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Hitch — object-dependent

Buntline Hitch

Friction on hardware · Physical hitch theory

Does not pick a knot

This page does not pick a knot for you. DNA, molecules, quantum braids and vortices stay off Decide.

Buntline Hitch, finishedBuntline Hitch, finished

Finished structure

Drawn from a rope model of this knot: which strand passes over which comes from where the rope actually lies.

Failure modes

When this family fails, it fails as these. The recovered end still outranks the name.

Jam-to-hardware family

A hitch that cinches to the ring or shackle and is not meant to break by hand.

  • !Second turn tied outside — two half hitches, not a jam
  • !Expected to untie after a snatch
  • !HMPE without a splice — the hitch strips the cover
Fails when
  • !The half hitch sits on the far side of the first turn, so the end points away from the ring and it is only two half hitches.
  • !It has taken a heavy load or shock and now has to come undone; it can jam too tight to untie without a marlinspike.
  • !It was loaded with a gap to the ring or crossed turns, and shock loads jam it in that shape, which is harder to check and to free.
Geometry
  • Second turn tied outside

    This is two half hitches, not a buntline, and can walk

    The second clove turn must sit toward the ring · step 02

  • Floating clove never dressed to the ring

    Walks, then jams in the wrong place

    Dress the clove up to the ring before load · step 03

  • Expected to untie after a snatch

    Knife job on a painter you needed to cast off

    The jam is the hitch — pick round turn and two half hitches for a release · step 04

If you saw this
  • Cannot undo after load, or walks if the clove is reversed

    Check

    • ?Second clove turn toward the ring
    • ?Clove dressed to the ring

    Then

    • →Leave it if it is a standing job
    • →Cut and switch hitch if you needed a release
  • Second turn tied outside

    Check

    • ?This is two half hitches, not a buntline, and can walk
    • ?Inspect step 02

    Then

    • →Retie. Do not dress a defective structure and call it seated.
  • Floating clove never dressed to the ring

    Check

    • ?Walks, then jams in the wrong place
    • ?Inspect step 03

    Then

    • →Retie. Do not dress a defective structure and call it seated.
  • Expected to untie after a snatch

    Check

    • ?Knife job on a painter you needed to cast off
    • ?Inspect step 04

    Then

    • →Retie. Do not dress a defective structure and call it seated.
Same family

Same failure class, different geometry. Open the plates — Diagnose still starts from the symptom.

This failed — start Diagnose

What holds it

  • ·A hitch is object-dependent. Remove the spar, cleat, ring or pile and the structure is usually the unknot.
  • ·Bayman / Maddocks–Keller describe a no-slip regime from wrap count and friction. The prediction is approximate, and only for hitches.

What topology does not predict

  • ·Closed-loop knot invariants (Jones, Alexander) do not say whether a clove hitch will walk on a smooth spar.
  • ·No manufacturer working load is implied by wrap count.
  • ·Wet, iced, or HMPE covers change friction — topology is silent.

Not for

  • ·Joining two free rope ends — that is a bend
  • ·A standing loop that must survive after the object is gone
  • ·A job you must undo by hand after load (it jams)
  • ·HMPE without a splice

Same pattern, different job

No sourced twin among these knots. Related knots stay on the Library card.

Sources