Gear - Wikipedia
https://en.wikipedia.org/wiki/Gear
OverviewHistoryEtymologyComparison with drive mechanismsTypesNomenclatureBacklashShifting of gearsA gear is a rotating circular machine part having cut teeth or, in the case of a cogwheel or gearwheel, inserted teeth (called cogs), which mesh with another (compatible) toothed part to transmit (convert) torque and speed. The basic principle behind the operation of gears is analogous to the basic principle of levers. A gear may also be known informally as a cog. Geared devices can ch…
DA: 99 PA: 61 MOZ Rank: 6