300M Series

300M Series

Industrial Planetary Gearmotors & Units

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 (B-BE-BX/M-ME-MX) can be coupled with 300M Series gearboxes, providing our customers with a complete solution.


  • Key benefits

    High torque density
    Extreme speed reduction and high output torque
    Low maintenance cost
    Extremely customizable
    Usable in explosive environments

  • 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

  • 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 (male, heavy duty, hollow, hollow with axial blockage device)
    Solid keyed shaft (male, heavy duty, stirrer/mixer version)
    Hollow shaft with a double keyway or shrink disk

  • Motors

    Input with a 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