eye spiceing 12 strand vectran / Amsteel
 

I am looking for some input on spliceing an eye in 12 strand synthetic. It seems that there are two diffrent types, unbrading the tai and braiding it back into itself, and then the taperered tail type. Any input as to which is easier and more functional. The uses are a dead ended toppinglift, and a snapshacke for an outhaul. Thanks!!

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Hello,
The tucked version is usually quite a bit more difficult, and is therefore employed when (a) the rope is constructed too tightly to allow a bury of the tail, tapered or otherwise, or (b) when length of the splice is a consideration -- the tucked version is much shorter. There are even hybrid versions.
Either version, properly done, can provide 100% strength. For your application, burying it is best. I like a long taper, and will put a Brummel in for shock-loaded items. Stitch carefully, too.
Fair leads,
Brion Toss

Samson calls Amsteel a "Class 2 - 12 strand" they call for a bury splice. I doubt that you could do a tuck splice on Amsteel.

http://www.samsonrope.com/index.cfm?page=28

I also like the Brummel as more insurance to help lock things together - Amsteel is easy to splice - remember the whipping even on the Brummel.

Oh, Samson
 

Hi there,
Yes, Samson says to bury it, but not because you can't tuck it, only because it is so much simpler, and length is not typically an issue. But you can splice any 12-strand by tucking groups of strands.
Fair leads,
Brion Toss

I have done a 'hybrid' (Samson or New England call it a "tuck-bury", which is half-and-half, as the name implies, and has directions for it), but one of the reps said they seek to discourage the tuck splices because the HM fibers tend to abrade one another where they cross at the tucks. I'd be interested to know if anyone has tested this, since I'm often looking for a shorter splice, esp. around tackles and such.

Might one taper quickly what is tucked (to lessen disruption)?

As for testing, given the rationale for avoidance (abrasion), this seems a case
where the testing you want is that of well-used splices, comparing the effects
of such abrasion-from-usage, and not just-spliced items in new rope(s).

--dl*
====

Benz,, In Alaska my crew always use the tuck splice. I do not have any photos, but they are shorter than this one,and the tucks are all locked in a way they bury it back on itself. Never had any problems. We use a lot of 1/2" stuff on the cranes and haulback winches. The really big stuff 1-1/4" we have them bury it before we get it....:-)

http://www.hampidjan.is/media/pdf/Dy..._with_head.pdf

http://www.hampidjan.is/media/PDF/08feb.pdf

http://www.hampidjan.is/media/PDF/Co...nuary_2009.pdf

Shameless pug....I see my boat made it on the Hamipjan website....:-)

Modified Brummel
 

I've been using the modified Brummel splice with 12 strand synthetics for light weight halyards. It's very easy to make, but how strong is it?

http://www.colligomarine.com/docs/mi...eb_rev_1_2.pdf

The eyes have it!
 

csandys

For standing rigging with Dynex Dux, that is spliced over a correctly designed eye, as long as the tail is buried 72 times the diam. of the line (per Brion toss recommendations). The results have shown Dux to break at the apex of the eye at 90% or better of the rated breaking strength. If you shorten the tail the load will come fwd to the locking tucks and break sooner..
I have never seen an eye break on Dynex or Spectra or Amsteel. It was always in the body of the line somewhere.