SINUMERIK 840D sl successful in a racing sidecar

Full Throttle for High-Tech Wheel Hubs

When Otto Haller goes out onto the racetrack with the racing sidecar he built himself, he and his passenger must be able to rely totally on the engineering of this racing bike. This is why he builds his bikes himself. Manufacturing expert Helmut Kottmaier supplies him with key components such as wheel hubs and gearwheels of the highest quality, which are programmed directly on Sinumerik-controlled five-axis milling and turning machines.


Many details contribute to Haller’s sidecars usually being among the winners despite their lower power. These include the rigid chassis design, connection of the steering, integration of the engine, Cardan shaft, and bearing seats in addition to the wheel hubs and various gear parts. Haller has all of the many components produced in the highest quality and tunes them perfectly to each other. As a result, his sidecars more than make up for time lost on the straights by being faster in the bends.

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