Gears

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Gears come in various shapes and designs, including helical and spur gears. Helical gears have teeth that are cut at an angle to the gear's centerline, while spur gears have straight, non-angled teeth. The angled teeth on helical gears allow for smoother operation and reduced noise compared to spur gears, but they also produce a tilting force that can cause additional stress on the gear system.