Comansa said the new models are an evolution of the 21LC550. They are offered in two options: 20 and 25t maximum load, with jib lengths between 30 and 80m, which can be configures every 5m. The maximum tip load is 4.95t.

The tower sections used are 2.5×2.5m and their freestanding height is 85.8m.

Compared with the 21LC550 model, the load capacities of the new ones are on average 16% higher for the 21LC600 and 23% higher for the 21LC650. The new models also have a shorter, modular counter-jib ranging from 24.4 to 16.4m with five possible configurations; a feature that has already been used on the 21LC750, 21LC1050 and 21LC1400 cranes.

Comansa said the access to the turntable and the rotation part has also been improved. “The cathead has been redesigned to facilitate the passage of lifting cables, including a welded ladder that allows access to the highest part without the need for the cab platform. Access to the cab platform is now direct via the turntable thanks to the folding ladder, preventing falls while working on the upper level and also being easier to transport,” the manufacturer said.

As a standard feature, both crane models offer the double trolley system with automatic changeover, but a single trolley is also an option. Another feature is the new J3A-11 climbing cage, which follows the concept of the J3-20.

Regarding hoists, the standard for the 20t version is 50kW, while for the 25t version it is 65kW. The 110kW engine is optional for both versions, with a speed of up to 290m/min and maximum capacities of 1,570m of cable. “The Effi-Plus technology, fitted as standard, significantly increases lifting and lowering speeds for light loads, shortening working cycles without increasing power or consumption,” said the manufacturer.

Both models come as standard with the CUBE cab in its L version, with the XL available as an option. 

Comansa says the 21LC600 and 21LC650 flat top tower cranes can be used for the construction of residential and commercial buildings, as well as power plants, mining, bridges and other high-commitment infrastructure.