In essence, gears are just circles with enamel connecting them. A gear transmits a circular movement among two different shafts by rotating and meshing with A different gear on another shaft. Gears appear in many different styles and sizes, including spur gear, helical gear, bevel gear, and worm gear. https://gearbox31852.bloguetechno.com/not-known-factual-statements-about-gearbox-68917076