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The mobile crawler crane is particular crane designed with either a lattice boom or a telescopic boom. These move upon the crawlers tracks. Since this crane is self-propelled, it could move around certain work sites without the need for a lot of set up. Due to their huge weight and size, crawler cranes are are hard to transport from one place to another and are rather costly. The crawler's tracks offer stability to the equipment and enable the crane to work without using outriggers, however, there are several models that do use outriggers. Also, the tracks provide the machine's movement.
Early Mobile Cranes
Initially, the first mobile cranes were mounted to train cars and move along specifically designed short rail lines. When the 20th century arrived, the crawler tractor changed and this brought the introduction of crawler tracks to the agricultural industry as well as the construction industry. Not long after, the crawler tracks were adopted by excavators and this further showcased the machine's versatility. It was not long after before manufacturers of cranes 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 first crane on crawler tracks. It described the new machine 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 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. Manufactured within Fort Wayne, Indiana, the Speedcrane was fifteen ton, steam-powered, wheel-mounted crane. In the year 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 in order to produce it and go into business.
Crown has made their RC 5500 Series to focus on the realistic difficulties experienced within the workplace. This innovative model features best-in-class comfort and ergonomics and intelligent technology. Keeping the operator comfortable and safe usually results in more efficiency.
3-Wheel Stand-Up Counterbalanced Truck
The company manufactures 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
The Crown RC 5500 excels in a busy work environment. This model achieves greatness whether it is operating on the dock or in an aisle. It is designed to provide the operator unmatched visibility, unparalleled ride control and the ultimate ergonomics. The exclusive FlexRide technology offered by Crown provides a suspended floorboard so as to eliminate a lot of the shock and vibration which operators have to work with each and 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 - From a side-stance position in both directions of travel, this unit offer maximum visibility for the operator. 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 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. Levels of performance are able to be custom tuned in order to match the application requirement or the operator's level of skill.
Operator Safety & Comfort
Crown's FlexRide has a suspended floorboard that could greatly enhance the overall work performance of the worker by enhancing their comfort and reducing their fatigue. The constant vibration and shock can lead to extreme operator exhaustion for those exposed to those motions on a daily basis specially during travel over expansion joints, rough grounds and dock plates.
