Reduced wear by converting the fastening units on the X-Roll® oil bearings in the temper rolling mill 3 at thyssenkrupp Rasselstein GmbH while simultaneously increasing safety at work.
Oil bearings in older installations are typically pulled on and off by turning a ring nut seated on the roll journal. Due to large dimensions und the resulting high frictional resistance, the ring nut is tightened by means of wire rope sling and shop crane. The reproducibility and the control of the pulling-on forces is difficult, the risk of accidents is high.
A conversion to a hydraulic fastening system – as it is standard with modern oil bearings – is obvious, but often fails when it comes to the available assembly space, the prohibition of changing the existing backup roll geometry or an insufficient budget.