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The crawler crane is a specific type of mobile crane which is available with either a lattice boom or a telescopic boom that moves upon crawler tracks. As this model is a self-propelled crane, it could move around a jobsite and completing tasks without much set-up. Because of their huge weight and size, crawler cranes are are hard to transport from one site to another and are rather expensive. The crawler's tracks provide the equipment stability and allow the crane to function without utilizing outriggers, however, there are several units that do utilize outriggers. What's more, the tracks provide the equipment'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 built for the project. Once the 20th century arrived, the crawler tractor evolved and this brought the introduction of crawler tracks to the agricultural industry and the construction business. Not long after, the crawler tracks were adopted by excavators and this further featured the equipment's versatility. It was not long after when crane manufacturers decided that the crawler track market was a safe bet.
The First Crawler Crane
In the 1920s, Northwest Engineering, a crane company in the USA, mounted its very 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 preferred means of traction for heavy crane uses.
The Speedcrane
Developed by Charles and Ray Moore of Chicago, Illinois; the Moore Speedcrane was among the first to attempt to replicate rail lines for cranes. Manufactured within Fort Wayne, Indiana, the Speedcrane was a steam-powered, wheel-mounted, fifteen ton crane. During the year 1925, a company called Manitowoc Shipbuilding Co, from Manitowoc, Wisconsin recognized the tracked crane's marketability and potential. They decided to team up with the Moore brothers in order to manufacture it and go into business.
Crown has designed their RC 5500 Series to focus on the realistic challenges experienced within the workplace. This innovative unit features intelligent technology and best-in-class comfort and ergonomics. Keeping the operator comfortable and safe generally results in more efficiency.
3-Wheel Stand-Up Counterbalanced Truck
The company produces a 3-Wheel Stand-Up Counterbalanced Truck in capacities ranging from three thousand, 3500\three thousand five hundred and four thousand pound capacity.
Performance Versatility
Crown's RC 5500 have been made to work effectively in a busy work environment. Whether it is operating on the dock or in an aisle, this unit achieves greatness. It has been designed to provide the operator unparalleled ride control, unmatched visibility and the best ergonomics. The exclusive FlexRide technology provided by Crown offers a suspended floorboard so as to eliminate a lot of the shock and vibration that operators must work with each day. Interestingly enough, a lot of the competitor's sit-down truck models are unable to match the lessened impact levels provided by the RC 5500 Series.
Visibility - From a side-stance position in both directions of travel, this unit offer maximum visibility for the operator. 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 reduces damage and improves overall safety.
Speed - Top travel speeds are among the best in the business and achieved through Access 1 2 3 Technology combined with the latest AC traction control. Performance levels can be custom tuned in order to match the application needs or the operator's skill level.
Operator Safety & Comfort
Crown's FlexRide has a suspended floorboard that could significantly improve the overall work performance of the employee by enhancing their comfort and lessening their fatigue. The constant shock and vibration could result in severe operator exhaustion for those exposed to those motions everyday particularly during travel over dock plates, expansion joints and rough surfaces.
