+A **gear** is a rotating [Machine Part](/wiki/machine_part) with cut teeth designed to mesh with another toothed component, precisely transmitting [Torque](/wiki/torque) and motion. These fundamental elements are crucial in countless mechanisms, altering speed, direction, or mechanical force.
+## See also
+- [Sprocket](/wiki/sprocket)
+- [Gear Train](/wiki/gear_train)
+- [Mechanical Advantage](/wiki/mechanical_advantage)