With its new KUSE six-row linear recirculating ball bearing and guideway assembly, Schaeffler has proved that significant technological advances in linear technology are still possible even for well-established products. KUSE X-life assemblies are highly accurate and run extremely quietly, enabling their use in measuring machines.
The infeed zones in linear recirculating ball bearing and guideway assemblies, i.e. the area in which the rolling elements are guided into the load-carrying element until the load is fully applied, are critical factors for life-limited components. These zones ensure that the load is gradually rather than abruptly applied to the rolling element. By improving the design of the infeed zone on the carriage saddle plates, Schaeffler has now succeeded in increasing the load ratings for six-row KUSE linear recirculating ball bearing and guideway assemblies by up to 44%, depending on the size and design. As a result, the rating life is three times higher than that of conventional designs. Due to the significant increase in performance, the redesigned KUSE series has been awarded the Schaeffler X-life quality mark.
Pulse amplitudes of up to 1 µm (peak-to-peak) for a single ball are not uncommon. For the new KUSE X-life guidance systems, the contour of the infeed zone has been optimised in such a way that the stroke pulsation is considerably reduced, particularly at higher loads. For example, at a load of 1.35 tonnes, the pulsation amplitude is less than 0.1 µm – a reduction of 83%.
Six-row linear recirculating ball bearing and guideway assemblies in X-life quality can now also be used in applications where vibration must be kept to a minimum and where very high accuracies are required, for example, in measuring machinery.
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