Liebherr introduced the latest generation of the LB 35 drilling rig. The LB35.1 is equipped with a new lattice boom extension, enabling greater drilling depths for the compact machine. The more powerful engine ensures even greater operational efficiency and makes the exhibit a flexible machine for deep foundation applications.
The LB series tackles applications such as Kelly drilling, continuous flight auger drilling or double rotary drilling.
For applications using full or partial displacement equipment, the maximum drilling depth has been extended to 37.5 metres, thanks to the new lattice boom extension. This equals an increase of 6 metres. For contractors, this allows the compact LB 35.1 to be deployed, even for large pile depths. The lattice boom extension can be easily retrofitted to any LB 35.1 and LB 45.1.
The new model is also fitted with a more powerful 603 hp diesel engine and delivers torque of 255,934 foot pounds. The maximum line pull of the winches is 300 kilonewtons.
Due to elastic mounting, noise emissions are considerably reduced. Thanks to the parallel kinematics, the machine has a large working area, which enables short working cycles.
The leader top is designed for different drilling axes and is suitable for all applications. Both the leader and the counterweights are modularly designed making the machine particularly user-friendly and flexible to use. The LB 35.1 can be transported in one piece with a folded leader, which results in reduced set-up work and enables the machine to be moved quickly between jobsites.
Automation systems
Drilling tasks of the LB 35.1 can be automated using a variety of innovative assistance systems, increasing efficiency as certain work steps are completely taken over by the machine’s control system. This includes the drilling assistant to automate the concreting process during continuous flight auger drilling, slack rope monitoring to prevent undesired loosening of the rope with the help of the winch control and automatic leader alignment to align the leader to the previously set inclination angle.
The new overload protection for the Kelly winch ensures the locked Kelly bar automatically stops the crowd winch if the maximum permissible load of the Kelly winch is exceeded. The rope length measurement of the auxiliary winch measures the length of the unwound rope, which is helpful when inserting reinforcement cages, for example.
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Locking of the Kelly bar’s telescopic sections is made significantly easier due to the Kelly visualization system in the LB 35.1. Thanks to the real time display of the Kelly bar’s locking recesses on the cab monitor, the operator is informed about the actual distance to the next locking recess. As well, colour indications inform when the bar can be locked, and false positioning of the Kelly bar during the shake-off process is indicated through a warning signal.
In the drill rig’s new cab, Liebherr focused on ergonomics and operating comfort. This is achieved with an orthopedic operator’s seat, individually adjustable monitors and a cool box for food. The new refuelling position of the machine is easily accessible from the crawlers, also increases convenience on the jobsite.
