310 Series Inline Planetary Gearbox
Trusted Across Industries:
Industrial Conveyor & Hoist
Cement & Aggregates Plant
Port Crane & Lifting Equipment
Marine & Offshore
Construction Machinery
Agricultural Machinery
Paper & Steel Mill
Why Choose Our 310 Series Inline Planetary Gearbox? — Our 310 Series is verified against Bonfiglioli 310 OEM installation drawings — housing bolt pattern, output shaft geometry, motor flange pilot diameter, and oil plug positions are all confirmed before a cross-reference is issued. T2max ~40,000 N·m. Transmissible power up to 540 kW. Ratios 3.4:1 to 9,000:1. All seven standard Bonfiglioli 310 configurations covered — 310L1 through 310L4 (inline) and 310R2 through 310R4 (right-angle). Full output and input modularity. Integrated hydraulic, DC, and AC brake options. Profile-ground gears throughout. 100% factory acceptance test with every unit. Free 48-hour engineering cross-reference — send us the nameplate data.
310 Series Inline Planetary Gearbox — Product Overview
The 310 Series Inline Planetary Gearbox sits at frame size 17 of 20 in the Bonfiglioli 300 Series range — positioned between the 309 (T2max ~25,000 N·m) and the 311 (T2max ~55,000 N·m) — with a published T2max of 354,000 in·lbs (~40,000 N·m). This torque class is widely specified in medium-to-heavy industrial conveyor drives, crane travel and hoist units, mixer drives, and pump drives where the Bonfiglioli 310 is the existing OEM specification. Our 310 Series is the confirmed direct dimensional replacement for every standard Bonfiglioli 310 model: all four inline stage configurations (310L1 through 310L4) and all three right-angle configurations (310R2 through 310R3R4).
Every critical dimension of the 310 Series is verified against Bonfiglioli 310 OEM installation drawings before a cross-reference is confirmed to a customer. Housing bolt pattern, output shaft diameter, keyway width and depth (or spline specification), and motor flange pilot diameter are all confirmed — not estimated from published torque data. This dimensional verification process is what distinguishes our cross-reference service from generic "compatible" claims: you receive a dimensional drawing with the confirmed cross-reference, enabling your installation team to verify the fit before taking the original unit offline.
Beyond the Bonfiglioli 310, our 310 Series cross-reference database also covers equivalent inline planetary models from Brevini (ED / ET / EQ series in the ~40,000 N·m class), Dinamic Oil (RE series), Reggiana Riduttori (RR / RA series), Rossi (MR series), Rexroth (GFT series), and Zollern (ZHP series) in the same torque band. Submit the nameplate data for any of these brands, and we will return a confirmed 310 Series cross-reference within 48 hours.
310 Series OEM Cross-Reference — All Model Variants & Equivalent Brands
Our 310 Series Inline Planetary Gearbox provides confirmed dimensional replacement for all OEM models listed below. Housing interfaces, output shaft geometry, torque ratings, and motor flange standards are all verified against OEM installation drawings before confirmation.
① Bonfiglioli (Trasmission) — 310 Series: All Standard Model Numbers
The Bonfiglioli 310 is the primary OEM model our 310 Series is designed to replace. All seven standard ordering configurations are covered — inline (L) and right-angle (R) versions, single through four-stage reductions, and all standard output shaft suffix codes.
| Bonfiglioli Model | Version | Stages | T2max | Our Equivalent |
|---|---|---|---|---|
| 310L1 | Inline, 1-stage | 1 | ~40,000 N·m | 310-L1 |
| 310L2 | Inline, 2-stage | 2 | ~40,000 N·m | 310-L2 |
| 310L3 | Inline, 3-stage | 3 | ~40,000 N·m | 310-L3 |
| 310L4 | Inline, 4-stage | 4 | ~40,000 N·m | 310-L4 |
| 310R2 | Right-angle, 2-stage | 2 (bevel + planetary) | ~40,000 N·m | 310-R2 |
| 310R3 | Right-angle, 3-stage | 3 (bevel + 2 planetary) | ~40,000 N·m | 310-R3 |
| 310R4 | Right-angle, 4-stage | 4 (bevel + 3 planetary) | ~40,000 N·m | 310-R4 |
Standard Output Shaft Suffix Codes — All 310 Variants
| Bonfiglioli Suffix | Output Shaft Type | Mounting | Available in Our 310 Series |
|---|---|---|---|
| NHC / HC | Heavy-duty flanged output — keyed shaft | Flange | ✓ Yes |
| NHZ / HZ | Heavy-duty splined male shaft | Flange | ✓ Yes |
| NPC / PC | Foot base — keyed shaft | Foot | ✓ Yes |
| FZ / FZB | Hollow splined shaft | Flange | ✓ Yes |
| FP | Hollow shaft for shrink disc | Flange | ✓ Yes |
310 Series in Context — Bonfiglioli 300 Series Frame Size Ladder: The 310 is frame size 17 of 20 in the Bonfiglioli 300 Series (309 → 310 → 311). The adjacent sizes — 309 (T2max ~25,000 N·m) and 311 (T2max ~55,000 N·m) — are available from our range as the 309 Series and 311 Series, respectively. Always confirm the exact frame size number from the nameplate before ordering; 309, 310, and 311 housings are dimensionally distinct and cannot be interchanged. We confirm the correct series from the nameplate data within 48 hours.
