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Girth Gear Drives

Kumera Active Drive

Kumera Active Drive™ Girth Gear

Kumera Active Drive™ Girth Gear ensures optimal load distribution on girth gear teeth throughout the years of operation without a need for high accuracy alignment. This compact solution utilizes the full load capacity of the valuable girth ring while providing maximum usability and serviceability with minimum space requirements.
Kumera Active Drive™ independently optimizes the tooth contact by constantly modifying the alignment of the drive unit. This enables girth gear load ratings that are unachievable for conventional drives.
The mounting procedure takes less time than ever before while the foot can be directly cast to the base concrete without separate steel structures for adjustment. Kumera Active Drive™ will correct the alignment of the pinion and backlash can be adjusted effortlessly by rotating a single screw.

Technical data:

  • Nominal torque rating   100 - 360 kNm
  • Nominal power rating up to 2000 kW
  • Ratios from 5:1 to 250:1
  • Weight from 2000 kg to 6000 kg (includes pinion, speed reducer and base steel structure)

Kumera Active Drive™ Girth Gear is perfect choice for:

  • Pulp and Paper Industry
  • Mining and Mineral Industry
  • Waste Processing


  • Kilns
  • Steam dryers
  • Drum pulpers
  • Debarking drums
  • Fiber drums
  • Mills
  • Panama wheels

Kumera Active Drive™ Girth Gear can be equipped with:

  • Water-cooled lubrication unit
  • Heating element
  • Brake (drum or disk)
  • Auxiliary drive with backstop or manual clutch
  • Remote condition monitoring: Kumera Guard Gear 300.



  • High efficiency – Minimizing power loss and saving energy
  • Modular structure – The ability of adding additional equipment and variety of mounting arrangements
  • 20 gearbox sizes and wide range of ratios – Guarantees optimal gearbox size
  • Flexible product structure - Easy to customize for the customer needs
  • Gearbox configuration at power-plaza.com – Serving engineers worldwide and allows downloading the 3D-models, dimensional drawings and technical specifications 24 / 7

Kumera Active Drive

After Sales Services

  • Start-up and installation services
  • Maintenance services
  • Regular inspection visits
  • Maintenance consulting services
  • Original spare parts
  • 24/7 on-call service
Kumera Corporation, Kumerankatu 2 FI-11100 Riihimäki, Finland Tel. +358 20 7554 200[email protected] Legal Notice / Privacy / Code of Conduct