Bonfiglioli 311 Series Planetary Gear Reducer

The best replacement of Bonfiglioli 311 gearbox.

This Planetary Gearboxe is for Twin Shaft Concrete Mixers of 1to 2cbm.

 SNAKE

Bonfiglioli 311 Series Planetary Gear Reducer

Technical Specifications

Technical Data sheet (For Concrete Mixer Main Drive)

Item

Details

Product Model

311 / 311M

Product Type

Planetary gear reducer, heavy-duty industrial grade

Application

Main drive for twin-shaft forced concrete mixers (2–3 m³ capacity and above)

Mounting Type

Flange / foot mounting

Lubrication Method

Oil bath lubrication (with oil level inspection port)


Performance Parameters

Parameter

311 (Mobile Heavy-Duty)

311M (Industrial Heavy-Duty)

Unit

Rated Output Torque

35,000

58,300

Nm

Reduction Ratio Range

3.4 – 2916

3.4 – 2916

Max. Input Power

Up to 450

Up to 450

kW

Recommended Input Speed

1,450 – 1,800

1,450 – 1,800

rpm

Output Speed Range

10 – 30 (depends on ratio)

10 – 30 (depends on ratio)

rpm

Thermal Capacity Power

32.8 (typical configuration)

kW

Net Weight (Approx.)

280 – 300

300 – 320

kg


Inquiry or Consult
Logo.png

SNAKE Planetary Gearbox complies with EU standard

SNAKE produced gearbox by our own heat treatment furnace.All of our machines are from Germany to ensure the most tiny tolerance.

  • 中1
  • 中2
  • 中3
GET MORE INFORMATION

Mechanical Interface

Item

Specifications

Input Connection

IEC motor flange / solid shaft / hydraulic motor interface

Output Shaft Type

Solid keyed / solid splined / hollow splined

Output Shaft Standard

DIN 5482 (typical: A100×94 H109)

Fastening Bolts

High-strength grade 10.9 / 12.9


Material & Process

Component

Material & Treatment

Gear Set

20CrMnTi carburizing and quenching, hard tooth surface

Housing

High-strength cast iron / ductile iron

Bearing

Heavy-duty tapered roller bearing / spherical roller bearing

Seal

Labyrinth seal + oil seal, dust-proof and leak-proof


Operating Conditions

Item

Limits

Ambient Temperature

-20°C ~ +40°C

Lubricant Type

Industrial gear oil (ISO VG 220 / 320)

Altitude

≤ 1,000 m (derate above 1,000 m)

Protection Class

IP65 (customizable)


Typical Configuration Example

Item

Value

Full Model

311 R3 147 FZ N280TC B3

Input Speed

1,800 rpm

Input Power

36.5 kW (49 hp)

Reduction Ratio

146.3

Output Speed

12.3 rpm

Output Torque

25,770 Nm (227,900 lb·in)


055c51cd-f935-48ea-8950-180855e2b557

Bonfiglioli 311 (300 Series) Planetary Gearbox: Key Advantages

The Bonfiglioli 311 planetary gearbox (part of the 300 Series, Mobile/Heavy-Duty) is a high-performance drive solution optimized for severe-duty applications like twin-shaft concrete mixers, construction machinery, and heavy industrial equipment.

1. Exceptional Torque & Power Density

  • High Output Torque: Delivers up to 40,000 Nm of continuous torque, ideal for heavy-load mixing and high-shock applications
  • Superior Torque Density: Compact coaxial design provides maximum torque in a minimal footprint, enabling equipment downsizing without sacrificing performance.
  • Extreme Reduction Ratios: Offers wide ratio coverage for precise speed control and high torque multiplication.

2. Robustness & Durability for Harsh Environments

  • Heavy-Duty Construction: Features hardened gear surfaces, reinforced main bearings, and a rugged housing to withstand continuous shock loads and impacts.
  • High Shock Resistance: Engineered for operations where shock loads are frequent, minimizing downtime in demanding conditions.
  • Advanced Sealing: Equipped with high-quality seals (including Taconite seals) for dust, water, and contamination protection, suitable for outdoor/construction sites.
  • Low Backlash: Precision gear machining ensures minimal mechanical play, improving positioning accuracy and operational smoothness.

3. Compact & Space-Saving Design

  • Coaxial Layout: Inline input/output configuration reduces installation space compared to offset gearboxes.
  • Optimized Footprint: Compact form factor simplifies integration into mobile machinery and equipment with limited space.

4. Versatility & Customization

  • Flexible Mounting: Supports foot, flange, and hollow-shaft mounting (with shrink disk or keyway) for broad compatibility.
  • Multiple Output Shaft Options: Solid keyed, splined, and heavy-duty hollow shafts to match diverse application requirements.
  • Motor Compatibility: Works seamlessly with electric (IEC) and hydraulic motors, offering design flexibility.
  • Wide Accessory Range: Optional integrated multi-disc parking brake, quickdisconnect devices, and cooling systems for tailored solutions.

5. Low Maintenance & High Efficiency

  • Easy Serviceability: Designed for simplified oil changes and routine maintenance, reducing total ownership cost.
  • High Mechanical Efficiency: Precision planetary gear train minimizes energy loss, lowering operational costs and heat generation .
  • Long Service Life: Premium components and robust design extend operational life and reduce replacement frequency .

Online message

Please leave us a message according to your requirements.

tihuan
Submit

 SNAKE

Product certificate

 SNAKE

SNAKE MACHINERY

SNAKE provide comprehensive solution for your batching plant.Our products have attractive appearance, longer service life, high precision and customized service.

SNAKE MACHINERY is a high-end special batching plant parts manufacturing enterprise. We have nearly 20 years experience of R&D and service with over 25 patents. Our products are highly praised by customers because of good precision and long service life.

Leading Batching Plant Parts manufacturer
Over 15 techniques and 13 quality controller
Germany CNC machining equipment with high precision
Export to over 56 countries and welcomed
8 years repair rate within 1% and free spare parts service
EU CE and ISO 9001 certificate

 SNAKE

SNAKE Advantages

Professional Expertise

With many years of experience and rich project knowledge.

Customized Solutions

Tailored products and solutions based on customer needs.

Global Service Network

Timely technical support and after-sales service for customers worldwide.

YOU GOT QUESTIONS, WE GET THE ANSWERS YOU NEED

We commitment that we will try our best to solve all the questions for our customer. We welcome and valued your advice to us. We are not only your supplier but also your key of success and your partner of business.

 Contact us

Product parameters and related specifications

Feel free to contact us for more details

+86 13001717819
sales@batchingplantpart.com
8613001717819
No.33 Duandian West Road, Huaiyin District, Jinan, China

For better communication, please leave your contact number.

Do you have any question?

Submit

 SNAKE

SNAKE Related Application Areas

Over the past 20 years, SNAKE has expanded into multiple areas

providing global customers with comprehensive solutions of BatchingPlant Parts.

Twinshaft Mixer Parts

Twinshaft Mixer Parts

Mixer Truck Gearbox

Mixer Truck Gearbox

Screw Conveyor Parts

Screw Conveyor Parts

Belt Conveyor Parts

Belt Conveyor Parts

Silotop&Batcher Parts

Silotop&Batcher Parts