No one expected the wheel to be made so complicated

Gear is a mechanical part that has teeth that match together to transmit torque, which is responsible for receiving and transmitting force to other parts.

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Appeared in 27 BC, gears are considered one of the most useful inventions of humankind. It appears in every sophisticated structure like watches or bicycles, cars, .

Today, gears have been produced in the most sophisticated and precise way by machines. The video below will help us understand the complicated process of creating a gear.