Electric hoist buyer's guide
When you buy electric hoist in Google, you can find electric hoists with various types, various brands, various specifications at a surprisingly wide (or very sparse) selections, and wondering which electric hoist is the best suitable. Well, then, there’s a guide for electric hoist buyers below:
electric chain hoist and wire rope electric hoist are two main types of electric hoist.
Electric hoists are available in 0.25 ton all the way up to 100 ton capacities. Electric hoists utilize an electric motor to turn the hoists internal gearing which in turn raises or lowers the load connected to the load chain. The clockwise or counterclockwise rotation of the drum is controlled by the operator's use of a pendant control featuring up and down buttons as well as an optional emergency safety stop. Electric hoists are fairly economical, but are limited in their use by what is known as its duty cycle. Every electric motor requires a certain amount of rest after a period of use.
It should be fairly obvious that one of the first things to contemplate when selecting an air hoist is the amount of weight you will be lifting. Hoists range in capacity from 0.25 ton to 100 ton. When choosing the right hoist for the job, always be sure to select a hoist that offers a little more capacity than that actually required by the job. When working with heavy objects you should always error on the side of safety. Also, you should ask yourself if the hoist might ever be used for another application other than the one currently in question. If this is the case, you might want to try and anticipate the weights of other objects to be lifted and plan accordingly.
The distance an object needs to be lifted vertically is the amount of lift required of the hoist. People sometimes refer to lift as the amount of "chain" required. The standard configuration for almost all hoists is 10 feet of lift. However, hoists are highly customizable and can be equipped with up to 99 feet of chain or more as required by the application. It is very standard for hoist manufacturers to modify the amount of lift of a hoist. Nevertheless, the greater the amount of chain requested the more expensive the hoist will be. Lift should be measured from the pick-up point of the object, to the bottom of the load hook when the hoist is in its fully retracted position. When calculating the amount of lift required, remember to take into consideration the actual height of the object being lifted. For example, if the distance from the lower hook of the hoist (in its retracted position) to the floor is ten feet, but the object and its pick up point sit two feet off the ground, only 8 feet of lift or "chain" is required. As with capacity, it is often better to have more lift than not enough. Again, try and anticipate whether someday this hoist could be used in an application requiring more lift and plan accordingly.
This simply refers to the amount of hand chain, electric cable, or air hose length offered as part of the control package. If for instance you are buying a hoist for a lowering application and plan on operating the hoist from a platform (think of unloading items off the deck of a ship unto a dock) adjacent to the hoist, you would most likely require a less than standard amount of drop. If however, you wanted to operate that same hoist from the area where the load pick up is to be made, you would need a considerably greater amount of drop.
Controls - Whether it’s a manual, pneumatic, or electric hoist; the length and type of controls must be carefully selected prior to ordering a hoist. As mentioned previously, a manual chain hoist (chain fall) is controlled by pull chain. Electric and pneumatic hoists feature pendant controls that dictate the lifting direction of the hoist. Electric models feature push button controls while pneumatic pendants utilize levers and valves to control the load. Older model and lower end pneumatic hoists sometimes feature two ropes connected to the ends of a small cylindrical stick which is tilted to the right or left to control the lowering or raising of a load.
The lifting and lowering speeds at which a hoist operates are measured in feet per minute (FPM). Typically, there is an inverse relationship between the lifting speed and the capacity of the hoist. That is, higher capacity hoists operate at slower speeds and lower capacity hoists operate at higher speeds. Sometimes however, the same model hoist will be offered in the same capacity, but with several different options for the speed. Furthermore, some hoists are offered in dual speed models which provide greater flexibility in their use.
Hook, Lug, or Trolley Mounted – Hoists can be mounted in three basic fashions. Hook mounted hoists utilize a snap style upper hook to connect to a beam clamp, trolley, or pre-drilled hole in an I-beam. Hook mounting results in a less than rigid connection allowing the body of the hoist to sway with the load. In contrast, a lug mounted connection results in more rigidity because the upper suspension of the hoist is connected to a bracket or trolley using a solid metal rod known as a lug. This cylindrical rod, acts as a stabilizer bolt of sorts, preventing the hoist from swaying with the weight of the load. Lug mounted hoists can be stationary or mobile when mounted to a manual or motorized trolley. Trolleys allow the operator to roll the hoist laterally through the plant along the length of the I-beam.
As I can see, Dongqi is your best choice. As a professional hoisting equipment manufacturer, Dongqi has offered various type of hoists to different industries. The electric hoists series offered by Dongqi include the chain electric hoists, Double speed electric hoists, wire rope electric hoists, European type electric hoists, explosion proof electric hoists, metallurgical electric hoist, and mini electric hoists, etc. Customized electric hoists are available, which are the optimal solution to your material handling problems.
Throughout this article we have discussed the various components involved in proper hoist selection. Of all the factors, none is more important than selecting the right capacity hoist for the job and ensuring that you never exceed the manufacturers rated load specifications. Hope this guide can help electric hoist buyers.
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