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The crawler crane is a particular type of mobile crane that is available with either a lattice boom or a telescopic boom that moves upon crawler tracks. As this unit is a self-propelled crane, it could move around a jobsite and completing jobs without much set-up. Because of their enormous size and weight, crawler cranes are fairly expensive and even difficult to transport from one site to another. The crawler's tracks provide the machine stability and allow the crane to work without the use of outriggers, although, there are several units that do utilize outriggers. What's more, the tracks provide the movement of the machine.
Early Mobile Cranes
Originally, the first mobile cranes were mounted to train cars and move along specifically made short rail lines. Once the 20th century arrived, the crawler tractor changed and this brought the introduction of crawler tracks to the construction business as well as the agricultural industry. Not long after, the crawler tracks were adopted by excavators and this further showcased the versatility of the machine. It was not long after when crane companies decided that the crawler track market was a safe bet.
The First Crawler Crane
In the 1920s, Northwest Engineering, a crane company in the United States, mounted its first crane on crawler tracks. It described the new equipment as a "locomotive crane, independent of tracks and moveable under its own power." By the mid-1920s, crawler tracks had become the chosen means of traction for heavy crane operations.
The Speedcrane
The Moore Speedcrane, developed by Charles and Ray Moore of Chicago, Illinois was among the first attempts to copy the rails for cranes. Manufactured in Fort Wayne, Indiana, the Speedcrane was fifteen ton, steam-powered, wheel-mounted crane. In nineteen twenty five, a company called Manitowoc Shipbuilding Co, from Manitowoc, Wisconsin recognized the tracked crane's potential and marketability. They decided to team up with the Moore brothers in order to produce it and go into business.
The Crown RC 5500 Series was built on a vision that focuses on realistic challenges in the workplace. This ground-breaking model features best-in-class comfort and ergonomics and intelligent technology. Keeping the operator comfortable and safe usually leads to more efficiency.
3-Wheel Stand-Up Counterbalanced Truck
The company produces a 3-Wheel Stand-Up Counterbalanced Truck in capacities varying from three thousand, 3500\three thousand five hundred and four thousand pound capacity.
Performance Versatility
The Crown RC 5500 excels in a busy work setting. This unit achieves greatness whether it is operating on the dock or in an aisle. It is made to offer the operator unmatched visibility, unparalleled ride control and the best ergonomics. The exclusive FlexRide technology offered by Crown offers a suspended floorboard in order to eliminate much of the shock and vibration that operators have to work with every day. Interestingly enough, a lot of the competitor's sit-down truck units could not match the reduced impact levels offered by the RC 5500 Series.
Visibility - Maximum visibility is provided for the operator from a side-stance position in both directions of travel. A low-profile offers a clear view mast as well a sculpted chassis enables the operators to be able to clearly see the fork tips, all around the truck and the fender. This optimum view improves overall safety and lessens damage.
Speed - Through Access 1 2 3 Technology combined with the latest AC traction control, top travel speeds are among the best within the business and achieved. Performance levels are able to be custom tuned in order to match the application requirement or the operator's level of skill.
Operator Safety & Comfort
The suspended floorboard provided by Crown's FlexRide significantly enhances overall work performance by improving comfort and fatigue is significantly lessened. The constant vibration and shock could cause severe operator fatigue for those exposed to those motions on a daily basis specially during travel over dock plates, expansion joints and rough floors.
