In simple terms, a hoist may be defined as a device that is used for lifting as well as lowering load with the help of a chain wrapped around a drum, lift wheel or a rope. While various types of power mechanisms are available in the market, electric hoists are more popular than the other types. In the article below, you will get to know different types of 3 ton electric hoist available (disponible) in the market.
One of the most common types of 3 ton electric hoists is the welded link load chain hoist which includes a chain consisting of a series of interwoven and welded leaks. In this type of hoist, links fit the pockets of hoist load sprocket that is used for transmitting the motion to the load chain. The sprocket is sometimes also called load sheave, lift wheel, pocket wheel or load wheel. As far as the size is concerned, it is defined as the diameter of the wire used for forming the link.
It is important to mention here that the welded link load chain is designed for specific dimensions as well as various other requirements for a particular type of electric hoist. Therefore, it is extremely important to use the welded link load chain only as per the specifications mentioned by the manufacturer of the hoist.
Another type of electric hoist consists of a roller load chain which is made of a series of alternately assembled pin links and roller links. The rollers turn on the bushings and pins articulate inside bushings. The bushings and pins fit in the respective link plates. The motion is transferred to the load chain with the help of the teeth of the hoist sprocket. This sprocket is also known as pocket wheel, load sheave, load wheel and chain wheel. The size of roller load chain is defined as the distance between various pins (varios pines). It is important to keep in mind that the roller load chain is manufactured for specific hoist applications.
The third type of 3 ton electric hoist is the wire rope hoist that consists of a wire, a core and strands. The wire rope raps on to the grooves cut on the circumference of the drum and this is how the motion is transferred to the wire rope. The size of wire rope is determined by the diameter of the circle that encloses the wire ropes strands. As mentioned above, the wire rope is manufactured to a particular specification as decided by the hoist manufacturer (fabricante del polipasto).
The electric hoist is operated by the operator with the help of a control device which consists of various levers or the buttons that drive an electric motor. This electric motor transmits power and is used for lifting or lowering the load on the hoist load hook.
Overall, these are the major types of 3 ton electric hoists. Though manual and pneumatic powered hoists are also available in the market, most users prefer the electric hoists as these are easier to operate and much more efficient as compared to the other types of hoists. Look at more details of 3 ton hoist in http://polipastoelectrico.com.mx/polipasto-electrico-de-3-toneladas-3000-kg/.