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Planetary Gearboxes –EX

The EX Planetary Gearbox range is stocked in the UK for same-day or next-day delivery. They are also known by the term epicyclic gearboxes. The description 'planetary gearboxes' comes from the outer planetary gears ‘orbiting’ around the central sun gear. The ancient Greeks developed the idea of epicycles which later gave them the means to predict planetary orbital paths. 

High torque planetary gearboxes

We assemble planetary gearboxes capable of transmitting output torque of more than 15,000 Nm from UK component stock.


  • Planetary Gearbox
  • Ratios up to 10,000:1
  • High output torque up to 1,500,000 Nm
  • Input power up to 6,500 kW

They are particularly suited to high torque / low speed applications where shock loads are anticipated. The gear design leads to only 2% efficiency losses per gear set. STM grind and de-burr all gears prior to assembly, therefore increasing efficiency and reducing maintenance requirements.

If you are looking for planetary geared motors, we can assemble these from stock. We stock a wide range of motors, including brake motors, as a result planetary geared motors can be supplied from stock for same-day or next day delivery.

Epicyclic gearbox, planetary reducers and also planetary geared motors from stock, same day delivery available. 

Essential data:

  • Gear type: Planetary
  • Efficiency: 90% – 98%
  • Ratios: 3.7 – 10,000 +
  • Max torque: 1,500,000Nm

If you are looking for planetary gearboxes, get in touch today to see what STM UK can do for you!


For further information including Catalogues, Installation Manuals, Parts Lists or 2D/3D drawings please follow the links below:

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Planetary Gearboxes

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