Showing posts with label hoists. Show all posts
Showing posts with label hoists. Show all posts

Thursday, 31 January 2013

Selecting the Best Wire Rope Hoists for Your Industry


Wire rope hoists are heavy duty electrically powered devices. They are made especially for lifting heavy objects that usually weight more than a ton. You can find them on large scale project sites including construction sites or industrial sites. However, these two are not the only places you will find them. You can find them anywhere where there is need for lifting heavy objects from one place to another.

The name wire rope hoists itself suggests that these hoists make use of a wire rope for the purpose of lifting. This wire rope is made out of numerous metal fibers, generally stainless steel and this makes it very durable. On the other hand chain hoists are made using metal chains. Electric wire rope hoists can lift weights by winding the rope around a drum that works by an electric motor. To supply them the necessary power to lift lots of weight, these devices are loaded with horsepower. This is the reason they can be useful in different types of situations. In certain conditions, it would be more useful to make use of a chain hoist.

The reason why wire rope hoists are unanimous choice is their durability. They are used in a variety of situations wherever there is a need for lifting large weights. The price of these equipment varies according to the type and its application. Monorail wire rope hoists have lifting capacities from 3 to 15 ton while top running wire rope hoists can lift weight from 5 to 40 tons.

You should purchase the wire rope hoist that meets your requirements. You should also ensure that the equipment meets safety standards. You should ensure that the machine is always within the safety limits. This will ensure that your equipment does not break down and continues performing trouble free operations.

Wednesday, 2 January 2013

Chain Hoist – Weighing Up your Requirements Easily


Defining Chain Hoist in simple terms means a heavy mechanical device that is used for lifting and shifting heavy objects such as machines, raw equipments and many such other things. This device is surrounded by small and big pulleys which hold the object in between properly through its solid grip. Block and tackle are two important systems which is in practice till today as it is used greatly to balance the objects.

These days, machine industries and other domains have found out other ways to lift and shift heavy objects from one place to another. Gone are those days when people had to think twice of ways as how they can use small pulley for pulling up heavy objects and machine spare parts.  Previously, pulley inventions lead to ease of machine transport inside the industries and factories. Later on gradually, this further led to the improvement of the chain hoist in air, manual and electric ways. Be it wooden furniture, rods, boilers, machinery, mechanical equipments, reactors in nuclear labs etc., these rock-iron hoists can protect them from explosion and provides heat suspension.

There are three varied categories in it:
  • Hand chain
  • Lever Ratchet
  • Differential
Major Issues to be take care of:

It is heavy in nature so you have to keep the weight lifter tight and screwed up tightly so that any mishaps or considerable expenses do not take place.

Chain Hoist is usually made of strong pulls which are complex in nature so that it can carry heavy weight. Being made by steel material and hosted by aluminum so that it can be resisted through electricity and also can avoid corrosion.

Electric Chain Hoist is usually used for elevating heavy-weighted industrial equipments so that it can conveniently push them to the destined place, be it be office or factory or open space.


Saturday, 15 September 2012

Different Types of Chain Hoist and its Working



There are many different varieties and assortments in which the Chain hoists are available in the market. Each one them has its own use and specialty for which it is known. The following are the different kinds that are available include differential, screw-geared, and spur-geared. The elaborate details for Differential hoist are presented here.

Differential hoists are the simplest type of chain hoist. It is made up of two sheaves on the upper block and one on the lower block. The throat and grooves of the upper sheaves are made with pockets that fit the links of the chain. One of the sheaves has one or two pockets less than the other. This difference in the number of pockets is called the differential. Each time the sheaves rotate one full turn, one side of the chain becomes one link shorter. This differential, as the sheaves are turned, provides the mechanical advantage necessary for lifting the weight.

The upper sheave, having the fewer pockets, is slightly smaller than the other sheave. The small sheave is the load side of the hoist. The differential hoist is the least efficient of all hoists, but probably the most common.
The actual operation mechanism is based on the pull of the chain that moves the wheel back and forth. As the chain is pulled around the inner load loop gets smaller or larger by the difference in the number of pockets on the wheel. As the lifting loop gets shorter the hand loop gets longer and vice versa. This is a bit of an inconvenience but the mechanism is as simple as they get. This is all about Differential ChainHoist.