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The mobile crawler crane is specific crane made with either a telescopic boom or a lattice boom. These move upon the crawlers tracks. As this crane is self-propelled, it could move around particular work sites without the need for much set up. Due to their huge weight and size, crawler cranes are are difficult to transport from one site to another and are fairly costly. The crawler's tracks provide the machinery stability and allow the crane to work without the use of outriggers, however, there are some models that do utilize outriggers. As well, the tracks provide the machine's movement.
Early Mobile Cranes
The very first mobile cranes were originally mounted to train cars. They moved along short rail lines which were specially constructed for the project. Once the 20th century arrived, the crawler tractor changed and this brought the introduction of crawler tracks to the construction business and the agricultural business. Not long after, the crawler tracks were adopted by excavators and this further showcased the equipment's versatility. It was not long after before crane manufacturers decided that the crawler track market was a safe bet.
The Very First Crawler Crane
Northwest Engineering, a crane manufacturer within the United States, was the very first to mount its crane on crawler tracks in the 1920s. 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 operations.
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. Made within Fort Wayne, Indiana, the Speedcrane was a steam-powered, wheel-mounted, 15 ton crane. During 1925, 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 so as to produce it and go into business.
The Crown RC 5500 Series was built on a vision that concentrates on realistic difficulties in the workplace. This innovative unit features intelligent technology and best-in-class comfort and ergonomics. Keeping the operator comfortable and safe usually leads to more efficiency.
3-Wheel Stand-Up Counterbalanced Truck
The 3-Wheel Stand-Up Counterbalanced Truck comes in three thousand, three thousand five hundred and four thousand lb. capacity.
Performance Versatility
The Crown RC 5500 excels in a busy work environment. This model achieves greatness whether it is operating in an aisle or on the dock. It is made to provide the operator unmatched visibility, unparalleled ride control and the best ergonomics. The exclusive FlexRide technology offered by Crown provides a suspended floorboard in order to eliminate much of the vibration and shock which operators must work with on a daily basis. Interestingly enough, many of the competitor's sit-down truck models are unable to 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 the fork tips, all around the truck and the fender. This optimum view lessens damage and enhances overall safety.
Speed - Top travel speeds are among the best in the business and achieved through Access 1 2 3 Technology combined with the newest AC traction control. Performance levels could 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 greatly enhances overall work performance by improving comfort and exhaustion is greatly lessened. The constant shock and vibration could cause extreme operator exhaustion for those exposed to those motions everyday particularly during travel over dock plates, expansion joints and rough floors.
