Z-531163.04.DRGL

The Z-531163.04.DRGL is a high-precision triple ring bearing specifically engineered for the demanding environments of the paper industry, particularly within deflection-compensating rolls (such as Küsters or S-rolls). This specialized component integrates a spherical roller bearing as the outer assembly and a cylindrical roller bearing as the inner unit, providing an optimal balance between load distribution and misalignment compensation. With a massive 300mm bore, 780mm outside diameter, and a weight of approximately 629kg, it is built to handle extreme radial static capacities exceeding 11,000 kN. The inclusion of a robust solid brass cage ensures superior thermal stability and durability, even when operating at sustained temperatures up to 200°C in high-speed calender or press sections.

Beyond its impressive dimensions (300 x 780 x 200 mm), the Z-531163.04.DRGL stands out for its unique Küsters design and "triple ring" architecture, which facilitates the transmission of drive forces directly through the rotating intermediate ring. This configuration is essential for maintaining precision in paper thickness and quality, as it supports the stationary crosshead while allowing the roll sleeve to rotate seamlessly. Its open design and specialized ring material (typically GCr15SiMn) provide enhanced resistance to hoop stress and fatigue, making it a reliable interchange for premium brands like FAG or SKF. For mill operators looking to minimize downtime, this bearing offers the fracture toughness and load-carrying reliability required for heavy-duty industrial machinery.

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