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A winch is a mechanical device that is used to pull in (wind up) or let out (wind out) or otherwise adjust the tension of a rope or wire rope (also called "cable" or "wire cable"). In its simplest form, it consists of a spool (or drum) attached to a hand crank .
In offshore applications, huge lengths of rope are often housed on drums. The anchor winches on Saipem's Semac 1 pipe laying barge, for example, each hold 2,800 metres of 76mm (3 inch) diameter wire rope in 14 layers. Saipem's Castorone, the world's largest pipe laying vessel uses a wire rope that is 3,850m long and 152mm in diameter. It weighs ...
A come-along. A come-along, also known as a power puller, is a hand-operated winch with a ratchet used to pull objects. The drum is wrapped with wire rope.A similar tool that uses a nylon strap is used to straighten trees, as it straightens gradually over time, therefore not splitting the trunk.
In workover operations, a well-servicing unit is used to winch items in and out of the wellbore. The line used to raise and lower equipment can be braided steel wireline or a single steel slickline. Workover operations conducted can include well clean-up, setting plugs, production logging and perforation through explosives.
Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.
Traditionally, fibre optic cables were pulled through cable ducts in the same way as other cables, via a winch line. Every time the fibre passes a bend or undulation in the duct, the pulling force is multiplied by a friction-dependent factor (which can be reduced by using lubricant [2]). This means that the higher the local pulling force is ...
President Donald Trump campaigned on the promise of tariffs. He followed through on that pledge within days of re-taking office, making many Americans concerned about their already-strained ...
Hand crank for a winch on a sailboat - commonly referred to as a winch handle. A crank is an arm attached at a right angle to a rotating shaft by which circular motion is imparted to or received from the shaft. When combined with a connecting rod, it can be used to convert circular motion into reciprocating motion, or vice versa. The arm may be ...