Industrial hoists lift heavy objects using a motor and line, with electric, pneumatic, and hydraulic types available. They can be mounted on various equipment and used in many contexts, from manufacturing to emergency operations. Some hoists use manual labor or lifting slings.
Hoists are machines designed to lift heavy objects on a line. They typically accomplish this by using a stationary motor to wind a line that is attached to an object. Industrial hoists are divided into three categories: electric, pneumatic and hydraulic; they can also be characterized by the type of thread they use, such as chain or rope. Industrial hoists operate in a wide range of applications and sizes. These can be anything from lifting small paving stones to heavy shipping containers.
Originally, hoists were operated by hand or steam and used block and tackle systems. Contemporary industrial hoists usually employ electric rope, wire rope or electric chain. Relying on motors for rotational force, hoists overcome weight, or linear gravitational force, to pick up objects. The pulling motion pulls the object up and down as the line wraps around a rotating cylinder. This movement is assisted by small or large cranes to transport the object elsewhere, or by mounting units on cross beams and allowing them to move sideways.
Industrial hoists are used in many different contexts. Electric types are the most popular, while pneumatic and hydraulic hoists are often designed to serve more specific applications. Loads with capacities from tens to thousands of pounds or kilograms can be moved by electric chain hoists, which often feature variable operating speeds. Typically operated by a remote switch, some are designed for quiet operation. This can help in environments such as theaters to raise and lower the stage.
Usually, industrial hoists are contrasted with hoists, which could be vehicle-mounted equipment that performs a similar function. Industrial hoists can be mounted to everything from mounts for lifting car engines, or even the cars themselves, to small excavators used in landscaping, booms, cranes and aerial lifts. These can be used in manufacturing and industry as well as emergency operations. Some may be mounted on wishbones, while others hang from colossal straddle hoists that girdle the ships. Other industrial hoists are attached to Goliath cranes, harbor or gantry cranes, to assist in the lifting of large-scale loads.
A number of industrial lift technologies assist in material handling for jobs ranging from manual labor to personal or industrial transportation and large-scale construction projects. Despite modern advances, some continue to rely on simply turning a wheel by hand to provide lift, as with plasterboard ceiling lifts. Other varieties employ lifting slings, which are reinforced bands that help lift objects without damaging them, such as small airplanes, boats, and people in rescue operations.
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