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Bonfiglioli's 300M Series is an outstanding solution for all heavy-duty applications where compactness is not an option. Thanks to its modular design, the 300M Series can be customized to match an extremely wide range of applications. Bonfiglioli's expertise in planetary technology ensures high-quality product design and manufacturing procedures. The 300 Series operates without unwanted downtime even in the harshest environments. This planetary gearbox achieves top-class flexibility thanks to several outputs, as well as input configurations available for all 20 sizes. The 300M Series can be completed with a wide range of electric motors entirely manufactured by Bonfiglioli. Asynchronous motors (BN-BE-BX/M-ME-MX) can be coupled with 300M Series gearboxes, providing our customers a complete solution.


  • Key benefits

    - High torque density
    - Extreme speed reduction and high output torque
    - Low maintenance cost
    - Extremely customizable
    - High customization level
    - Flexibility
    - ATEX per explosive atmosphere 2G/2D
  • 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...1,286,700 Nm (11,063 … 11,388,254 in-lb)
  • Gear ratios

    3.4 ... 2,916
  • Certifications

    Certificate of compliance
    Inspection certificate
  • Brake options

    Negative multi-disk brake
  • Output

    Foot or Flange mounted
    Splined shaft (solid, heavy duty, hollow, hollow with axial bloackage device)
    Solid keyed shaft (solid, heavy duty, stirrer/mixer version)
    Hollow shaft with double keyway or shrink disk
  • Motors

    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
    Anti-condensate heaters

Download technical documentation

Register now to download the following documents
  • Product Catalogue-300 Industrial series Modular planetary gearboxes Power Series
  • Product Catalogue-300M series Modular planetary gearboxes IE2-IE3
  • Product Catalogue-300M series Modular planetary gearboxes_NEMA
  • User Manual-300-300M series Installation Operation and Maintenance Manual

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