
A coupling size chart serves as an essential technical reference for selecting suitable shaft couplings in various mechanical power transmission systems. It integrates standardized dimensional specifications and performance parameters to help technicians match couplings accurately with different shaft types and equipment operating demands. Proper size selection guided by the chart is critical to avoiding common mechanical issues such as shaft misalignment, abnormal vibration, power transmission loss and premature component wear. Whether for flexible or rigid couplings, the unified size criteria ensure stable assembly, reliable torque transmission and long-term operational safety of mechanical equipment. By following the systematic specifications in the size chart, users can streamline component matching procedures, improve installation accuracy, and maintain consistent working efficiency of industrial machinery across diverse application scenarios.