Crowned teeth gear couplings feature specially shaped gear teeth with a slight convex curve, known as a crown, on both the internal and external gears. This design optimizes contact between the teeth, reducing wear and enhancing torque transmission efficiency while accommodating misalignments. The crowned teeth help distribute loads more evenly, minimizing stress concentrations and improving the coupling's overall durability. Crowned teeth gear couplings are commonly employed in applications where misalignment and high torque transmission are prevalent, providing reliable performance and extended service life.