Sometimes, the best way to move something is to drive a gear rack with a pinion. Rack and pinion gear set is designed to convert rotational motion into linear motion.
The circular gear (call the “pinion gear“) engages the teeth on a linear bar (called the “gear rack“). Rotational motion is applied to the stationary pinion gear, which causes the gear rack to move. Thus, the rotational movement of the pinion gear is transferred to the linear motion of the gear rack.
