"We have had the best experience in this field with the plain bearings," says Reiner Irsigler. "They withstand the enormous surface pressure continuously. And what's more, its lubrication-free property has proven itself in harsh everyday conditions. The soil gets stuck continuously on the lubricated machine elements. It penetrates gradually into the bushings and cause friction and can eventually lead to failure. “
In the area where the spade plunges into the earth, every conceivable abrasive loads also occur. The topics humidity and wide temperature range are also a factor to consider "As part of the new construction of the train station in the Stuttgarter Schlosspark in the winter of 2011/2012 there was a very tight time frame for the translplantation of the trees. Furthermore, temperatures lay in the lowest minus range," relates Roland Schlesag from experience. "The used large machines had no failures whatsoever. " The tribologically optimised plain bearings coped with every edge load easily, when the spade, for example, encountered stones in the way.