Really? Not that I looked but, would have never imagined you could mend synthetic winch line. Good to know as I have a winch with syn line on the way.
I was hoping that the Samson instructions would show up in all their glory. It's actually very simple and straight forward to splice 12 strand. Splicing also retains about 85-95% of the line's original strength.
Let's try this:
12-Strand Single Braid Bury Eye Splice
Rope splicing is a very strong method of fixing a loop eye; as the rope is pulled tighter so the spliced strands become more and more squeezed and locked into place. Rope splicing removes the worry of a knot becoming undone and a spliced eye is less bulky. You can buy 3-strand, 8-strand or 12-strand rope with an eye already spliced in or you you can make your own by following these instructions for eye splicing a rope.
STEP 1
From the rope's bitter end, measure back one full fid length. Place a mark on the rope (A). Put a single wrap of tape at the bitter end. (Fig 1) A fid length equals 21 times the diameter of the rope or 7 times the circumference.
STEP 2
Form the desired eye size and mark the point opposite A. This will be the mark B. (Figure 1)
STEP 3
From mark B, measure down the rope one full fid plus half fid, this will be mark C. (Figure 1)
STEP 4
From point A, counting toward the bitter end, count out 6 pics. Mark this pair and continue down the rope, marking every fifth pair as shown.
STEP 5
Cut and remove these strands back to the bitter end.
STEP 6
Re-tape the bitter end and attach it to your splicing tool. Insert this tool at B and exit at C. Pull through until A and B line up. Remove the tool and tape wrap from exposed tail. (Figure 2)
STEP 7
Firmly grasp the rope at the point where A and B meet. Smooth the rope away from this point, up the standing part of the line. The tapered tail will withdraw into the rope.
STEP 8
We recommend lock stitching and whipping the splice.
12-Strand Single Braid Lock Stitch Eye Splice
STEP 1
Mark rope in 2-1/2 full fid lengths from the bitter end. Mark this A. Form the desired eye size and place a mark opposite A, mark this B. Measure 1 long fid section further. This is mark C. Continue down the rope an additional 2-1/2 fid lengths. Mark this D. (Figure 1)
STEP 2
To mark the tuck points in the area between points B and C mark the 3rd, 6th and 9th pics. Open up B with a fid tool and pass the bitter end and tail through the rope completely. Pull the tail through until A and B align. Make subsequent tucks in the same manner between the 3rd and 4th, 6th and 7th strands. (Figure 2)
STEP 3
Pull the tucks tight as you go. After the last tuck above attach your splicing tool to the tail and insert it between the 9th and 10th strand exiting the rope at mark D. Remove the tool and the tape wrap from the tail end.
STEP 4
Work from the bitter end toward mark A, count three consecutive strand pairs and mark, count another five consecutive strand pairs and mark the 5th pair. Continue counting and marking the 5th consecutive strand pair until a total of 5 strand pairs have been marked. Cut and remove these strands back to bitter end and re-tape the bitter end. After taper is complete, hold rope at the neck of the splice and smooth cover until taper disappears.
NOTE: The rope may be too tight to bury before tapering, if so perform step 4 before steps 2 & 3.
12-Strand End-for-End Splice Class 1
By following the procedure below, the splice can retain from 90% to 100% of average new rope strength and in used rope up to the same proportion of residual used rope strength.
STEP 1 Marking Measurements
Tape ends of line to be spliced. Lay two ropes to be spliced side-by-side and measure one tubular fid length, (two wire fid lengths because wire fids are half the size) from taped end of each line and make a mark - mark 1.
From mark 1 measure one tubular fid length (two wire fid lengths) and make mark 2 on both lines.
From mark 2 measure two tubular fid lengths (four wire fid lengths) and make mark 3 on both lines.
STEP 2 Tapering Tail
From mark 1, in the direction of the tapered end of the line, mark every second right and left strand* for three strands.
Cut every marked strand and pull out of line (tape at end can cause resistance and may have to be removed in order to pull out cut strands).
Tapered end will now have only 6 strands remaining. tape tapered tail tightly to keep from unbraiding during the rope splicing process.
*Larger rope diameters may have pairs of strands in right and left direction. In this case, treat the pairs of strands as a single strand, marking and cutting both in each direction as described above.
STEP 3 Repositioning Ropes
Reposition ropes for splicing according to diagram below.
STEP 4 Burying Rope A Into Rope B
Attach fid to tapered end of rope A and insert fid into rope B at mark 2 and bring out at mark 3. Then remove fid.
Pull tapered tail of rope A until you have buried up to its mark 2. With larger lines, once you have fid and tapered tail through the line, tie off tail to stationary object; then use both hands and weight of body to bury rope B up to mark 2.
Leave tail sticking out.
Step 5 Finish Burying
Attach tapered tail of rope B to fid. Insert fid into rope A approximately the diameter of the line away from insertion point of rope A into rope B. Bring fid and tail out at mark 3 of rope A. Following same procedures as in step 4 to bury rope B up to its mark 2. Leave tail sticking out.
Step 6 Smooth Out Splice
Pull tails to tighten crossover. Then, smooth braid in both directions away from the crossover. Now cut off tails - cut the tails on an angle so as to give them a point.
Give a final smoothing, away from crossover, stroking rope firmly. Tails should bury inside cover. Rope splicing is a bit of an art, form as well as function.
Lock Stitching Procedure
Step 1
From mark 2 at crossover, count 8 picks in either direction and insert stitching twine.
Step 2
Working towards the crossover, pass end "b" back and forth through splice until a minimum of 2 complete stitches have been made on each side of crossover.
Step 3
Tie an overhand knot in each tail, as close to its exit point as possible.
Insert tail of stitching twine at extract location where twine emerges. Using a needle or small fid, pull (or push) through rope at a slight angle. Pull hard on the end of the twine so that the knot disappears inside the rope. Trim off the remaining twine close to the rope.