3/H Series

Torque Range

Combined Planetary/Helical Bevel Heavy Duty Gear Units

The Bonfiglioli 3/H Series combines the high torque density of planetary gear units with the robustness and high-speed operation of the helical bevel heavy-duty products. This configuration can provide great power transmission in a very compact space, thanks to its angular layout. The 3/H Series can also come with a set of features such as hydraulic couplings or cooling circuits, adapted according to customers' needs..


Key Benefits

  • Extremely high transmissible torque and power
  • Suitable for all heavy-duty applications
  • High shock resistance
  • Reliability
  • Easy maintenance
  • High customization level 


Main Options

  • Auxiliary thermal devices
  • Forced Lubrication
  • Backstop devices
  • Torque arm
  • Base plates
  • Fluid couplings
  • Shoe brakes

*Furthermore, special, complete and custom Power pack solutions are available as per customer needs.


Torque Range

135,000 ...1,750,000 Nm


Gear Ratios

89.1... 1,070



  • Certificate of compliance
  • Inspection certificate



  • Solid cylindrical shaft
  • Solid shaft with keyway
  • Solid shaft with supporting feet
  • Solid shaft with keyway and supporting feet
  • Hollow shaft with shrink disc
  • Hollow shaft with keyway



Input with solid shaft
Input with e-motor coupling:

  •  M, ME, MX [compact asynchronous]
  • BN, BE, BX [IEC asynchronous]
  • BSR [IEC reluctance]
  • BS [IEC single phase]


Motor Options

  • Thermistors and thermostat sensors
  • Independent forced cooling
  • Incremental, sin/cos absolute single/multi-turn encoders
  • Tropicalization
  • Anti-condensation heaters
  • Backstop



Highest transmissible power in Bonfiglioli Portfolio

Designed to ensure the longest service intervals

Modular design

Wide range of available options

Several available cooling systems

Easy integration with base plates


Type File Size
Catalogue   S/H Combined Gearboxes   1.28 Mb   View   Download
Brochure   Heavy Industry Solutions   564.19 Kb   View   Download
Catalogue   Planetary gearboxes - 300M Industrial Series   81.37 Mb   View   Download
Brochure   Planetary Drive 300M Series   77.31 Kb   View   Download

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