In open-cast mines, the first material mining step is handled by bucket wheel excavators of different sizes and with different power ratings. With their huge dimensions, they are bigger than any other kind of machine anywhere. A bucket wheel excavator needs drives on the bucket wheel itself, on the conveyor belts, on the slewing gear, on the crawlers, and at numerous subordinated points.

The Siemens product portfolio also includes gear units for slewing gear drives (FLENDER planetary gear unit with lantern gear drive) and FLENDER gear units for traveling gears in worm planetary gear unit, gear unit, CAVEX® worm gear unit and MOTOX®-N geared motor versions.

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