② Brevini Riduttori (Dana) — Equivalent Models (~40,000 N·m Class)
The Brevini ED, ET, and EQ inline series in the 35,000–45,000 N·m torque band are confirmed cross-references for the 310 Series. The following models are covered:
| Brevini Model | Series | Rated Torque | Stages | Typical Application |
|---|---|---|---|---|
| ED2150 | ED Series | ~30,000 N·m | 2 stage | Industrial conveyor, agitator |
| ED2250 / ED2255 | ED Series | ~50,000 N·m | 2 stage | Mining conveyor, crane travel |
| ET3150 | ET Series | ~30,000 N·m | 3 stage | Hoist, drum winch |
| ET3250 / ET3255 | ET Series | ~50,000 N·m | 3 stage | Heavy industrial plant |
| EQ4150 | EQ Series | ~30,000 N·m | 4 stage | Conveyor with high ratio |
| EC3150 / EC4150 | EC Series | ~30,000 N·m | 3–4 stage | Conveyor with integrated brake |
③ Dinamic Oil — RE Series (~30,000–50,000 N·m Class)
Dinamic Oil RE series models in the 30,000–50,000 N·m torque band cross-reference to the 310 Series through confirmed dimensional analysis:
| Dinamic Oil Model | Rated Torque (N·m) | Typical Application |
|---|---|---|
| RE3000 | ~30,000 | Industrial conveyor, crane travel |
| RE3510 | ~35,000 | Mining conveyor, heavy hoist |
| RE4800 | ~48,000 | Large crane, port machinery |
④ Additional OEM Cross-References — Same Torque Class
Beyond the primary brand families above, the 310 Series covers the following OEM inline planetary models in the ~30,000–50,000 N·m range. Submit the model number, and we will confirm within 48 hours:
| OEM Brand | Series / Models | Torque Class | Typical Application |
|---|---|---|---|
| Reggiana Riduttori | RR / RA (30K–50K class) | 30,000 – 50,000 N·m | Industrial conveyor, marine |
| Bosch Rexroth | GFT36 / GFT50 Inline | 36,000 – 50,000 N·m | Hydraulic motor, industrial hoist |
| Rossi | MR2E / MR3E (30K–50K class) | 30,000 – 50,000 N·m | Italian industrial plant, conveyor |
| Zollern | ZHP3.20 / ZHP3.22 | ~35,000 – 50,000 N·m | Crane, heavy industrial |
| Antriebstechnik O&K | F / FA (30K–50K class) | 30,000 – 50,000 N·m | Construction and industrial drive |
| Fairfield Manufacturing | W Series (30K–50K class) | 30,000 – 50,000 N·m | Industrial and marine hoist |
Free 48-Hour OEM Cross-Reference Service: Send us the OEM brand, model number (e.g., Bonfiglioli 310L3 NHC, Brevini ED2250, or Dinamic Oil RE3510), gear ratio, and motor flange type from the gearbox nameplate. Our engineering team confirms the 310 Series equivalent with a dimensional drawing and delivery timeline within 48 hours — at no charge.
