A ring gear is a crucial component in various mechanical systems, particularly in gearboxes and differential assemblies. It is a large, circular gear that typically surrounds a smaller gear, known as the pinion gear. The ring gear's teeth mesh with the pinion's teeth, allowing for the transfer of rotational motion and torque between the two gears. In automotive applications, the ring gear is often found in the differential, which helps distribute power to the wheels. This allows vehicles to turn smoothly, especially during cornering. The design and material of the ring gear are essential for durability and performance in demanding conditions.