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The crawler crane is a particular kind of mobile crane which is available with either a telescopic boom or a lattice boom which moves upon crawler tracks. Since this unit is a self-propelled crane, it could move around a jobsite and accomplishing tasks without a lot of set-up. Due to their huge weight and size, crawler cranes are are hard to transport from one location to another and are fairly expensive. The crawler's tracks provide stability to the equipment and allow the crane to work without utilizing outriggers, however, there are some models which do utilize outriggers. Furthermore, the tracks provide the movement of the machinery.
Early Mobile Cranes
The first mobile cranes were originally mounted to train cars. They moved along short rail lines that were specifically made for the project. When the 20th century arrived, the crawler tractor evolved and this brought the introduction of crawler tracks to the agricultural industry and the construction industry. Not long after, excavators adopted the crawler tracks and this further showcased the versatility of the machine. It was not long after when 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 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 preferred means of traction for heavy crane operations.
The Speedcrane
The Moore Speedcrane, developed by Charles and Ray 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 nineteen twenty five, a company referred to as 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 produce it and go into business.
Crown has made their RC 5500 Series to concentrate on the realistic challenges experienced in the workplace. This ground-breaking model features intelligent technology and best-in-class ergonomics and comfort. Keeping the operator safe and comfortable normally results in more productivity.
3-Wheel Stand-Up Counterbalanced Truck
The 3-Wheel Stand-Up Counterbalanced Truck comes in three thousand, 3500 and four thousand lb. capacity.
Performance Versatility
The Crown RC 5500 excels in a busy work environment. This unit achieves greatness whether it is operating in an aisle or on the dock. It is made to offer the operator unmatched visibility, unparalleled ride control and the best ergonomics. The exclusive FlexRide technology provided by Crown provides a suspended floorboard so as to eliminate much of the shock and vibration that operators must work with on a daily basis. Interestingly enough, many of the competitor's sit-down truck models are unable to 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 allows the operators to be able to clearly see the fender, the fork tips and all around the truck. This optimum view lessens damage and enhances overall safety.
Speed - Through Access 1 2 3 Technology combined with the newest AC traction control, top travel speeds are among the best within the business and achieved. Levels of performance can be custom tuned in order to match the operator's skill level or the application needs.
Operator Safety & Comfort
The suspended floorboard provided by Crown's FlexRide significantly improves overall work performance by improving comfort and fatigue is greatly lessened. The continuous vibration and shock can lead to extreme operator fatigue for those exposed to those motions on a daily basis specially during travel over expansion joints, rough floors and dock plates.
