Technora Double Braid Splice?

Matias

Matias

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So, I came up on a nice length of 100% technora double braid, and though I was only expecting it in chunks, it came to me as one continuous piece. I am thinking about the possibility of a lanyard, and would like to have a tight eye on it for that.
So, with a limited amount to play with, I'd like to maximize my odds of success by asking around here for any suggestions on details for said splice.
Thanks friends.
 
SeanRuel said:
samsonrope.com

How to Splice Rope | Rope Splicing Instructions & Tutorial

Access easy-to-follow tutorials and instructional videos on rope splicing, covering techniques for braided and synthetic ropes. Learn essential skills for safely and reliably splicing ropes in different industries.
samsonrope.com samsonrope.com
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Not really helpful bud. There's not just one way to splice, and different companies list different procedures. Samson only uses straight buries on class two 12 strand ropes, while Yale, who uses three rather than just two, recommends a locking brummel and shorter bury. Some list parallel core ropes as unsplicable, but New England has instructions for it. I am pretty sure that I could just do a simple uncovered eye splice in the core of this stuff I got, and will likely just do that, but I know that some of the folks around here have some tricks.
 
That diameter, I would put Samson’s Tuck-Bury splice, it only requires a fid and a half of bury, with only the loss of 1-2% of strength.
The cover may be able to be buried also, long enough of a bury might also improve the break strength.
If the cover is half the diameter, a true double braid, maybe a longer bury length class I splice would work. I’ve never had one tested though.
 
Brocky said:
That diameter, I would put Samson’s Tuck-Bury splice, it only requires a fid and a half of bury, with only the loss of 1-2% of strength.
The cover may be able to be buried also, long enough of a bury might also improve the break strength.
If the cover is half the diameter, a true double braid, maybe a longer bury length class I splice would work. I’ve never had one tested though.
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The longer length class 1 is what I was thinking about, but don't see any good instructions indicating how deep. I understand that I am asking for an educated guess, but how deep would you go to feel like you probably got enough stuffed in there. I will likely do a tuck bury on the core for eyes that need to minimize the bulking up of the rope, but for the lanyard I am not worried about bury length, but rather maximizing durability.
 
The core would have to have a similar braid as the cover for them both to stretch at the same rate to share the load, for a class I splice. If the core braid is longer, it would probably be stronger to use a class II splice. Looks to be a 10mm, that would make the core around 8mm, which in Technora is around 9-10 thousand pounds of strength.
 
Brocky said:
The core would have to have a similar braid as the cover for them both to stretch at the same rate to share the load, for a class I splice. If the core braid is longer, it would probably be stronger to use a class II splice. Looks to be a 10mm, that would make the core around 8mm, which in Technora is around 9-10 thousand pounds of strength.
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Those are interesting points that I have not yet read elsewhere. It's Sterling's H3 Tech125, almost a true half inch, though still somehow only rated at the same MBS as the matching size WorkPro, which is Poly/Nylon, and breaks at 45kN.

The crux in this will be the extracting the core; jacket feels pretty tough. I'm hoping to have time to work on it today, but whenever I get to it, I'll post a few pics.
 
Sometimes for the Class II it’s easier to pull the whole core out and reinsert through the eye, do the splice and then put the rest of the core back in the cover.
If doing the Class I double braid splice, I would do a 3 fid length bury of the cover, and double the length of the core bury.
 
So, I pretty quickly gave up on getting anything through that stiff jacket. The core seems to be only 8mm if I am measuring it accurately, so I am gonna say it is a true double braid. 20221101_124323.jpg
I think I will just do a tuck-bury in the core and cover the splice up to the eye. Nothing I plan to do with this stuff will ever see it used in a straight pull; always in some form of basket configuration.
 
It looks like it would be easy to make the eye covered, it’s easier to insert the core than extract. Or cover the eye with something else, polyester or nylon gives a neat appearance with the melted edges.
 
I'd be happy to send you a piece to play with @Brocky
I was thinking just that; to put a piece of the cover on the eye, even if it's not structurally integrated into the splice. I feel like it'd be beneficial for overall wear properties beyond looking nicer.
 
Another option is to put some polyurethane on the eyes, I recently tried it and was happy with the results.

Thanks for the offer, but I’ve spliced Bailout, an 8mm all technora, with similar construction. Spliced the core and cover separately also.
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WesSpur sent me some Bailout XL by accident, thinking it was Beeline 10mm. I spliced it with my usual measurements, and it ended up many inches shorter than in 10mm Beeline, presumably because of the shrinkage caused by stretching it as wide as it gets.
Have you had your bailout splices break tested? Obviously anyone with liability concerns has quickly told me NOT TO USE THAT! I counted 16 strands in the core, but it's clearly a hollow braid, so it worked out. Took me making two e2e before I was sure that it wasn't supposed to be such a bear.
I can imagine that something about the tighter bends in the denser braid might cause some internal weakness in HM fibers, but for an e2e, I'd think it should retain sufficient strength to be used safely.
 
The left one is Tuck-Bury on both ends, covered eyes with the cover tails whipped on the outside.
I’ve had the core only hitch cord tested, with locked brummels, one and a half fids of bury, it broke a little over 4100 lbs. The 8mm is rated at 4200 lbs, I’ve a Tuck-Bury one I’m going to send in for testing.
 
That's how I was planning on moving forward, as per your first suggestion. Is the 8mm bailout also a 16 strand hollow braided core?
 
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