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The crawler crane is a particular type of mobile crane which is available with either a telescopic boom or a lattice boom which moves upon crawler tracks. As this unit is a self-propelled crane, it could move around a jobsite and accomplishing jobs without much set-up. Because of their huge weight and size, crawler cranes are are difficult to transport from one place to another and are rather expensive. The crawler's tracks provide stability to the equipment and allow the crane to function without utilizing outriggers, however, there are several models that do utilize outriggers. Furthermore, the tracks provide the machine's movement.
Early Mobile Cranes
The first mobile cranes were initially mounted to train cars. They moved along short rail lines which were specially made for the project. When the 20th century arrived, the crawler tractor changed and this brought the introduction of crawler tracks to the construction industry and the agricultural business. Not long after, the crawler tracks were adopted by excavators and this further featured the machine's versatility. It was not long after before manufacturers of cranes decided that the crawler track market was a safe bet.
The First Crawler Crane
Around the 1920s, Northwest Engineering, a crane company within the United States, mounted its first crane on crawler tracks. It described the new machinery as a "locomotive crane, independent of tracks and moveable under its own power." By the middle part of the 1920s, crawler tracks had become the chosen means of traction for heavy crane uses.
The Speedcrane
The Moore Speedcrane, developed by Ray and Charles Moore of Chicago, Illinois was amongst the first attempts to copy the rails for cranes. Manufactured in Fort Wayne, Indiana, the Speedcrane was fifteen ton, steam-powered, wheel-mounted crane. During 1925, a company called Manitowoc Shipbuilding Co, from Manitowoc, Wisconsin recognized the marketability and the potential of the tracked crane. They decided to team up with the Moore brothers to be able to produce it and go into business.
The Crown RC 5500 Series was built on a vision that focuses on realistic difficulties in the workplace. This ground-breaking unit features best-in-class ergonomics and comfort and intelligent technology. Keeping the operator safe and comfortable generally results in more efficiency.
3-Wheel Stand-Up Counterbalanced Truck
The company produces a 3-Wheel Stand-Up Counterbalanced Truck in capacities varying from 3000, 3500\three thousand five hundred and four thousand pound capacity.
Performance Versatility
Crown's RC 5500 have been designed to work efficiently in a busy work setting. Whether it is operating in an aisle or on the dock, this model achieves greatness. It has been made to provide the operator unparalleled ride control, unmatched visibility and the best ergonomics. The exclusive FlexRide technology offered by Crown offers a suspended floorboard in order to eliminate a lot of the shock and vibration which operators must work with each and every day. Interestingly enough, many of the competitor's sit-down truck units could not match the reduced impact levels provided by the RC 5500 Series.
Visibility - Maximum visibility is offered for the operator from a side-stance position in both directions of travel. A low-profile provides a clear view mast as well a sculpted chassis allows the operators to be able to clearly see all around the truck, the fender and the fork tips. This optimum view lessens damage and enhances overall safety.
Speed - Through Access 1 2 3 Technology combined with the latest AC traction control, top travel speeds are amongst the best in the business and achieved. Levels of performance can be custom tuned in order to match the application needs or the operator's level of skill.
Operator Safety & Comfort
The suspended floorboard provided by Crown's FlexRide greatly enhances overall work performance by improving comfort and exhaustion is significantly reduced. The constant shock and vibration can cause severe operator exhaustion for those exposed to those motions on a daily basis specially during travel over rough floors, dock plates and expansion joints.
