Bonfiglioli 305 Planetary Gearbox (300 & 300M Series)
The Bonfiglioli 305 (featured model: 305 R2 1/25 HD) represents the industrial benchmark in planetary power transmission from Bonfiglioli's world-renowned 300 & 300M Series. Engineered for extreme duty, high shock loads, and maximum torque density in compact spaces, Bonfiglioli planetary speed reducers cover nominal output torques from 1,250 Nm up to 1,286,000 Nm across 20 standard frame sizes. Manufactured with heavy nodular cast iron housings, planet carriers with dual spherical roller support, and precision ground sun and planet gears, these units are available in coaxial inline (L1 to L4 stage) and right-angle bevel-planetary (R1 to R4 stage) configurations. With modular output shaft options (splined hollow shaft, solid keyed shaft, and shrink disc), Bonfiglioli 300/300M drives provide 100% direct 1-to-1 mechanical replacement for Brevini ED/ET Series, SEW P Series, and Flender PLANUREX planetary units across heavy mining feeders, winches, sugar mills, cement kilns, and mobile construction machinery.
Technical Specifications
| Featured Model | 305 R2 1/25 HD (Size 305, 2-Stage Right-Angle Bevel-Planetary, Ratio 1:25, Heavy Duty) |
|---|---|
| Brand / Manufacturer | Bonfiglioli Riduttori S.p.A. (Italy) |
| Product Series | 300 Series (Standard Industrial) & 300M Series (Enhanced Heavy Industry) |
| Frame Sizes Covered | 300, 301, 303, 305, 306, 307, 309, 310M, 311M, 313M, 315M, 318M, 321M, 325M (20 Sizes) |
| Nominal Output Torque | 1,250 Nm to 1,286,000 Nm (Peak Transmissible Torque up to 2,500,000 Nm) |
| Gear Ratio Range | i = 3.4 to 5,200 (Coaxial L1-L4 & Right-Angle Bevel R1-R4) |
| Input Options | IEC Motor Flange Adapter, NEMA Adapter, Male Solid Input Shaft, Hydraulic Motor Adapter |
| Output Executions | Female Splined Shaft (DIN 5480), Solid Keyed Shaft, Hollow Shaft with Shrink Disc, Flange Shaft |
Documentation & Resources
Bonfiglioli 300 & 300M Series Modular Architecture Matrix
Full modular layout guide for Bonfiglioli 300 and 300M planetary drives. Review torque ratings, planetary reduction stages, and output shaft executions:
| Gearbox Size & Design Class | Reduction Stages | Nominal Torque (Nm) | Standard Splined Shaft Bore | Target Industrial Drives |
|---|---|---|---|---|
| 300 / 301 / 303 / 305 (Light-Medium Duty) | L1, L2, L3 / R1, R2, R3 | 1,250 Nm - 5,500 Nm | DIN 5480 W40 / W50 | Mobile Winches, Agitators, Small Conveyors |
| 306 / 307 / 309 (Medium Industrial) | L1 to L4 / R1 to R4 | 8,000 Nm - 23,000 Nm | DIN 5480 W60 / W70 | Apron Feeders, Cranes, Mixers, Winch Drums |
| 310M / 311M / 313M (Heavy Duty) | L1 to L4 / R1 to R4 | 35,000 Nm - 85,000 Nm | DIN 5480 W80 / W90 / W100 | Mining Conveyors, Shredders, Sugar Mills |
| 315M / 318M / 321M / 325M (Extra Heavy Industrial) | L2 to L4 / R2 to R4 | 135,000 Nm - 1,286,000 Nm | DIN 5480 W120 / W150 / W180 | Cement Kilns, Bucket Wheel Excavators, Marine Thrusters |
Brevini ED & SEW P Series to Bonfiglioli Direct Replacement Guide
Bonfiglioli 300 and 300M planetary drives adhere strictly to international mounting bolt circles and output splines, making them 100% physically interchangeable with competing heavy industrial planetary reducers (Brevini ED/ET, SEW P Series, Dinamic Oil, Flender PLANUREX):
| Competitor Model (Brevini / SEW / Flender) | Torque Range | Bonfiglioli 1-to-1 Equivalent Model | Bonfiglioli Max Torque | Mechanical Mounting Compatibility Notes |
|---|---|---|---|---|
| Brevini ED 2040 / ET 2040 | 3,500 Nm - 4,500 Nm | Bonfiglioli 303 L2 / R2 100% Drop-In | 5,000 Nm | Identical mounting flange bolt circle, splined shaft DIN 5480, and motor adapter. |
| Brevini ED 2065 / SEW P002 | 6,000 Nm - 7,500 Nm | Bonfiglioli 305 L2 / R2 100% Drop-In | 8,500 Nm | Direct 1:1 replacement for winch and conveyor drive headstocks. |
| Brevini ED 2090 / SEW P012 | 12,000 Nm - 15,000 Nm | Bonfiglioli 307 L3 / R3 100% Drop-In | 18,000 Nm | Matches heavy apron feeder mounting pads and hydraulic motor interfaces. |
| Brevini ED 2150 / SEW P022 | 22,000 Nm - 25,000 Nm | Bonfiglioli 309 L3 / R3 100% Drop-In | 30,000 Nm | Direct drop-in replacement for heavy mixer drives and bucket excavators. |
| Brevini ED 2250 / SEW P042 | 40,000 Nm - 50,000 Nm | Bonfiglioli 310M L3 / R3 100% Drop-In | 60,000 Nm | Heavy nodular cast iron body. Fits standard shrink disc hollow shafts. |
| SEW P082 / Flender PLANUREX 3 | 120,000 Nm - 150,000 Nm | Bonfiglioli 315M L3 / R3 Heavy Duty | 170,000 Nm | Heavy duty crushing mill & kiln drive replacement with foot or flange mounting. |
Expert Selection & Retrofit Engineering Notes
When replacing worn Brevini ED/ET Series, SEW P Series, or Flender PLANUREX planetary gearboxes on heavy mining conveyors, winches, or agitators, switching to Bonfiglioli 300/300M units guarantees 100% exact physical mounting alignment, output shaft compatibility, and high overload thermal capacity without modifying foundation structures or drive couplings. Simply supply us with your existing planetary gearbox nameplate code (e.g., 305 R2 1/25 HD) or drawing, and our technical team will deliver a 100% compliant replacement specification and proposal.
Core Benchmark Model Standard Configurations
- 300 L1 1/3.5 IEC B5
- 301 L2 1/15 Solid Shaft
- 303 R2 1/20 Bevel Input
- 305 L2 1/16 Splined Shaft
- 305 R2 1/25 Heavy Duty
- 306 L3 1/80 Shrink Disc
- 307 L3 1/120 Solid Shaft
- 307 R3 1/150 Right Angle
- 309 L3 1/180 Hollow Shaft
- 309 R3 1/220 Hydraulic Input
- 310M L4 1/450 Heavy Duty
- 311M R4 1/600 Mining Drive
- 313M L3 1/140 Conveyor Drive
- 315M R3 1/180 Kiln Drive
- 318M L4 1/800 Sugar Mill Drive
- 321M L3 1/200 Marine Thruster
- 325M R4 1/1200 Extra Heavy
- Brevini ED 2040 Replacement
- Brevini ED 2090 Replacement
- SEW P012 Planetary Replacement
