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The crawler crane is a specific type of mobile crane which is offered with either a telescopic boom or a lattice boom which moves upon crawler tracks. Because this unit is a self-propelled crane, it is capable of moving around a jobsite and completing jobs without a lot of set-up. Because of their huge size and weight, crawler cranes are are hard to transport from one site to another and are rather costly. The crawler's tracks offer the equipment stability and allow the crane to work without using outriggers, however, there are some units which do use outriggers. What's more, the tracks provide the movement of the machinery.
Early Mobile Cranes
Initially, the very first mobile cranes were mounted to train cars and move along specifically built short rail lines. Once the 20th century arrived, the crawler tractor evolved and this brought the introduction of crawler tracks to the agricultural business and the construction industry. Not long after, the crawler tracks were adopted by excavators and this further featured the equipment's versatility. It was not long after before crane manufacturers decided that the crawler track market was a safe bet.
The First Crawler Crane
Northwest Engineering, a crane company in the USA, was the first to mount its crane on crawler tracks in the nineteen twenties. It described the new machine 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 copy rail lines for cranes. Made in Fort Wayne, Indiana, the Speedcrane was fifteen ton, wheel-mounted, steam-powered crane. During the year 1925, a company known as Manitowoc Shipbuilding Co, from Manitowoc, Wisconsin recognized the potential and the marketability of the tracked crane. They decided to team up with the Moore brothers so as to manufacture it and go into business.
Crown has made their RC 5500 Series to focus on the realistic challenges faced in the workplace. This ground-breaking unit features best-in-class comfort and ergonomics and intelligent technology. Keeping the operator safe and comfortable usually results in more productivity.
3-Wheel Stand-Up Counterbalanced Truck
The company produces a 3-Wheel Stand-Up Counterbalanced Truck in capacities varying from 3000, 3500\three thousand five hundred and four thousand lb. capacity.
Performance Versatility
Crown's RC 5500 have been designed to work efficiently in a busy work setting. Whether it is operating on the dock or in an aisle, this model achieves greatness. It has been designed to provide the operator unmatched visibility, unparalleled ride control and the ultimate ergonomics. The exclusive FlexRide technology provided by Crown offers a suspended floorboard in order to eliminate much of the vibration and shock that operators have to work with every day. Interestingly enough, many of the competitor's sit-down truck units are unable to match the lessened impact levels offered by the RC 5500 Series.
Visibility - Maximum visibility is offered 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 the fender, the fork tips and all around the truck. This optimum view enhances overall safety and reduces damage.
Speed - Top travel speeds are among the best within the business and achieved through Access 1 2 3 Technology combined with the newest AC traction control. Performance levels are able to be custom tuned in order to match the application requirement or the operator's level of skill.
Operator Safety & Comfort
The suspended floorboard provided by Crown's FlexRide greatly improves overall work performance by improving comfort and fatigue is significantly reduced. The constant vibration and shock could lead to severe operator exhaustion for those exposed to those motions on a daily basis particularly during travel over dock plates, expansion joints and rough surfaces.
