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Bonfiglioli 309 Series Planetary Gear Reducer

The Bonfiglioli 309 series is a model in its 300M series of industrial planetary gear reducers, which are known for their high torque density and ability to withstand harsh operating conditions involving heavy loads and high impacts.

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Bonfiglioli 309 Series Planetary Gear Reducer

Technical Specifications

Bonfiglioli 309 Series Planetary Gear Reducer – Technical Specifications

(Typical parameters for concrete mixer application, e.g., 309R2 / 309L3)

Parameter

Metric Value

Imperial Value (if applicable)

Model Series

309 (300M Series)

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Max. Output Torque

16,000 Nm

141,600 lb-in

Nominal Output Torque

11,300–12,800 Nm

100,000–113,300 lb-in

Speed Ratio Range

28 / 32.6 (standard for mixer)

-

Max. Input Speed

2,500 rpm

-

Rated Input Power

30–45 kW

40–60 hp

Transmission Efficiency

96–98%

-

Thermal Capacity

~12–20 kW

~16–27 hp


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Mechanical & Installation Features

Technical Specifications

  • Design Type: Modular planetary gear unit, right-angle (R-series) / in-line (L-series) configuration
  • Output Interface: Flange-mounted (for mixer main shaft connection), compatible with Sicoma MSO/MAO series mixers
  • Input Interface: IEC/NEMA motor adapter or solid input shaft (for hydraulic motor connection)
  • Output Shaft Options: Solid keyed shaft, splined shaft, or hollow shaft with shrink disc
  • Weight (Typical): ~130–150 kg (287–331 lb)
  • Lubrication: Oil bath lubrication, standard oil volume ~12–15 L