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Worm gearboxes

Kumera Helical Worm Gearbox

Kumera Helical Gearbox, Covera

Kumera Helical Worm Gearbox

Kumera Worm Gearbox, Covera

The Covera series is designed especially for non-continuous operation. Thanks to its concave – convex tooth profile it can take higher impacts and loads than conventional spur or worm gears. The reason why Covera tooth profile is stronger than a conventional worm tooth profile is that the surface pressure is spread onto a larger area causing a significant surface pressure drop.
The ratio scale from 5:1 to 3550:1 gives the user room to choose from. Whether you needed a worm gearbox to an anode jacking system, bark removal process, mixer or, for example, a feeder, you can find a suitable Covera gearbox from our product portfolio. Covera gearboxes are made to meet even the roughest requirements.

Technical data:

  • Nominal torque rating   1 - 35 kNm
  • Nominal power rating up to 175 kW
  • Gear ratios from 5:1 to 3550:1  (special ratios on request)
  • Shaft center distances from 63 mm to 400 mm

Covera-series is perfect choice for:

  • Wood handling
  • Waste water and chemical industry
  • Mining and mineral industry
  • Aluminium manufacturing


  • Bark removers
  • Feeders
  • Mixers
  • Waste water handling
  • Conveyors
  • Cranes
  • Rollers
  • Escalators
  • Anode jacking systems


  • High load carrying capacity
  • Large ratio scale
  • Several gearbox types to choose from
  • Cast iron housing
  • Several mounting positions

Gearbox assembly

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