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Knot List: Uni (Duncan) Knot ‐ Step-by-Step

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Uni (Duncan) Knot, Animated Knots
Uni (Duncan) Knot, Step-by-Step Animation
 

Uni (Duncan) Knot Tying

Pass the end through the eye. Form a complete loop alongside the standing line. Working inside the loop, wrap the end around both lines five times. Lubricate, tighten so the loop spirals, and slide the knot to the desired loop size. With the loop on a post pull on the tag end and less hard on the standing line. Trim the end.
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Uni (Duncan) Knot Details

Names: The Uni Knot was populairzed by the outdoor writer Vic Dunaway as being a versatile knot that can have many applications. However, in its loop form, it was originally described by Norman Duncan and is, accordingly, well known as the Duncan Knot. It is also known as a Grinner Knot and has the same appearance as a Hangman's Noose although it is different internally. When used to join two lines it is known as a Double Grinner or a Double Uni Knot

Transformation: The Uni (Duncan) knot undergoes a transformation as it is tightened. The outer wraps become internal and vice versa.

Versatile: As described by Vic Dunaway it is the key component of his Uni Knot System – which can provide all of the applications needed for fishing with a single knot. To join two lines a Uni-knot is tied around the other line. For Snelling, the knot is tied around the shank of the hook.

Tying it: The animation shows that the Uni (Duncan) Knot initially forms an adjustable loop. When finally tightened, the knot binds and becomes fixed in proportion to the degree of tightening. When used for joining two lines (as in the Uni Knot system), each knot is tied around the other's standing end.

Pros and Cons: The Uni (Duncan) Knot works well with both braided and monofilament fishing lines, and with practice is fairly easy to tie in the dark. Claims that it retains a high proportion of line strength have been justified by recent testing arranged by Mack Martin that showed 82% of line strength. When tied a round a large diameter eye, it may retain strength well, but if used to join two lines, like other knots where a line passes around itself, a breaking strain around 75% is more likely.

Disclaimer: Any activity that involves ropes is potentially hazardous. Lives may be at risk - possibly your own. Considerable attention and effort have been made to ensure that these descriptions are accurate. However, many critical factors cannot be controlled, including: the choice of materials; the age, size, and condition of ropes; and the accuracy with which these descriptions have been followed. No responsibility is accepted for incidents arising from the use of this material.

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