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A winch is a mechanical device consisting of a spool and an attached hand crank and is used to wind up or wind out cables or wires. It is simply described as a device that adjusts the tension on a rope or cable by pulling in or letting out by turning the hand crank. Winch gear systems come in different types; one of these is the Worm gear trailer winch.
A worm gear trailer winch is designed to unload cargo to and from a trailer. It comprises of a cable and a ratchet mechanism. Even though it is heavier, bulky, difficult to mount, and more expensive than the planetary and spur gears, a worm gear trailer winch can either be manual or motorized and is known for its durability, endurance, and high reliability. A worm gear trailer winch is also designed to be“self-braking”, which means that a braking system is not needed anymore. Though mechanically less efficient, taking into consideration that it typically operates slower than the other types of winch gear systems, the worm gear trailer winch is popularly used on tow trucks and trailer trucks since there is no need to unload cargoes immediately and serves its purpose greatly when holding or lowering an object.
The worm gear trailer winch is a great necessity in salvaging off-road situations wherein the vehicle is likely to be stuck in mire and mud. In terms of efficiency rate, the worm gear trailer winch comes last, running at 35-40 percent, unlike the planetary and spur gear trailer winches that run at 65-70 percent.