Liebherr has supplied Mammoet with rope winches for its SK6000 crane.
A crucial component of the SK6000, a gear ring rope winch allows the ring crane to lift extremely high loads. The four-gear ring rope winches have a rope pull of 600 kN each, facilitating lifts of up to 6,000 tonnes.
Liebherr and Mammoet collaborated on the construction and calculation of the winch design, adapting the technical characteristics of the rope winches to the crane requirements.
These requirements include the technical lifting properties as well as the compact external dimensions of the winches which allow them to be stored in shipping containers for the global transportation of the SK6000.
“Within the scope of the project, Mammoet also made use of Liebherr’s extensive components portfolio: the large winches, for instance, were equipped with Liebherr-own gear rings, gearboxes and electric motors,” said Markus Groeber, technical sales engineer at Liebherr drive technology.
Along with a maximum lifting capacity of 6,000 tonnes and being capable of lifting components weighing up to 3,000 tonnes to a height of 220 m, the SK6000 has a maximum slewing radius of 59 m and a main boom length of up to 171 m. With the fixed jib attachment, it can reach a total lifting height of 274 m.
Being fully electric, the SK6000 ring crane has been designed for projects such as placing floating wind turbine foundations on ships from the quayside and erecting entire wind turbines.
