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Planetary Gearboxes –EX

The EX Planetary Gearbox range is stocked in the UK for same-day or next-day delivery. Planetary gearboxes are also known by the term epicyclic gearboxes. This 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 can assemble high torque planetary gearboxes capable of transmitting torque in excess of 15,000 Nm.


  • Planetary Gearbox
  • Ratios up to 10,000:1
  • Output torque up to 1,500,000 Nm
  • Input power up to 6500 kW

Planetary Gearboxes are particularly suited to high torque / low speed applications where shock loads are anticipated. The planetary gear design leads to only 2% efficiency losses per gear set. STM grind and de-burr all gears prior to assembly to increase efficiency and also reduce maintenance requirements.

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

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

Essential data:

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


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

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