Producer
thyssenkrupp rothe erde
World-leading maker of large-diameter slewing bearings and seamless rolled rings for cranes, wind turbines, mining and tunneling.
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Slewing bearings (large-diameter)
Seamless rolled rings
Bearing components & raceways
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Did you know2024
The company that makes the giant rotation bearing in a port crane also makes the giant bearings inside wind turbines. thyssenkrupp rothe erde is a dominant supplier of the slewing bearings that let a turbine nacelle yaw into the wind and its blades pitch — plus the main rotor bearing — and, through its seamless rolled rings, the tower and foundation flanges that hold the structure together. So the renewable-energy build-out and the world's crane fleet draw on the exact same multi-metre hardened-raceway metallurgy from the same maker. A bottleneck in large-bearing capacity is therefore simultaneously a wind-energy constraint and a heavy-lifting/ports constraint — two transitions usually analyzed in complete isolation, joined at a single bearing supplier.
thyssenkrupp rothe erde ↗Concentration2024
Producing a slewing bearing more than three metres in diameter — with a continuous hardened raceway, true to bearing tolerances, that can carry combined axial, radial and moment loads for decades — is something only a handful of companies worldwide can do, and rothe erde leads them. The barrier is not design but the integrated chain of large-ring forging/rolling, induction hardening of a giant circular raceway, and ultra-precise machining. That makes large-diameter bearings a quiet single-point dependency under multiple heavy industries at once: offshore and onshore wind, ship-to-shore and crawler cranes, mining excavators, and tunnel boring machines all sit on the same scarce metallurgical capability.
thyssenkrupp rothe erde ↗