The crane features three versions with maximum loads of 25, 37.5 and 50 tonnes and can be erected with reach of between 30 and 80 metres with configurations every 5 metres.
In addition, an optional jib configuration is available allowing a special reach of 85 metres.
The characteristics of load, reach and mechanisms of the 21LC1050 make this model ideal to offer an optimal result in large industrial or mining projects, as well as for the construction of buildings with prefabricated and steel structures of great tonnage.
Thanks to its maximum load of 50 tonnes, the 21LC1050 becomes the largest capacity crane of the Comansa 2100 Series, formed entirely by flat-top models of large tonnage.
Throughout the entire range, this crane is only surpassed by the LCL700 luffer, with 64 tonnes of maximum load, and the Flat-Top models 30LC1100 and 30LC1450, which have maximum loads of 64 and 90 tonnes, respectively.
The design of the slewing part of the new crane is similar to that of the 21LC750 and 21LC660. Instead of having a cusp element, the jib and counterjib join directly on the slewing part, which allows a much faster and safer assembly.
The 21LC1050 also shares a large part of the jib and counterjib sections with its “little siblings” 21LC750 and 21LC660, which allows optimizing the investment to customers who already own those models.
The design of the 21LC1050’s counterjib allows numerous different configurations to better adapt to the needs of each job.
Always having a counterjib radius as short as possible avoids possible interference with buildings or other cranes present on the same jobsite, thus increasing safety. The complete structure of the counterjib consists of five modular elements that allow up to six different configurations. Thus, when the crane is assembled with a maximum range of 80 metres, the counterjib radius is 31 metres.
The 21LC1050 is erected on a new tower section of 2.5 metres in width, and is compatible with the rest of the mast sections of the same width from Comansa.
In fact, this section, called D36B, will become the standard for other Comansa models with similar sections, such as the 21LC750 or the LCL700 luffer.
The hoist cable of the 21LC1050 is compacted and only 20 mm in diameter, which allows all hoist mechanisms to have drums with high rope capacity. The standard mechanism has capacity for 720 metres of wire rope and reaches speeds of up to 166 metres per minute in the versions of 25 and 37.5 tonnes, and 83 metres per minute in the 50 tonne version.
Thanks to Comansa’s single-double trolley system with automatic reeving change, the 21LC1050 crane always has an optimized load diagram. Working with the front trolley, the crane improves its tip loading capacity and reaches higher hoist speeds. With the double trolley, the crane can work with the heaviest loads. For those projects where heavy loads are constantly being lifted and the crane does not require reeving change, the 50-tonne version has a simple trolley as an optional element.
Like the rest of Comansa’s flat-top models, the 21LC1050 comes standard with the PowerLift system, which allows the crane to improve the load diagram by 10 per cent without exceeding the nominal capacity. In this way, if the jib-end load of the 25 tonne model is 10,800 kg, when the crane driver operates the PowerLift system from the controls, the maximum load at the jib end increases to 11,880 kg.
The 21LC1050 also includes the new J3-20 climbing cage. This hydraulic cage is compatible with other models from Comansa, like the LCL700 luffing-jib crane, and has a pushing force of 200 tonnes, greater than any other jacking cage for 2.5-metre-wide mast sections from the manufacturer. In addition, the new cage introduces other novelties with respect to other Comansa cages, since it speeds up the climbing process and reduces assembly time.
The 21LC1050 comes standard with the new CUBE cab in its XL version, the most spacious from Comansa.
The cabin, which has received the “If” design award, ensures great productivity thanks to its fully-glazed front and provides great comfort to the operator of the machine.