In a rack and pinion steering system, what converts the rotational motion of the steering wheel into linear motion?

In a rack and pinion steering system, the rack is the component that converts the rotational motion of the steering wheel into linear motion. When the driver turns the steering wheel, this rotational movement is transmitted down the steering column to the pinion gear. The pinion, which is a small gear, engages with the rack, a linear gear that runs horizontally in the steering mechanism. As the pinion rotates, it moves the rack side to side. This side-to-side motion of the rack directly transforms the circular motion of the steering wheel into the necessary linear motion to steer the vehicle's wheels. This essential function allows for precise control and handling of the vehicle while driving.