Hoists play a critical role in the manufacturing environment. It is a portable, manually operated device with a handle (lever) connected to the main casing that houses the mechanism of gears and latches that hold and support a weight-bearing chain, pulling it through in either direction or locking it in place.
A lever chain hoist typically has two strong steel hooks: one on the housing to secure the hoist to a bar or beam and another on the chain to attach to the hoisted object. Significantly, a strong handle is typically located at the non-hook end of the chain to aid in chain positioning and to prevent the chain from slipping completely through the hoist housing.
Considering the hoist’s importance in lifting and moving heavy products, selecting and installing a suitable hoist is vital. In this article, we’ll go over crucial lever chain hoist fundamentals and some of the features and options to consider when assembling the right lever hoist system for your needs.
1. Type of Hoists
You must first decide what type of hoists you require for your application. Manual chain hoists (chain pulley blocks), lever hoists, and electric chain hoists are the three main hoist (ECH) types.
Manual chain hoists use manual lifting for their workloads and are ideal for infrequent lifting because operators must pull the hand chain each time. They are used for lower lifting capacities and are easily transported within any facility. Another advantage is that they are less expensive to buy and install than powered-type hoists.
A lever hoist is more adaptable and ideal for pulling or fixing loads in various positions. Typically, it has a freewheel function that allows the load chain to be freely adjusted to the desired positions.
Electric chain hoists use electricity and have a greater lifting capacity than other types. You can also use them more frequently because the push-button pendant allows for simple operation. It is an excellent choice for your manufacturing or production facility.
2. Picking Your Lifting Speed
Hoist lifting speeds vary greatly and should be carefully considered before making a choice. In general, faster lifting speeds are preferred for long or short lift applications that require a large number of lifting/lowering cycles to be completed in a short period.
The torque requirement is determined by the weight of the load to be lifted and the required lifting speed and hoist gear ratio, which in turn dictates the motor horsepower required to provide that torque. Additionally, higher horsepower motors can increase a hoist’s size, weight, power consumption, and cost.
3. Examine the Suspension Type You Will Use
The type of hoist suspension is the next factor to consider. Most manufacturers provide the three hoist suspension options listed below.
Hook Mounted
The hoist body includes a hook that can be attached to a crane to suspend the hoist. Additionally, you can choose between a rigid and a swivel hook system. Significantly, the rigid hook system is better suited for applications where the load must be kept stable. On the contrary, the swivel hook system is better suited for applications requiring rotational movement.
Trolley Mounted
Some hoists include a trolley. However, using appropriate pins or studs, you can connect a hook, clevis, or lug-mounted hoist to a trolley. Trolleys allow for movement on the top of the bridge beams of an overhead crane, the low flange of a monorail beam, and the low-flange bridge beam of an overhead crane.
Lug Mounted
A lug mounting is sometimes included with the hoist frame. Significantly, a lug-mounted hoist can be attached to a trolley or any other support structure. Also, be sure to use appropriate pins or studs to securely fasten the lug to the hoist.
The three main types of trolley suspensions are plain trolleys, hand-chain-operated trolleys, and electrically or pneumatically powered trolleys. You can choose a trolley suspension based on your budget and requirements.
4. Capacity
The rated capacity is another important consideration when choosing a hoist. The rated capacity of a hoist must be greater than the heaviest load expected to be lifted. Furthermore, the structure from which the hoist will be suspended, whether beam or crane, must be strong enough to support that load.
Consider the state of loading when determining the capacity of electric hoists. The Hoist Classification criterion determines hoist life based on the loading state. If the capacity exceeds the actual load, the hoist’s life will be extended, but the initial purchase price will be higher. Significantly, the best capacity choice for your application is determined by the balance of each factor.
5. Find Out What Power Source Is Available
Choosing the proper power supply is also critical, especially when working with electrical hoists. Additionally, electric hoists can be powered by a single- or three-phase power supply. Single-phase hoists can lift lighter loads, while three-phase hoists can lift heavier loads. However, because most manufacturing and construction projects are heavy, three-phase electric hoists are required. However, consult experts to determine how much power is required for safe hoisting.
Bottom line
We hope the information in this article sheds some light on some factors to consider before purchasing or specifying a hoist. Choosing the right hoist for the job can be the first step toward safe, efficient, and ergonomic material movement.
