Rosta custom lever arm extends lifespan of John Deere harvester

A German affiliate of John Deere benefited highly from working with Rosta.

When businesses around the world need the best elements for their equipment, they know the best name to trust is Rosta. This goes for Canadian companies, which benefit from these technological solutions through Rosta Inc. Even brand names as universally recognized as John Deere turn to the company for help. For example, the local John Deere affiliate in Bruchsal, Germany once benefited from a custom-made Rosta lever arm for a harvester.

Maintaining a solid reputation

An American corporation, Deere&Company manufactures John Deere equipment for numerous industries, including agriculture, construction, forestry, transportation, and lawn care. Product examples include machinery, diesel engines, lawn-care vehicles, and drivetrains used in heavy equipment, like axles, transmissions, and gearboxes. The company even offers financial assistance and other related services.

With more than 60,000 employees around the world, John Deere is a brand with a high international reputation. To maintain that solid reputation, Deere&Company needed a technically superior solution for the current vulcanized sockets pressed into the conventional swing arms of its harvesters. There were three vital conditions that this new solution had to meet: higher technical quality; cost reduction; and an exchange of elements without any redesign.

Rosta was clearly the best company with which to collaborate here. After considering the application, Rosta custom-designed a lever arm to meet the required specifications. This new arm incorporated two DR-S elements, and since the dimensions were equal to the existing component, even harvesters already sold could be easily retrofitted with the new custom solution.

The element was a torsional rubber spring with an operation range of plus or minus 30 degrees. Its inner square was held by the natural-rubber elastomers’ very high biasing force, and rubber and metal were not glued or vulcanized. There were no shear forces because of the torsion work taking place in the elastomers.

Deere&Company conducted a field test of the new level arm, which turned out to be a big success. “Thanks to the Rosta elements,” said Fritz Lauer, an engineer with John Deere in Bruchsal, “it was possible to improve quality and reduce costs without redesign.”

For more information, contact Rosta Inc.

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