gear

Table of Contents

Introduction References & Edit History Related Topics

Images & Videos

Study how a series of gears in a waterwheel translates a stream's energy to a millstone

Discover

Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

All 119 References in “We Didn’t Start the Fire,” Explained

NBA Lakers Celtics Finals Kevin Garnett shooting.

10 Great Sports Rivalries

Statue of Nostradamus

Nostradamus and His Prophecies

African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

Timeline of the American Civil Rights Movement

Flags of the countries of the world (flagpoles).

How Many Countries Are There in the World?

Candles Burning On Table In Church

What Is the Most Widely Practiced Religion in the World?

green digital binary symbols

What Comes After Terabyte?

gear: Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Photos and Videos

Study how a series of gears in a waterwheel translates a stream's energy to a millstone

See All Videos and Images →

Topics

hypoid gear differential gear rack and pinion bevel gear planetary gear worm gear gear wheel spur gear sun-and-planet gear pinion Harmonic Drive transmission ratchet cam Geneva mechanism Rolamite crank particle accelerator clock robot