The Trane CPL0186 Shaft Coupling 1.25" x 0.50" is a precision-engineered mechanical coupling designed to securely connect motor and pump shafts in HVAC equipment. It works by transmitting torque between two shafts while accommodating slight misalignment and vibration, ensuring smooth and reliable power transfer. https://www.partshnc.com/shaft-coupling125-x-12-5