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The crawler crane is a specific kind of mobile crane that is offered with either a telescopic boom or a lattice boom which moves upon crawler tracks. As this unit is a self-propelled crane, it is capable of moving around a jobsite and completing jobs without a lot of set-up. Due to their huge size and weight, crawler cranes are are difficult to transport from one site to another and are fairly pricey. The crawler's tracks provide stability to the machine and allow the crane to function without the use of outriggers, however, there are several units which do utilize outriggers. As well, 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 specifically constructed for the project. Once the 20th century arrived, the crawler tractor evolved and this brought the introduction of crawler tracks to the agricultural business as well as the construction business. Not long after, excavators adopted the crawler tracks and this further showcased the versatility of the equipment. It was not long after before manufacturers of cranes decided that the crawler track market was a safe bet.
The Very First Crawler Crane
Around the 1920s, Northwest Engineering, a crane manufacturer 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 nineteen twenties, crawler tracks had become the chosen means of traction for heavy crane uses.
The Speedcrane
Developed by Ray and Charles 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 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 in order to produce it and go into business.
Crown has designed their RC 5500 Series to focus on the realistic difficulties experienced within the workplace. This innovative model features best-in-class ergonomics and comfort and intelligent technology. Keeping the operator comfortable and safe normally leads to more productivity.
3-Wheel Stand-Up Counterbalanced Truck
The 3-Wheel Stand-Up Counterbalanced Truck comes in three thousand, 3500 and 4000 lb. capacity.
Performance Versatility
Crown's RC 5500 have been made to work effectively in a busy work environment. Whether it is operating in an aisle or on the dock, this model achieves greatness. It has been designed to offer the operator unparalleled ride control, unmatched visibility and the ultimate ergonomics. The exclusive FlexRide technology provided by Crown provides a suspended floorboard so as to eliminate much of the shock and vibration that operators should work with every day. Interestingly enough, a lot of the competitor's sit-down truck units could not match the lessened 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 all around the truck, the fender and the fork tips. This optimum view enhances overall safety and lessens damage.
Speed - Top travel speeds are amongst the best in the business and achieved through Access 1 2 3 Technology combined with the newest AC traction control. Levels of performance could be custom tuned in order to match the operator's level of skill or the application needs.
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 vibration and shock could lead to extreme operator fatigue for those exposed to those motions on a daily basis specially during travel over dock plates, expansion joints and rough surfaces.