310 Series Inline Planetary Gearbox — Technical Specifications
Standard engineering parameters for the 310 Series, aligned with the Bonfiglioli 310 and equivalent OEM specifications. All parameters match or exceed the original OEM ratings.
| Parameter | Specification | Notes |
|---|---|---|
| T2max (Peak Torque) | ~40,000 N·m (354,000 in·lbs) | Matches Bonfiglioli 310 T2max specification |
| Transmissible Power | Up to 540 kW | Matches Bonfiglioli 300 Series power ceiling |
| Gear Ratio Range | 3.4:1 – 9,000:1 | 1 to 4 inline stages; right-angle 2–4 stages |
| Gear Unit Versions | Inline (L) / Right-angle (R) with spiral bevel first stage | Matching Bonfiglioli 310L and 310R configurations |
| Output Configurations | Flanged keyed shaft / Splined shaft / Foot keyed / Hollow splined / Hollow with shrink disc | All Bonfiglioli 310 suffix codes reproduced |
| Input Configurations | Flanged axial-piston motor / Orbit motor / IEC B5 / NEMA / Solid input shaft | Custom adaptor plates for non-standard motors |
| Brake Options | Hydraulic-released parking brake / DC electric brake / AC electric brake | Rated to hold full nominal output torque at any ratio |
| Transmission Efficiency | 96% – 98% per stage | Rolling-contact planetary; consistent with OEM spec |
| Gear Material | 20CrMnTi / 18CrNiMo7-6 Alloy Steel | Carburised, 58–62 HRC; profile-ground DIN/ISO Class 6 |
| Housing Material | Ductile Iron GGG-50 | Machined to Bonfiglioli 310 reference dimensions |
| Sealing / IP Rating | IP65 standard / IP67 optional | Double-lip shaft seals; cassette seals for harsh duty |
| Lubrication | Mineral or Synthetic ISO VG 220/320 gear oil | Vent, level, and drain plug positions match OEM |
| Operating Temperature | -30°C to +100°C | Extended range options for arctic and tropical environments |
| Surface Treatment | Epoxy primer + two-component PU topcoat | Salt spray >500 hours per ISO 9227 |
| Design Life (B10) | 3,000+ hours at rated load | Per ISO 281 bearing life and AGMA 2001 gear durability |
| Certification | ISO 9001:2015, CE Declaration of Conformity | Factory acceptance test report supplied with every unit |
| Lead Time | 7 – 20 days (standard) / 30 – 60 days (custom ratio) | Common 310L2 / 310L3 replacement ratios in partial-build stock |
Core Advantages
Eight engineering and commercial reasons to specify our 310 Series as the Bonfiglioli 310 replacement:
● Verified Dimensional Match
Every 310 Series cross-reference is verified against Bonfiglioli 310 OEM installation drawings — housing bolt pattern, output shaft diameter and keyway, and motor flange pilot diameter — before a cross-reference is confirmed. No assumptions from torque data alone.
● All 7 Standard Variants Covered
310L1, 310L2, 310L3, 310L4 (inline, 1 to 4 stages) and 310R2, 310R3, 310R4 (right-angle with bevel input) — all standard reduction stage counts and all output shaft suffix types are available from our confirmed production range.
● T2max ~40,000 N·m — Matched to OEM
The 310 Series is rated to the Bonfiglioli 310 T2max of ~40,000 N·m (354,000 in·lbs) — ensuring the replacement unit meets the same peak torque capability without upsizing to the 311 or downsizing to the 309 frame.
● Profile-Ground Gear Sets
All sun gears, planet gears, and ring gears are carburised, hardened to 58–62 HRC, and profile-ground to DIN/ISO Class 6 — matching the Bonfiglioli 300 Series production quality standard and not substituted with lower-accuracy hobbed gears to reduce cost.
● 96–98% Per-Stage Efficiency
Rolling-contact planetary gearing delivers 96–98% efficiency per reduction stage — consistent with the original Bonfiglioli 310 specification. In continuous-duty applications (conveyors, hoists, mixers) running thousands of hours per year, this efficiency level directly reduces energy operating cost.
● Full Brake Integration
Hydraulically-released parking brake, DC electric brake, and AC electric brake are all available as factory-integrated options — matching all Bonfiglioli 310 brake configurations and meeting the load-holding requirements of EN 14492-2 for crane hoist and inclined conveyor applications.
● Short Lead Times from Stock
310L2 and 310L3 in the most common gear ratios (25:1 to 400:1) are held in partial-build stock — machined housing and completed gear sets — allowing final assembly and FAT completion within 7–20 days of order, typically faster than OEM Bonfiglioli lead times for replacement units.
● 100% Factory Acceptance Test
Every unit is run at rated torque and speed for a minimum of two hours on our loaded test benches. Oil temperature, housing temperature, vibration, and seal integrity are all measured and reported. A complete test report is supplied with every shipment.
