Luffing marvellous: faster lifting jib crane
01 October 2019 | Web Article Number: ME201916329
THE Potain MR 418 luffing jib cranes, which is equipped with full frequency-controlled mechanisms for precision control, offers fast lifting speeds. Maximum capacity for the crane is 24 t and the maximum jib length is 60 metres.
That’s according to Crane & Hoist Equipment SA, the sub-Saharan distributor of the Potain brand of tower crane. In addition, said the company, the MR 418 is compact, quick to assemble and commission, as well as boasting extremely fast lifting speeds on high rise job sites.
“The crane delivers its best performance when fitted with the optional 270 LVF 120 hoist which offers industry leading lifting capability and is perfect for high rise buildings, including super tall structures,” the company said in a statement.
The 200 kW (270 hp) hoist provides 826 metres of rope capacity, which means that in a single-fall configuration a hook path of 413 metres is possible, while in a two-fall configuration 206 metres of vertical reach is possible.
“In addition, the winch can reach speeds of up to 254m/min for better productivity, while the power control function means it can operate off varying power inputs, allowing it to cope with lower power supplies on site.”
Customers not requiring the full power of the 270 LVF 120 hoist winch can choose the 150 LVF 120 hoist. This hoist has a drum capacity of 552 metres and can produce line speeds of up to 210 m/min. “The flexibility of choice with the design means customers can select the optimal configuration for them, ensuring they earn the best possible financial returns for their requirements.”
The luffing mechanism and hoist are uniquely mounted inside the counter jib while there is also a large, easily accessible service platform behind the cab, giving technicians a single location from which to access all major service points.
Quickly getting the crane into service comes courtesy of a new on-board control system that allows the technician to commission the crane into operation just minutes after assembly is completed. “Simple input of the jib length, working height and test load into the crane’s control board allows for a fast and accurate calibration,” the company said.
“In terms of working height, Potain’s intelligent mast system gives the crane enhanced flexibility to cope with the challenges of modern high-rise buildings.” The crane can be installed on fixing angles or on various sized chassis of 6m x 6m; 8m x 8m; and 10m x 10m.
For example, a freestanding height of 86m can be achieved on a 10m x 10m chassis when fitted with 40m of jib. “And with its design focus on high-rise applications, the crane needs only three anchorages to reach a working height of 197m when fitted with 30m of jib and fixing angle P854A (wind condition FEM 1.001).”