Planetary gear systems are also known as epicyclic gear systems. Planetary gears are often used in an application where space and weight are a concern, but a large amount of speed reduction and torque are needed. Planetary gear systems are used in a variety of industries, including large earthmoving & construction equipment, turbine engines, and automatic transmissions.

Planetary gear systems are able to produce a lot of torque because the load is shared among multiple planet gears.

Shrewsbury Machine & Gear manufacturers meshed-planet, stepped-planet and multi-stage planetary gear systems.

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