Involute gear

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Notion

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Science and technology

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What Wikipedia says

The involute gear profile is the most commonly used system for gearing today, with cycloid gearing still used for some specialties such as clocks. In an involute gear, the profiles of the teeth are involutes of a circle.

Excerpt from the Wikipedia article “Involute gear”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Claudio Rocchini, CC BY 2.5, via Wikimedia Commons.