Disc couplings are widely used in industrial machinery where reliable torque transmission, high-speed operation, and controlled misalignment are important. They are commonly found in pumps, compressors, motors, generators, turbines, and other rotating equipment. However, even a high-quality disc coupling can experience premature wear or failure when the connected shafts are not properly aligned. Shaft misalignment may occur during installation, after equipment movement, because of thermal expansion, foundation settlement, bearing wear, or changes in operating conditions. If it is not identified and corrected, misalignment can increase forces on the coupling and connected components, resulting in vibration, heat generation, fatigue, and unexpected machinery downtime. What Is Shaft Misalignment? Shaft misalignment occurs when the rotational centerlines of two connected shafts are not positioned correctly relative to each other. The main types include: Angular misalignment – the sh...