Electric wire rope hoists lift heavy objects with specific load capacities ranging from 0.5 to 45 tons. They consist of an enclosed electric motor that spins a grooved drum with a wire rope attached. The hoist can be stationary or travel on a rail, and has a push button remote control to raise or lower the hook and tackle. Braking systems prevent the hoist from moving on the track before activation. Mobile hoists can move objects from one location to another.
Lifting large objects or pieces of equipment is the purpose of an electric wire rope hoist. The device is typically mounted overhead and may be stationary or travel back and forth on a rail. Companies generally design and manufacture different types of hoists with specific load capacities ranging from 0.5 to 45 tons (0.45 to 41 metric tons).
These industrial hoists usually consist of an enclosed electric motor that spins a grooved drum. Wrapped around the drum is a wire rope which is made up of numerous metal wires wound together. One end of the wire rope or ropes is attached to the drum using iron clamps. The other end or ends descend through an enclosed rigging device. Suspended from the fixture is a large hook and snap fastener. The number of ropes passing through the block and tackle varies depending on the weight limit of the device.
The tackle usually has the ability to swing back and forth in a 180 degree line from its center. The hook under the tackle generally has the ability to rotate 360 degrees. A cable extends from the motor housing of the electric wire rope hoist. The cable has a push button remote control on the end, which allows the user to lower or raise the hook and tackle. A professional mechanical hoist usually contains some type of braking device that prevents the wire rope from slipping or advancing once the controller stops the motor.
A fully contained electric wire rope hoist can be mounted in a stationary position on an overhead girder. Some models have grooved wheels, which allow for mounting on a monorail or overhead track that allows workers to operate the hoist in more than one location. The ability to move the lifter also allows users to move objects from one location to another. With rail mounting, the electric wire rope hoist can be moved back and forth on the rail manually or by a motorized mechanism.
Mobile hoists generally have some type of braking system to keep the hoist from moving on the track before workers activate the system. Using an electric hoist simply requires the push of a button, lowering the equipment and hook to the required height. Once centered on the object to be lifted, the operators hook the object to the hoist by chains or by hooking the hook directly to the object. Pressing another button on the remote causes the motor to spin the drum in the opposite direction, rewinding the rope cord and lifting the object.
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