What Makes Planetary Gear Boxes So Amazing

It’s amazing to think that planetary gears, also known as epicyclic gears, were invented by the Greeks more than 2,000 years ago. As the name implies, a central gear, called the sun gear, engages a series of planetary gears that orbit the sun. This whole assembly is then surrounded by a ring gear (the rest of the heavens?). All of the gear types can be controlled separately.

In this 3D Printer Academy video, they print a set of planetary gears and explore what makes the design and application of these gears so impressive and useful.


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