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A turnbuckle, stretching screw or bottlescrew is a device for adjusting the tension or length of ropes, cables, tie rods, and other tensioning systems. It normally consists of two threaded eye bolts , one screwed into each end of a small metal frame, one with a conventional right-hand thread and the other with a left-hand thread.
Coupling nuts can be used to tighten a rod assembly inward or to press a rod assembly outward. [ 4 ] [ 5 ] Along with bolts or studs, coupling nuts are also often used to make homemade bearing and seal pullers/presses.
In the center of the screw is the handle housing with a hinged ball handle attached. This turnbuckle style arrangement allows the vehicles to be pulled together by tightening the screw with the attached handle. Typically, the screw is tightened until there are two threads left next to the handle housing.
In recent decades, as steel wire became the prevalent material for sailboat rigging, deadeyes and lanyards gave way to metal turnbuckles for tensioning the wires. More recently, however, with the advent of high-strength and low-stretch synthetic fibres, some sailboats are using synthetic rope for standing rigging, and deadeyes and lanyards are ...
The spindle on brushcutter and line trimmer heads, so that the torque tends to tighten rather than loosen the connection; The hand-tightened nut holding the fan blade to the motor spindle in many designs of oscillating table fans and floor standing fans; In combination with right-hand threads in turnbuckles and clamping studs [3]
For example, if a standard automotive bolt in the U.S. is being secured, then the safety wire when installed should put tension on the bolt in a clockwise direction, since that is the direction that the bolt turns to tighten. [7] When drilling a fastener, the choice of where to drill it depends on the type of fastener and to what it will be wired.
In some devices that have threads on either end, like turnbuckles and removable pipe segments. These parts have one right-handed and one left-handed thread, so that turning the piece tightens or loosens both threads at the same time. In some gas supply connections to prevent dangerous misconnections.
A knuckle joint on a locomotive, seen behind the pin joint of the eccentric crank. Ball-point pen included for size. A mechanical joint is a section of a machine which is used to connect one or more mechanical parts to another.