A gear coupling is a type of flexible coupling that connects two shafts to transmit torque while accommodating angular, axial, and radial misalignment. It consists of two hubs with external gear teeth and a sleeve or cover with internal gear teeth that mesh with the hubs. The gear teeth allow for flexibility and efficient torque transmission, even under high loads. Gear couplings are commonly used in heavy-duty industrial applications such as steel mills, power plants, and mining equipment, where durability, high torque capacity, and reliability are essential.