The HH SERIES represents the pinnacle of our power transmission technology, engineered for extreme torque applications in the heaviest industrial sectors. Specifically designed for high-power rolling mills and heavy-duty industrial drives, the HH model features Hirth-serrated flanges to ensure maximum safety and zero-slip power transmission under massive loads. When standard bolted connections reach their physical limits, the HH Series provides the ultimate robust solution for continuous, high-torque operations.