Documenting my hand-sewn eye process

Well..... I do have coming, what I hope is an improvement for the Bone. What it needs is a gear manufacturer to come on board.
 
SoftBankHawks said:
The multiscenders are stuck in an ever deepening hole and seem to refuse to come out. They are our gay uncle that nobody really wants to talk seriously about. I've just finished a 10 day arb trek to the UK and Germany and it is shocking how irrelevant they are. By their current definition they have no value within the european and UK industry. I would rather see hand-stitching fully quantified than kept as a secret in the closet.
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Paul are you referring to the various homegrown multicenders not getting appropriate European certifications?

I agree on the hand-stitching. I don't see any financial incentives/funding for that process to move forward with hand-stitching. It will have to be a labor of love in between working for a living. Maybe I'm not good at thinking out of the box in financial terms ;-)
-AJ
 
moss said:
Paul are you referring to the various homegrown multicenders not getting appropriate European certifications?

I agree on the hand-stitching. I don't see any financial incentives/funding for that process to move forward with hand-stitching. It will have to be a labor of love in between working for a living. Maybe I'm not good at thinking out of the box in financial terms ;-)
-AJ
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It is always a labour of love, that's how it must begin Andrew. There is a great energy at the start of projects that some people forget, some don't. Quantifying hand stitching is way down on my list but it can be done. I managed to grab Chris Cowell (Treemagineers) while in Germany and he was most helpful with my questions about setting up test scenarios for SRT anchors. Eric needs a workshop creating. Just got a new skateboard...etc etc
umm, yes, the homegrown and still at home multiscenders.
 
I don't think we should be too harsh with Mr. Bonner, he is expressing his opinion based on the knowledge he has gained from his unique position. Everyone is entitled to their own personal opinion.

I ,however, disagree with him. I believe hand sewn eyes can be made as consistently strong as the machine made.

One thing I'd like to know is if all machine sewn eyes have the same breaking strength when tested, if using same rope and sewn splice of course.

I also thought of the John Henry comparison, and then I wondered if perhaps this is how the whole Terminator program got started.
 
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Brocky said:
I don't think we should be too harsh with Mr. Bonner, he is expressing his opinion based on the knowledge he has gained from his unique position. Everyone is entitled to their own personal opinion.
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This is very true. But you don't have to be a jerk about it either when you express it...
 
TimBr said:
@evo; What was it you were seeing that alarmed you, and caused you to chuck the splice? Loose stitching? Or something else? I'm just looking for a clue here, to help me when I do my own examinations of such gear.

Thanks in advance for your time, and for any answers you choose to give.

Tim
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The big one was a petzl sewn bridge, it had about 1/4 of slop wiggling back and forth. I've also have received sewn splices with up 1/2 difference in length of stitching. And a few with eye's that are too big, which isn't a big deal but sucks with a hitch cord.
 
evo said:
The big one was a petzl sewn bridge, it had about 1/4 of slop wiggling back and forth. I've also have received sewn splices with up 1/2 difference in length of stitching. And a few with eye's that are too big, which isn't a big deal but sucks with a hitch cord.
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Ha, Petzl sewn-eye bridge is one of the worst. I was a bit shocked when I handled one in an arb gear shop, I didn't buy it ;-) Be curious to see a pull test on those eyes.
 
You're right Evo, I forgot about that post of his.

The sewn splices on the Adjust lanyard I recently got were tight with good stitching. I took the splice apart and counted 103 stitches. Instead of separate passes it was done in a single pass with the length of each stitch changing as it went. The thread was dyneema.

Edit: Should have added that my guesstamation of the thread breaking strength is 50#.
 
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yoyoman said:
Some are rated for only the basket configuration, others end to end. It's not a very clear standard in the US IMO.
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I'm talking about hitch cords, and climbing lines. One end is has more stitching than the other end, I'm not counting the threads but it's noticeable.

I just rather splice my own ropes and call it good. I've called some dealers and they only test life support splices to the 5,400 standard, and not the breaking straight of the rope. This info came out when researching the kernmaster splices.
 
Brocky said:
Do hitch cords only have to test to 2700# since they are generally used in a basket configuration?
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That's the thing, depends on which standard they use, EU or ANSI and ANSI is not very clear where as the EU standard is very clear about which standard applies to basket configuration. Take a look at the CELanyard and the standards specified there. I have noticed some US makers starting to put a diagram of the basket configuration on the splice to make it more clear when it is used.
 
Brocky said:
So, straight pull is 20 kN and basket is 15 kN. Just a 5 kN difference, not half.
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Why does the line have to be rated to 5400 (24kn) if a terminal eye only has to be rated to 20kn? That strikes me as off. The 15kn for something used in a basket configuration is definitely bomber though.
 
A hitch cord isn't used over a pulley, normally, so I'm guessing that because you can't really know whether each end of the cord is being loaded equally, they decided to err in favor of a bigger safety margin. That's pure speculation, but seems a likely possibility.
 
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