Pintle and gudgeon rudder system scheme.svg
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A pintle is a pin or bolt, usually inserted into a
gudgeon A gudgeon is a socket-like, cylindrical (i.e., ''female'') fitting attached to one component to enable a pivoting or hinging connection to a second component. The second component carries a pintle fitting, the male counterpart to the gudgeon, ...
, which is used as part of a pivot or hinge. Other applications include pintle and lunette ring for towing, and pintle pins securing casters in furniture.


Use

Pintle/gudgeon sets have many applications, for example: in sailing to hold the rudder onto the boat; in transportation a pincer-type device clamps through a
lunette ring A tow hitch (or tow bar or trailer hitch in North America) is a device attached to the chassis of a vehicle for towing, or a towbar to an aircraft nose gear. It can take the form of a tow ball to allow swiveling and articulation of a trailer, ...
on the tongue of a trailer; in controllable solid rocket motors a plug moves into and out of the motor throat to control thrust. In electrical cubicle manufacture, a pintle hinge is a hinge with fixed and moving parts. The hinge has a pin "pintle" and can be both external and internal. The most common type consists of three parts. One part on the body of the cubicle, one part on the door and the third part is the pintle. In transportation, a ''pintle hitch'' is a type of
tow hitch A tow hitch (or tow bar or trailer hitch in North America) is a device attached to the chassis of a vehicle for towing, or a towbar to an aircraft nose gear. It can take the form of a tow ball to allow swiveling and articulation of a trailer, ...
that uses a tow ring configuration to secure to a hook or a ball combination for the purpose of towing an unpowered vehicle. As a weapon mount, a pintle mount is used with machine guns as the mounting hardware that mates the machine gun to a vehicle or tripod. Essentially, the pintle is a bracket with a cylindrical bottom and a cradle for the gun on top; the cylindrical bottom fits into a hole in the tripod while the cradle holds the gun. In
furniture Furniture refers to movable objects intended to support various human activities such as seating (e.g., stools, chairs, and sofas), eating (tables), storing items, eating and/or working with an item, and sleeping (e.g., beds and hammocks). Fu ...
, a pintle is usually fitted to a caster; the pintle is then inserted into a base, fixing the caster to that base. In rocketry, a
pintle injector The pintle injector is a type of propellant injector for a bipropellant rocket engine. Like any other injector, its purpose is to ensure appropriate flow rate and intermixing of the propellants as they are forcibly injected under high pressure into ...
uses a single-feed fuel injector rather than the hundreds of smaller holes used in a typical rocket engine. This simplifies the engine, reducing cost and improving reliability, while surrendering some performance. TRW Notable modern uses are Pintle is also a common term used in the design of aircraft landing gears. It describes the attachment point between the landing gear structure and the aircraft structure. The pintle is the bolt around which the landing gear rotates when it is extended/retracted into/out of the aircraft. The pintle is a highly stressed component during landing manoeuvres and is often made from exotic metal alloys. For World War II aircraft with sideways-retracting main gear units, carefully set-up "pintle angles" for such axes of rotation during retraction and extension allowed the maingear struts to be raked forward while fully extended for touchdown and better ground handling, while permitting retraction into rearwards-angled landing gear wells in their wings to usually clear the forward wing spar for stowing while in flight.Snyder, Chuck (August 2012)
"How to Install Retractable Landing Gear"
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Model Aviation ''Model Aviation'' is the monthly full-color publication written, prepared and distributed by the Academy of Model Aeronautics beginning in 1936 and established as an independent publication in July 1975. The magazine is based in Muncie, Indiana. ...
'', p. 37.


Gallery

File:Stone door.jpg, Massive pintles on a stone door; early doors often pivoted on pintles File:Pintle and gudgeon.png, Image depicting a gudgeon with a pintle File:Pintle Hinge 2.jpg, Pintle hinge parts File:Pintle Hinge 1.jpg, Pintle Hinge installed on a switchboard File:Swivel caster.jpg, Swivel caster with pintle File:NATO hitch.JPG, Pintle hook File:NATO tow bar rotated 180 degrees.jpg,
Lunette ring A tow hitch (or tow bar or trailer hitch in North America) is a device attached to the chassis of a vehicle for towing, or a towbar to an aircraft nose gear. It can take the form of a tow ball to allow swiveling and articulation of a trailer, ...
, used with a pintle in heavy towing applications


See also

*
Hinge A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation: all other ...
*
Pintle and gudgeon A gudgeon is a socket-like, cylindrical (i.e., ''female'') fitting attached to one component to enable a pivoting or hinging connection to a second component. The second component carries a pintle fitting, the male counterpart to the gudgeon, ...
* Pintle hook and lunette ring *
Spindle (automobile) In an automobile, the wheel spindle, sometimes simply called the spindle, is a part of the suspension system that carries the hub for the wheel and attaches to the upper and lower control arms. Spindles are carried by steering knuckles or "upr ...


References

{{Reflist Bearings (mechanical) Fasteners Hardware (mechanical)