Depending upon the load supported by hoists they can be divided into wire rope hoists or chain hoists. Let us discuss what these hoists are and what are the advantages and disadvantages of both.
CHAIN HOISTS
A metal chain is used as lifting medium in chain hoists. These hoists use a hook connected to a chain and are designed to lift the load vertically. Chain hoists can be operated manually, electrically, hydraulically or pneumatically. They are a popular choice as they are relatively low maintenance and cheaper than wire rope hoists. However, HOT Crane Manufacturers suggest the use of this hoist in applications where the weight is below five tonnes as they have a lower lifting capacity.
Following are the advantages of using chain hoists.
Good value for money
Even though the lifting capacity of the chain hoist is lower than the wire rope hoist, it turns out to be a much more economical option. However, it does allow you lift more weight than a manual hoist would.
Very flexible
Chain hoists can be easily transported between different sites thus making it a very flexible option. It is especially useful for construction industry as there is a need to move the hoist from one site to another.
Easy to achieve vertical lift
Since there is no room for lateral movement chain hoists can be used with a variety of lifting equipment like jib cranes and gantries.
Easy to limit switches
You can easily set the minimum and maximum path with the help of upper and lower limit switch. This protects the load from human error.
Disadvantages
Limited lifting capacity
One of the major disadvantages of a chain hoist is that it has a limited lifting capacity, usually under five tonnes. This makes it redundant for applications where heavy loads need to be move.
Can snap immediately
A wire rope hoist will disintegrate strand by strand, however, a chain hoist can snap immediately. This can be avoided with regular inspection and maintenance.
WIRE ROPES
A wire rope hoist is used as a lifting medium in applications and industries where heavy loads, up to 20 tonnes, need to be moved. They perform lifts at a faster speed than chain hoists. Crane manufacturers make these hoists which can be powered manually, electrically, or pneumatically.
Advantages of wore rope hoists
Made for heavy lifting
Wire rope hoists can lift heavy loads as compared to chain hoists. These hoists are made using multiple wires which allows it to distribute the weight. venus engineers are of India’s leading Overhead HOT crane manufacturers.
They are very safe
Since there are many wires used to make these hoists, it means that even if one of the wires breaks or snaps they will still be able to hold on to the load and lower it safely.
High resistance
Wire rope hoists are resistant to corrosion, rust and abrasion, thus less likely to get spoilt. You can even go for a galvanised hoist which will offer even greater protection.
Require huge space
Since they are made for lifting heavy loads they are also big units themselves. Thus, you plant or site should have enough space to install these hoists. HOT cranes suppliers will suggest wire rope hoists only if there is enough space available.
Very expensive
Wire rope hoists are a more expensive option than chain hoists.
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