Planetary Gearbox

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There are three main components in a planetary gearbox: the sun gear, the planet gears and the ring gear. The gears are attached to the planet carrier that has teeth on the inside, which is the ring gear. Read Moreā€¦

Planetary Gearbox A planetary gearbox is a mechanism that lowers the speed or torque of a rotating input shaft by using a system of gears that revolves around a central gear.
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Leading Manufacturers

Bloomingdale, IL  |  630-980-1133

We offer premium speed reducers and motion control components. These deluxe parts are designed for a wide range of purposes and our engineers are willing to assist you with determining the best speed reducer.

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DieQua Corporation $$$

Freeport, NY  |  888-260-7466

Ondrives.US is committed to providing our customers with budget friendly speed reducers. With our vast inventory and capabilities, we are sure to have the exact product that you have been looking for. Customization is also available in order to fit your unique needs. We are ISO 9001:2015 certified. Visit our website today!

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Ondrives.Us Corp. $$$

Independence, IA  |  800-394-1139

Bloom Mfg. Inc specializes in Hydraulic Worm Gear Winches, Planetary Winches, Capstan Winches and Hydraulic Speed Reducers for the Marine, Construction, Waste, Utility, Industrial and Drilling Markets. The rugged construction and versatility of these Speed Reducers is ideal for stationary and mobile applications where slow speed, high torque, or variable speed and reversing are needed.

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Bloom Manufacturing Incorporated $$$

Charlotte, NC  |  888-999-9860

Does your application require speed reducers? We are a reliable manufacturer of sophisticated reducers. Our technology is easy to use and incredibly long lasting. These value-added products are engineered with distinguished features and the hardware is superior compared to the competition. Turn to us for dedicated service and high tolerance products. We will find a speed reducer that is perfect for you!

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Boston Gear $$$

West Sacramento, CA  |  916-372-5411

If you are looking for satisfactory cyclo reducers then we can assist you. Our premier solutions are affordable and energy efficient. Our dependable reducers are engineered for quality assurance and we are energetically creating the most cutting-edge products. You can trust us to supply you with the very best. Give us a call to learn more information!

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HECO Gear $$$
placeholder image DieQua Corporation Ondrives.Us Corp. Bloom Manufacturing Incorporated Boston Gear HECO Gear

Planetary gearboxes are able to produce many different reduction ratios because of the different planet gears that revolve around the sun gear. Planetary gearboxes are constructed of heavy duty metal such as steel and are able to handle large shock loads well. However, different planetary gearboxes are designed for specific speed, load and torque capacities. The predominant use for planetary gearboxes is in motor vehicles with automatic transmissions. Unlike manual transmission, in which the operator is responsible for switching gears, automobiles that have automatic transmissions use clutches, brake bands and planetary gearboxes to change the inputs and outputs, thereby adjusting the speeds accordingly.

An automatic transmission contains two complete planetary gearsets placed together into one component. Planetary gearboxes are also used in electric screwdrivers, sprinklers and applications that require large or multiple reductions from a compact mechanism. Planetary gearboxes are one of many variations of speed reducers and it is important that the right mechanism is used. Gearboxes may even be combined to produce the desired results and the most common kinds are helical gear reducers, worm gear reducers and inline gear reducers.

Planetary gearboxes gain their advantages through their design. The sun gear's central position allows the planet gears to rotate in the same direction and for the ring gear (the edge of the planet carrier) to turn the same way as the sun gear. In some arrangements the sun gear can simultaneously turn all the planets as they also engage the ring gear. Any of the three components may be the input, the output or held stationary, which results in many different reduction ratio possibilities.

In many planetary gearboxes one component is held stationary with another component serving as the input and the other as output. The reduction ratios for planetary gearboxes are dependent upon the number of teeth in the gears and what components are engaged. Generally, the load ability and torque increases with the number of planets in the system because the load is distributed among the gears and there is low energy waste; planetary gearboxes are highly efficient, averaging between 96 and 98%. The design is complex, however, and difficult to access for repairs or maintenance.

Planetary Gearbox Informational Video