Swivel

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A swivel in a chain link Swivel (PSF).png
A swivel in a chain link
Stainless steel anchor swivel Anchor swivel.jpg
Stainless steel anchor swivel
A swivel in a link Swivel (2).JPG
A swivel in a link

A swivel is a connection that allows the connected object, such as a gun, chair, swivel caster, or an anchor rode to rotate horizontally or vertically.

Contents

Swivel designs

A common design for a swivel is a cylindrical rod that can turn freely within a support structure. The rod is usually prevented from slipping out by a nut, washer or thickening of the rod. The device can be attached to the ends of the rod or the center. Another common design is a sphere that is able to rotate within a support structure. The device is attached to the sphere. A third design is a hollow cylindrical rod that has a rod that is slightly smaller than its inside diameter inside of it. They are prevented from coming apart by flanges. The device may be attached to either end.

A swivel joint for a pipe is often a threaded connection in between which at least one of the pipes is curved, often at an angle of 45 or 90 degrees. The connection is tightened enough to be water- or air-tight and then tightened further so that it is in the correct position.

Anchor rode swivel [1] [2] [3]

Swivels are also used in the nautical sector as an element of the anchor rode and in a boat mooring systems. With yachts, the swivel is most commonly used between the anchor and chain. There is a school of thought that anchor swivels should not be connected to the anchor itself, but should be somewhere in the chain rode. [4]

The anchor swivel is expected to fulfill two purposes:

Concerns

The biggest concern about anchor swivels is that they might introduce a weak link to the rode.

See also

Related Research Articles

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<span class="mw-page-title-main">Bolt snap</span> Sprung slide gated snap hook

A bolt snap is a type of snap hook with a manually operated bolt action slide gate of medium security used to clip a light load to a ring, eye, loop or bight to temporarily secure or suspend an object. They are used for a wide variety of applications including dog leads and for clipping scuba equipment to the diving harness. A similar but more secure device used to attach sails to a stay is known as a piston hank. It differs from a snap shackle in that the load is not carried by the gate. The bolt snap must be actively operated by the user to clip or unclip, and is not easily snagged or unintentionally clipped or unclipped by pressing or bumping against the surroundings.

References

  1. "To Swivel or to Twist, That is The Question". features.coastalboating.net. Retrieved 2020-12-26.
  2. Nicholson, Darrell (2015-08-14). "Anchor Swivels: Caution Required". Practical Sailor. Retrieved 2020-12-26.
  3. Sechez, Rudy and Jill. "Keep Your Boat Safe by Using Anchor Swivels Correctly". Sail Magazine. Retrieved 2020-12-26.
  4. 1 2 "Swivels (Rocna Knowledge Base)". kb.rocna.com. Retrieved 2020-12-26.
  5. "Metals Used in Anchoring Tackle". cruising.coastalboating.net. Retrieved 2020-12-26.

Bibliography