Friction

What is a friction in rope bondage?

A friction in rope play is a spot where the rope crosses over itself and stays put, with no knot in it. The grip comes purely from friction between the strands. A friction holds as long as there is tension on it and lets go the moment you take that tension away.

How does a friction work?

Friction between two pieces of rope does the work a knot does elsewhere.

The material decides how much that gives you. The encyclopedia on Japanese bondage puts it this way: the natural fibers grip into each other easily, so the tie can be held together by the friction of turns and bends or by very simple knots. Hemp and jute chafe, and that chafing is exactly the point. On smooth nylon the same turn slides right off.

In knot theory the principle is older than the scene. A friction hitch from the climbing world slides freely as long as no load hangs on it and bites down the moment you pull. Different technique, same physics.

The word itself is older than both. According to the Etymologisch Woordenboek van het Nederlands, the Dutch frictie has meant ‘rubbing’ since 1847, borrowed from New Latin frictio.

Why rope workers reach for a friction over a knot

Because a friction is gone again in one movement.

For the person tying, that is speed. You lay the wrap, pull the rope underneath, pull tight, and the turn holds. No knot to pick out, no loose end to lose. For the person tied it is something else. A knot pulled shut under load will not come open with wet fingers, but give a friction half a second of slack and it is gone. That matters in a panic, in a cramp, with a leg that has fallen asleep.

And it spreads pressure. Khodulev and colleagues catalogued sixteen nerve injuries in ten people after rope bondage in Cureus; in 81 percent of cases it was the radial nerve, and their recommendation is to use techniques that distribute pressure evenly. Several strands side by side with a friction on top do that better than one strand with a thick knot.

A friction is a technique, not a safety measure. On the wrong spot it holds just as hard as on the right one.

What to watch for

Feel where the friction lands. On the soft side of the upper arm that is fine, on top of the deltoid tuberosity or right on a wrist it is not, because there it flattens a nerve instead of a strand of rope. And do not lay it where the tied person is going to lie on it.

Where this fits on this site

If you want to feel what rope does without taking a course for it yourself, that belongs with a BDSM date. That page has what gets agreed beforehand and how far the rope goes that evening.

Sources

• Acute Radial Compressive Neuropathy: The Most Common Injury Induced by Japanese Rope Bondage. Khodulev, Klimko, Charnenka, Zharko & Khoduleva, Cureus 15(5): e39588, 2023. Provides the sixteen nerve injuries in ten people, the 81.3 percent share for the radial nerve, and the recommendation to use techniques that distribute pressure evenly and avoid excessive compression on nerve pathways.
• frictie. Philippa, Debrabandere, Quak, Schoonheim & Van der Sijs, Etymologisch Woordenboek van het Nederlands (2003-2009), via the Etymologiebank of the Instituut voor de Nederlandse Taal. Provides the 1847 dating for ‘rubbing, the act of rubbing’, the figurative meaning ‘discord, dispute’ from 1963, and the origin from New Latin frictio via French.
• Japanese bondage. Wikipedia. Provides the observation that natural fibers grip into each other easily and that the tie can therefore be held together by the friction of turns and bends or by very simple knots. The article is used for that one point; several neighboring paragraphs carry a citation-needed request themselves.
• List of friction hitch knots. Wikipedia. Provides the definition of the friction hitch as a knot that slides freely as long as it is unloaded and clamps down as soon as a load comes on. Used only for that general knot theory, not for rope play; since June 2014 the article carries the notice that it needs more sources.

Related terms

• Bondage. The umbrella term in which friction is one of the basic techniques.
• Bight. The loop you start with; the first friction usually follows right after it.
• Double column tie. The cuff where you see a friction at work most clearly.
• Single column tie. The cuff that shows why rope work leans on friction and not on one clever knot.
• Asanawa. The natural-fiber rope that chafes enough to make a friction grip.
• Cinch. The cross turn that often ends on a friction.
• Bonding. The verb for what you are doing with all those turns.
• Rope. The tool the friction forms in, and how a strand is built up.