With just one push button on each handle, the animax can be simultaneously engaged in width and height almost steplessly according to the respective body dimensions when setting up the device. The switching mechanism has two cylindrical iglidur ® bearings one behind the other in two hollow shafts. In turn, the inner hollow shaft is mounted in each bearing without the risk of edges. To facilitate the turning of the link, the tolerance of the inner guide sleeve was set further into the negative. This makes it necessary to absorb the torque generated by the lever at another point. This is done in the plain bearings of the component "Bridge". On the test rig, bearings with a steel jacket and PTFE coating did not withstand the load trade show. By testing various bearing bushes, the igus® Z-bearing proved to be the best solution. The frame is a portal frame in which a total of four tubes are telescoped. An extruded aluminium profile was produced for this purpose, into each of which a plain bearing is pressed. Thanks to the thin-walled igus® foil plain bearings, it was possible to design the profiles themselves with thinner walls. This saved weight and costs. The same foil bushings are used in the pull-out mechanism of the lever. The entire lever mechanism was designed with igus® plastic plain bearings at all pivot points. This enables precise, solid and yet effective operation. Each device uses 22 cylindrical and 9 flanged bushes, as well as a thrust washer. During the endurance test by the BerlinCert testing and certification centre, the device withstood the load without any problems right from the start.