If you poke an icicle into a hole it does fine. Just don't bend it. That's when I started to understand metallurgy.

From what was discussed in the rec. thread and after talking with Denny I understand that the aluminum in biners is very flexible and not brittle. Without having a grasp of the language of metallurgy I can't describe what we should be looking at.

I agree with everyone about engraving or scribing on the gate sleeve. Seems the best way. Well, second best. Until someone else uses pink spray paint I know which gear is mine :)
 
For those arguing against inscribing- I see more damage being caused if I were to drop a 'biner on the sidewalk while standing on the sidewalk.

It is ridiculous to think all those 'biners should be retired due to the tiny dings or scratches they sustained in that 3' fall to the concrete.

Dave- the example you gave of the steel column really strikes a chord, but I'm not sure it relates. Have we ever heard of a 'biner failing as a result of a tiny ding?

I just see this as part of the SWL. We scale everything up quite a bit to account for all these little things that could add up to something signifigant. I would be concerned if I was using a 170lb carabiner. Then a scratch that reduces things 3% WOULD break when I hung on it.

Just tryin' to keep it real!

love
nick
 
Thanks for all the input. I tend to agree with the view that it'd be best not to inscribe anything on any load bearing part of the carabiner, but I would still be interested to see some controlled study to support this.

Tom, since you couldn't view the file you attached-- it deals with the inadvertent opening of three way carabiners, and preventing the rope from wandering in the 'biner. It's an interesting report, but didn't address what happens to the strength of a 'biner (or other piece of gear) when they are inscribed after manufacture.

I use purple electric tape.
 
i think gates can be replaced with wire gates and not much strength loss because that is the thickness of the hinge and pins holding a regular gate anyway. i think the wire gate properly loaded would pull unleveraged down the wire gate, but leveraged against same hinge pin (of same size as wire gate pull unlevraged), so hinge pin would still fail first i think.

So, that a non wire gate is excess strength, beyond that of the much smaller wire sized hinge pivot being pulled at leveraged angle as weakest link in that chain. i don't beleive that marking a full sized gate would weaken it to below a wire gate pulled unleveraged or a matching sized pin pulled leverged (hinge, catch).
 
When did they do away with the ball locks? They're still touting them at their website. Am I going to have to stock up on them, Mark?

Glen
 
Just because I love you guys so much, I'll endure uploading this 1/2MB page 11/11 from this document off their web:
<font class="small">Code:</font><hr /><pre>Title: POUR PDF dépliant mousquetons
Creator: Adobe InDesign CS (3.0)
Producer: Adobe PDF Library 6.0
CreationDate: Mon Apr 11 13:59:01 2005
ModDate: Mon Apr 11 14:01:48 2005
Tagged: no
Pages: 11
Encrypted: no
Page size: 680.315 x 651.969 pts
File size: 4338205 bytes
Optimized: no
PDF version: 1.3</pre><hr />
(Colin has got to fix the font declaration for preformatted text. It should be fixed-width characters, which would yield properly-aligned columns!)

Glen
 

Attachments

The point of that post was to show that in a document created less than 2 months ago, the ball lock carabiner is in the line-up and is CE certified. From what I gather the (new?) "spinball" gate is a screw gate that uses a ball lock to prevent unscrewing. If that's in fact what it is, unless the thread pitch is finer than on the "standard" model, the larger diameter of the gate mechanism should yield a quicker closure process, as well.

Not that I hope you're wrong just for the sake of having you be wrong, Mark, but I hope you're wrong! :)

Glen
 
[ QUOTE ]
The point of that post was to show that in a document created less than 2 months ago, the ball lock carabiner is in the line-up and is CE certified. From what I gather the (new?) "spinball" gate is a screw gate that uses a ball lock to prevent unscrewing. If that's in fact what it is, unless the thread pitch is finer than on the "standard" model, the larger diameter of the gate mechanism should yield a quicker closure process, as well.

Not that I hope you're wrong just for the sake of having you be wrong, Mark, but I hope you're wrong! :)

Glen

[/ QUOTE ] /forum/images/graemlins/avid.gif
 
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