Model

Bonfiglioli 313 (Heavy-Duty Planetary Gearbox, 300 Series)

Application

3–4.5 m³ twin-shaft concrete mixers, heavy-duty construction machinery

Continuous Output Torque

Up to 45,000 Nm

Shock Load Torque

Up to 90,000 Nm (1.8× overload capacity)

Overload Factor

150% intermittent overload (optimized for mixer shock loads)

Max. Input Speed

1,500 rpm (IEC electric motor) / 2,000 rpm (hydraulic motor)

Reduction Ratio Range

31.5:1 – 125:1 (standard); custom ratios available

Output Speed Range

12 – 48 rpm (optimized for concrete mixing)

Mechanical Efficiency

≥ 96%

Rated Service Life

≥ 20,000 hours (under normal operating conditions)

Bearing Life (L10)

≥ 100,000 hours (heavy-duty tapered roller bearings)

Sealing Class

IP65 (multi-layer labyrinth + Taconite seals, dust/water/concrete resistant)

Mounting Type

Flange / hollow shaft (shrink disk / keyway)

Motor Compatibility

IEC electric motors, hydraulic motors

Noise Level

≤ 75 dB(A) at rated load

Max. Oil Temperature

90°C (continuous operation)

Lubrication

Oil bath (standard); forced lubrication optional for high-duty cycles

Oil Change Interval

5,000 hours (normal conditions) / 2,500 hours (severe environments)

Duty Cycle

Suitable for 100% continuous operation

Weight

Approx. 380–420 kg (varies by ratio and mounting option)