The new models 21LC600 and 21LC650 offer a lifting capacity of 20 to 25 t and 85 m at the tip as well as improvements in the modularity, which enable an optimization of the use on site
Tower crane manufacturer Comansa has added two new models to its 21LC series of flat cranes, each with an average load capacity of 16% and 23% higher than the existing 21LC550 model from which they emerged.
The new 21LC600 and 21LC650 models offer maximum load capacities of 20 t and 25 t and can be assembled with ranges between 30 and 80 m with configurations every 5 m, allowing a maximum point load of up to 4.95 t. Both models also have an optional boom configuration that allows the total reach at the tip to be increased to 85 m.
A statement from Comansa states that the first of the new features on these models is that they have a shorter, modular counter-jib that goes from 24.4 to 16.4 m and has up to five possible configurations. This concept has a precedent in Comansa’s 21LC750, 21LC1050 and 21LC1400 models and offers better adaptation to the work configuration in a confined space.
Comansa said another strength of these models is the improved access to the turntable and rotating part: the kathead has been redesigned to make it easier for lifting cables to pass through, including a welded ladder that allows access to the highest part without the need of the cabin platform is required.
Thanks to the folding ladder, the cabin platform can now be accessed directly via the turntable. This prevents falls when working on the upper level and is also easier to transport.
As standard, both crane models offer the double wagon system with automatic changeover (called DT in the data sheets) and, as a novelty, have the optional availability of a single wagon (ST), which simplifies maintenance work and at the same time increases the load capacity.Short boom lengths.
The height self-supporting with a built-in base can reach up to 85.8 m. In addition, the tower sections for both models are 2.5 square meters, said the Spanish tower crane specialist.
Starting with the launch of the new cranes, Comansa has also introduced a new climbing cage, the J3A-11, which follows the concept of the brand’s earlier J3-20, with a greater length and greater spacing between the rollers. This saves time when the scale is restored thanks to the supplied additional elevator, which can also be transported in standard containers or trucks.
The standard for the elevator motors is 50 kW for the 20 t version and 65 kW for the 25 t version.
A 110 kW motor is optional for both versions, with a speed of up to 290 m / min and a maximum capacity of 1,570 m of cable. The standard Effi-Plus technology significantly increases the lifting and lowering speed with light loads and shortens the work cycles without increasing performance or consumption.
Comansa added that the modularity, which is an inherent quality of its cranes, allows certain boom sections to be swapped out within the 21LC crane range, allowing landlords to reduce their inventory levels and optimize their investments as they can order these new cranes with a shorter boom length, if earlier cranes of the same series are in stock.
Both models are equipped as standard with the L-version of the CUBE cabin from Comansa. The XL is optionally available. The company states that the cab is an innovative design that is safer, more comfortable, and gives the operator a full view of the load and work area, making it easier for them to operate thanks to the built-in digital control technology.
The assembly of the new models is also easier, faster and safer, and extends the life of the structure, says Comansa. The 21LC600 and 21LC650 flat tower cranes can be used for both residential and commercial construction and residential and commercial construction for power plants, mining, bridges and other high engagement infrastructure.
