Tunnel construction
In tunnel construction, every revolution counts. High forces act in confined spaces underground. Rollstar gearboxes ensure that tunnel boring machines operate reliably – worldwide.
In use underground
Increasing urbanization places high demands on infrastructure. Underground solutions are gaining in importance. Tunnel boring machines perform precision work under extreme conditions – around the clock.
Challenge
High torques, fluctuating loads, and challenging environments characterize tunnel construction. All components must function reliably over the long term. Downtime is costly and often critical to the project's progress.
Solution with Rollstar
Rollstar supplies gearboxes for tunnel boring machines that are precisely designed to meet these requirements. Whether as a central drive or in combination as a peripheral drive – the systems transmit forces reliably and operate stably in continuous operation.
The gearboxes cover a torque range from 1,500 Nm to 6.5 million Nm and can be integrated into different machine concepts.
Technical design
The gearboxes cover a torque range from 1,500 Nm to 6.5 million Nm and can be integrated into different machine concepts.
Planetary gearboxes can be combined with hydraulic motors from Rollstar or with motors from various manufacturers, including Rexroth, Hägglunds or Kawasaki.
Solutions up to 350 kW are available for use with electric motors. The gearboxes are designed for high weights and large moments of inertia and are equipped with water cooling.
Depending on the application, switchable gearbox versions are also possible to cover different torque and speed ranges.
Advantages
Torque range up to 6.5 million Nm
Use as a central or peripheral drive
Combination with various engines possible
Water cooling for stable operating temperature
Designed for high loads and continuous operation
Typical applications
Utility Tunneling
Traffic Tunneling
Raise Boring Rigs
Offshore drilling rigs
Cutting wheel drive
Agitator drive
Erector drive
screw conveyor drive
Shredder drive
