HDO Series Helical Bevel Heavy Duty Gear Units

Bonfiglioli’s HDO Series is robust & reliable with a long operating life and provides a heavy duty solution for your application. HDO’s are perfect for the harshest environments, coupled with low maintenance & long time service intervals.


Torque: 8,900 Nm – 209,000 Nm
Ratios: 5.6 – 490
Output: Single/double-sided solid input shaft (metric or inch dims)

Keyed hollow shaft

Shrink disc

Key benefits

  • Highly transmissible power
  • Robustness
  • Mounting flexibility
  • Reliability
  • Usable in explosive environments