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The crawler crane is a specific type of mobile crane which is available with either a telescopic boom or a lattice boom that 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. Due to their huge weight and size, crawler cranes are rather costly and even difficult to transport from one site to another. The crawler's tracks provide the machinery stability and enable the crane to work without using outriggers, although, there are some models that do use outriggers. Furthermore, the tracks provide the machine's movement.
Early Mobile Cranes
The very first mobile cranes were originally mounted to train cars. They moved along short rail lines that were particularly made for the project. Once the 20th century arrived, the crawler tractor changed 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 versatility of the machine. It was not long after when manufacturers of cranes decided that the crawler track market was a safe bet.
The Very First Crawler Crane
Northwest Engineering, a crane manufacturer in the USA, was the very first to mount its crane on crawler tracks during the nineteen twenties. 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 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 replicate the rails for cranes. Made in Fort Wayne, Indiana, the Speedcrane was fifteen ton, wheel-mounted, steam-powered crane. In nineteen twenty five, a company known as 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 to be able to manufacture it and go into business.
Crown has designed their RC 5500 Series to concentrate on the realistic difficulties faced within the workplace. This innovative model features best-in-class comfort and ergonomics and intelligent technology. Keeping the operator safe and comfortable generally leads to more productivity.
3-Wheel Stand-Up Counterbalanced Truck
The 3-Wheel Stand-Up Counterbalanced Truck comes in 3000, 3500 and 4000 pound capacity.
Performance Versatility
The Crown RC 5500 excels in a busy work setting. This model achieves greatness whether it is operating on the dock or in an aisle. It is designed to offer the operator unmatched visibility, unparalleled ride control and the ultimate ergonomics. The exclusive FlexRide technology offered by Crown offers a suspended floorboard so as to eliminate a lot of the shock and vibration which operators should work with every day. Interestingly enough, many of the competitor's sit-down truck units could not match the lessened impact levels provided by the RC 5500 Series.
Visibility - From a side-stance position in both directions of travel, this model offer maximum visibility for the operator. A low-profile offers 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 reduces damage and improves overall safety.
Speed - Top travel speeds are among the best within the industry and achieved through Access 1 2 3 Technology combined with the newest AC traction control. Performance levels could be custom tuned to be able to match the application requirement or the operator's level of skill.
Operator Safety & Comfort
Crown's FlexRide has a suspended floorboard which could greatly improve the overall work performance of the worker by enhancing their comfort and lessening their fatigue. The continuous shock and vibration can cause severe operator exhaustion for those exposed to those motions everyday especially during travel over dock plates, expansion joints and rough surfaces.
