Hydraulic cranes, heavy equipment, mainly used for lifting. Their design has two basic necessities: they must be able to lift a certain amount of weight, and they must be able to do so while maintaining stability. While cranes have been used throughout the century these days, they offer more technical designs that have several different types. Each type of crane has its own strengths and weaknesses, and is therefore best suited for certain types of applications. It is important to understand the things that are purchased when they make you have a good chance to make the right choice. In order to lift these heavy loads, hydraulic cranes, using three important components, lever, pulley, hydraulic cylinder. Lever is basically a horizontal beam for the fulcrum. When loaded into the smaller end is a heavy object, it may be canceled using a relatively small amount of force applied to the other end and in the opposite direction. Next there is a pulley, also known as an arm, which is a tilted support that supports the pulley block. This fixed block cable is wrapped around it by hand or machine several times. Such a force, equal to the weight of the load is the use of mechanical advantages that can be created. Finally, there is a direct or indirect lift load hydraulic cylinder. There are several different types of hydraulic cranes and understand the difference between them and can help you choose the best one for you. Railway cranes - mainly used for railway maintenance work, such as flange wheels, so it may travel when the track. It is possible to be installed into a rail car, or a more complex model must be custom designed for simplicity. Tower Crane - is a modern balanced crane that can be fixed on the ground or connected to a building or other structure. They generally choose their height and lifting capacity, is an important part of the construction of high-rise buildings. Self-erection of cranes - Tower cranes are a special type that can actually allow the lower part of the crane to be lifted from the ground. So they can be assembled easily without the help of the outside world. Telescopic Crane - Use a hot tube installed in it. The expansion of the hydraulic system and the upsurge of the compression tube make the total length possible. This is the best short-term rescue or construction work. Industrial casters in the construction has played a very important role, quality is also very important!