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The crawler crane is a specific kind of mobile crane that is offered with either a lattice boom or a telescopic boom that moves upon crawler tracks. Since this unit is a self-propelled crane, it could move around a jobsite and completing jobs without much set-up. Because of their enormous size and weight, crawler cranes are rather costly and even difficult to transport from one site to another. The crawler's tracks provide stability to the machine and allow the crane to work without utilizing outriggers, however, there are several models which do utilize outriggers. What's more, the tracks provide the equipment's movement.
Early Mobile Cranes
The very first mobile cranes were initially mounted to train cars. They moved along short rail lines which were particularly made for the project. When the 20th century arrived, the crawler tractor evolved and this brought the introduction of crawler tracks to the construction business as well as the agricultural industry. Not long after, excavators adopted the crawler tracks and this further featured the equipment's versatility. It was not long after before manufacturers of cranes decided that the crawler track market was a safe bet.
The Very First Crawler Crane
In the 1920s, Northwest Engineering, a crane manufacturer within 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 chosen means of traction for heavy crane uses.
The Speedcrane
The Moore Speedcrane, developed by Ray and Charles Moore of Chicago, Illinois was one of the first attempts to copy the rails for cranes. Manufactured within Fort Wayne, Indiana, the Speedcrane was 15 ton, steam-powered, wheel-mounted crane. During 1925, 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 manufacture it and go into business.
Crown has made their RC 5500 Series to focus on the realistic difficulties experienced 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 productivity.
3-Wheel Stand-Up Counterbalanced Truck
The company produces a 3-Wheel Stand-Up Counterbalanced Truck in capacities ranging from 3000, 3500\three thousand five hundred and 4000 lb. capacity.
Performance Versatility
The Crown RC 5500 excels in a busy work setting. This unit achieves greatness whether it is operating in an aisle or on the dock. It is designed to offer the operator unparalleled ride control, unmatched visibility and the best ergonomics. The exclusive FlexRide technology offered by Crown offers a suspended floorboard so as to eliminate a lot of the vibration and shock that operators should work with on a daily basis. Interestingly enough, many of the competitor's sit-down truck models could not match the lessened impact levels provided 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 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 enhances overall safety and lessens damage.
Speed - Through Access 1 2 3 Technology combined with the newest AC traction control, top travel speeds are amongst the best within the industry and achieved. Performance levels could be custom tuned in order to match the application requirement or the operator's skill level.
Operator Safety & Comfort
The suspended floorboard provided by Crown's FlexRide greatly enhances overall work performance by enhancing comfort and fatigue is significantly lessened. The constant shock and vibration can lead to extreme operator exhaustion for those exposed to those motions everyday particularly during travel over expansion joints, rough floors and dock plates.
