Rigid coupling is a mechanical device used to connect two shafts together, allowing them to rotate in unison. It is designed to transmit torque and rotational motion without any flexibility, ensuring precise alignment between the connected shafts. This type of coupling is commonly used in applications where high accuracy and stability are required, such as in motors and gearboxes. These couplings are typically made from materials like steel or aluminum, providing strength and durability. Rigid couplings come in various designs, including clamp, sleeve, and flanged types, each suited for different installation and operational needs. Proper alignment is crucial, as misalignment can lead to increased wear and potential failure.