3/A - Combined Planetary/Helical Bevel Gearmotors & Units

Torque Range

Combined Planetary/Helical Bevel Gearmotors & Units

The Bonfiglioli 3/A Series combines the high torque density of planetary gear units with the robustness and high speed of helical bevel products. This configuration provides great power transmission in a very compact space, thanks also to its angular layout. The 3/A Series is available for the lower range of the 300M Series and represents a smart path to medium-duty power transmission for the industrial market. The 3/A Series can be completed by selecting from of a wide range of electric motors entirely manufactured by Bonfiglioli. Asynchronous motors both IEC and compact (BN-BE-BX/M-ME-MX) and reluctance motors (BSR) can be coupled with the 3/A Series. With its broad e-motor portfolio, Bonfiglioli can always provide customers an outstandingly balanced solution in terms of efficiency, dynamics and cost-effectiveness.

Key Benefits

  • Cost effective solution for high torque continuous duty application
  • High shock resistance
  • High transmissible power 
  • Compact Layout
  • High mounting flexibility
  • High performance gearmotor solution

Main Options

  • In line/right angle version
  • Independent cooling unit
  • Patented integrated cooling solution
  • Taconite seals
  • ATEX certification for explosive environments

Torque Range

1,250 ... 15,680 Nm

Gear ratios

18.7 ... 731


  • Certificate of compliance
  • Inspection certificate
  • ATEX


  • Foot or flange mounted
  • Splined shaft (male, heavy duty, hollow, hollow with axial blockage device)
  • Solid keyed shaft (male, heavy duty, stirrer/mixer version)
  • Hollow shaft with double key way or shrink disk


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


Robust design

High Efficiency

Modular design

Compact motor input

Atex- gearbox for explosive environments 2G/2D

Authorized Distributor For: