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Planetary Gears

A reliable source for Planetary Gears information and leading Planetary Gears Companies & Manufacturers.

Planetary gears are crucial in complex automotive transmissions, drive trains and other applications where complex gear ratios are required for smooth torque transmission. These complex and drastic gear ratios are possible since planetary gears have the ability to produce different gear ratios depending on which gear is used as the input, which gear is the output and which gear is stationary. Read More…

Planetary Gears Planetary gears, or epicyclic gears, consist of three or more outer gears, referred to as planet gears, which revolve around a central gear, also known as a sun gear. The allusions to the solar system refer to the design of the planetary gear; all of the gears in the planet gear are in one plane and are grouped around each other much like the planets surround the sun.
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Leading Manufacturers

Joliet, IL  |  800-876-7216

Omni G & M Corporation is a leading gear fabricator specializing in precision machined and custom solutions in a variety of sizes and types. Please check out Omni G & M’s website or call a friendly personnel member today!

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Omni Gear & Machine Corporation $$$

East Walpole, MA  |  800-491-1073

Gears are what we do best, and we are experts in our field. We have three generations of experience backing our company, and we use all of it to benefit you in any way possible.

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Commercial Gear & Sprocket Company, Inc. $$$

Syracuse, NY  |  315-488-0100

Gear Motions is a leading gear manufacturer specializing in supplying custom cut and ground gears. Our wide range of precision gear manufacturing capabilities and services deliver quality gears to meet almost any application.

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Gear Motions, Inc. $$$

King of Prussia, PA  |  800-766-5120

A gear manufacturer with 100+ years of experience producing, repairing and rebuilding gear drives, helical gears, planetary gears, spiral and straight bevel gears, spur gears and power transmission solutions used by cement, mining, paper, power generation and other industries. Coast-to-coast service centers.

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Philadelphia Gear $$$

Eastlake, OH  |  440-946-4327

Federal Gear and Machine offers industrial gears, spur gears, helical gears, worm gears, internal gears, external and bevel gears. We are fully integrated to serve the industrial gear needs of companies throughout the United States and Canada with quality and reliability.

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Federal Gear and Machine $$$

Cleveland, OH  |  800-423-3169

Cleveland Gear Company has specialized in worm gear technology including industrial gears, helical gears, worm gears and precision gears since 1912. Applications include steel production, electric power generation, and material transport. Fulfilling your exact requirements is what has and continues to make Cleveland Gear one of the top manufacturers of gearing and enclosed gear drives.

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Cleveland Gear Company $$$
placeholder image Omni Gear & Machine Corporation Commercial Gear & Sprocket Company, Inc. Gear Motions, Inc. Philadelphia Gear Federal Gear and Machine Cleveland Gear Company

Planet gears are also used in industrial automation and motion control applications such as wind turbines, bicycles, helicopters, heavy machinery, electric motors and paper feeders. Some advantages of planetary gears include high power density, increased torque capability, pure torsional reactions and large reduction in small volumes. However, there are disadvantages to using planet wheels as well, which include design complexity, high bearing loads and inaccessibility. Planetary gears are often used in industries such as marine, automotive, mining, military, commercial, construction, chemical processing, aerospace and agricultural.

Large Spur Gear Planetary Gears - Omni Gear & Machine Corporation

Planetary gears typically come in sets of two or more that operate on or inside larger industrial gears; these are referred to as planetary gear systems. In a planetary gear system the exterior gears interlock with the inward-facing teeth of a larger internal gear, increasing the output speed of the large outer gear through rotational torque applied to the internal sun gear. The four main components that make up these planetary gear sets are the sun gear, the ring gear, the planet pinions and the planet carrier.

The sun gear is the center of the planetary gear system. The ring gear, or internal gear, is named due to both its shape and its internal teeth and connects the epicyclic gear set to an output shaft. The planetary pinions are gears with a small number of teeth designed to mesh with a larger wheel, which is the ring gear. Engaged simultaneously by the sun gear, each of the planetary gears applies torque to the ring gear, which in turn supplies torque to the output shaft.

The planetary pinions are attached to a rotating plate, which is the planet carrier. In order for the planetary gear set to function, either the sun gear, planet carrier or ring gear must be held stationary. While one is held stationary, one of the remaining two components serves as the input and provides power to the system, while the other serves as the output and receives power from the system. The ratio of input rotation to output rotations depends upon two key factors: the number of teeth in each gear and which component is held stationary.

Planetary Gears Informational Video

 

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