Make a splice

Splicing is an art that transforms a simple rope into a professional tool, stronger and more aesthetic than a knot. Unlike a knot, which can reduce a rope's strength by 30 to 50%, a well-made splice retains about 90 to 95% of its breaking strength.

Here is a tutorial for making a splice on a hollow braid rope (Dyneema type), a technique highly favored in modern sailing for its simplicity and robustness.

1. Essential Equipment

Before you begin, prepare your workspace:

• The rope: A hollow braid (Dyneema or braided polypropylene).

• A splicing needle: Or a "fido," suited to the diameter of your line.

• A marker: To identify the insertion points.

• A tape measure: Precision is key to strength.

• A pair of sharp scissors or a marlinspike knife.

• Electrical tape (chaterton): To taper the end of the rope.

2. Step 1: Marking

For the splice to hold by friction (the "Chinese finger trap" principle), the length of the inserted part must be sufficient.

1. Mark A: Determine the size of your loop (eye) and make a mark.

2. Mark B: From Mark A, measure a length corresponding to approximately 50 to 60 times the diameter of the rope (e.g., 30 cm for a 6 mm rope). This is the part that will be inserted inside the standing part.

3. Step 2: Insertion (The Pass)

1. Tape the end of the rope (the working end) to make it stiff and pointed.

2. Attach it to your splicing needle.

3. Insert the needle into the rope at Mark A.

4. Advance the needle inside the braid until it exits at Mark B.

5. Pull the needle to pass the working end inside. You now have a loop, but it is not yet secured.

4. Step 3: Locking (Optional but Recommended)

To prevent the splice from slipping when not under tension, a "Brummel" is often created.

1. Instead of simply inserting the line, you pass the standing part through the working end, then the working end through the standing part.

2. This creates a mechanical lock that secures the eye even when slack.

5. Step 4: Tapering (The Gradual Reduction)

This is the most important step to avoid a sharp "breaking point" at the splice's exit.

1. Pull the end of the working end out of the braid at Mark B.

2. Unlay the strands for the last 5 to 10 cm.

3. Cut the strands diagonally (in steps) so that the diameter gradually decreases towards the tip.

6. Step 5: Smoothing (The Finish)

1. Hold the loop with one hand and the standing part with the other.

2. Smooth the outer braid firmly from the loop towards the standing part.

3. The inserted part (the working end) will disappear inside the standing part. Thanks to the tapering, the transition will be smooth and aesthetic.

7. Pro Tips

• Patience: If the braid is very tight, massage the rope to loosen the fibers before inserting the needle.

• Security: For ropes subjected to very high loads (halyards, running backstays), secure the splice with a small whipping at the junction point.

• Emergency tool: If you don't have a needle, a piece of wire bent in half can act as a fid.

Summary of Safety Lengths