How the 310 Series Inline Planetary Gearbox Works
The 310 Series uses the same coaxial multi-stage planetary gear architecture as the Bonfiglioli 310 it replaces. Five steps describe the complete power flow:
Motor Input
The electric or hydraulic motor drives the first-stage sun gear at rated input speed. The input flange matches the motor standard exactly — IEC, SAE, or NEMA — eliminating adaptor plates in direct replacement installations.
Planet Gear Load Sharing
Three or more planet gears mesh simultaneously with the sun gear and the fixed ring gear (annulus). Each planet carries a proportional share of total torque — enabling the compact 310 housing to transmit ~40,000 N·m peak torque reliably across the full range of gear ratios.
First-Stage Reduction
The planet carrier outputs at reduced speed and amplified torque. Speed drops and torque increases in direct proportion to the first-stage ratio. The coaxial arrangement maintains input-output alignment — the defining feature of an inline planetary gearbox.
Additional Stages
For high ratios — 100:1 to 9,000:1 — the 310 Series adds up to three additional reduction stages. Each stage multiplies output torque while adding only modest axial length, keeping the unit within the same footprint as the original Bonfiglioli 310.
Coaxial Output
The final-stage carrier drives the output shaft or flange — fully coaxial with the motor input — through exactly the same output interface geometry as the Bonfiglioli 310 it replaces, enabling a direct bolt-in installation with no modification to the driven equipment.
310 Series Application Scenarios
The Bonfiglioli 310 is predominantly specified in medium-to-heavy industrial drives. Our 310 Series covers the same application sectors with confirmed dimensional and performance equivalence:
Mining & Industrial Conveyor Drives
The Bonfiglioli 310L2 and 310L3 are among the most common drives for medium-weight belt conveyors, bucket elevators, and chain conveyors in mining, quarrying, and bulk-handling terminals. The 310 Series' T2max of 40,000 N·m covers the rated continuous torque of typical 150–300 kW conveyor drives at ratios of 50:1 to 250:1.
Industrial Hoist & Crane Travel
Overhead crane hoist units and crane long-travel drives in the 150–350 kW power class. The 310 Series with integrated hydraulic or electric brake option meets the load-holding requirements of EN 14492-2. The 310R2 and 310R3 right-angle variants are specified where the motor axis must be perpendicular to the drum or travel-wheel axis.
Cement, Aggregates & Quarry Plant
Drum mixer drives, conveyor head and tail pulley drives, and rotary screen drives in cement and aggregates processing. The 310 Series' carburised and ground planetary gear sets and heavy-capacity output bearings match the continuous shock-load demands of cement plant operation in the 40,000 N·m torque class.
Construction Machinery Auxiliary Drives
Concrete pump truck gearboxes, drilling rig auxiliary winch drives, and piling machine drives. The 310 Series with hydraulic orbit motor input — SAE A through SAE C flanges — is a direct replacement for Bonfiglioli 310 units in these mobile applications, providing the same operating torque in a confirmed bolt-in package.
Marine & Offshore Auxiliary Drives
Deck machinery auxiliary drives and marine winch secondary reduction units. The 310 Series IP67 option and marine coating (ISO 12944 C5-M rated) make it suitable for exposed marine environments. BV, ABS, and Lloyd's certification is available on request for class-society applications.
Agricultural Machinery & Irrigation
TMR feed mixer drives, large-capacity auger drives, and irrigation pump drives. The 310 Series' wide ratio range (3.4:1 to 9,000:1) covers both high-speed auger drives and the ultra-slow feed rates of precision agricultural dispensing equipment. Electric and hydraulic motor input configurations are available for all standard agricultural drive interfaces.
310 Series — Frequently Asked Questions
Common questions from maintenance engineers and procurement teams sourcing Bonfiglioli 310 Series replacements:
Q 01
Is the 310 Series a confirmed bolt-on replacement for the Bonfiglioli 310L2 and 310L3?
Yes. Our 310 Series models are dimensionally verified against Bonfiglioli 310 OEM installation drawings — covering all standard variants from 310L1 through 310L4 and 310R2 through 310R4. Housing bolt pattern, output shaft diameter and keyway dimensions, and motor flange pilot diameter are all confirmed before a cross-reference is issued. Provide the complete Bonfiglioli model number including the reduction stage suffix (L1 through L4) and output shaft suffix (e.g., NHC, FP, NPC) and we return a confirmed dimensional match within 48 hours.
Q 02
What is the T2max of the Bonfiglioli 310 and how does the 310 Series replacement compare?
The Bonfiglioli 310 has a published T2max of 354,000 in·lbs, which converts to approximately 40,000 N·m. Our 310 Series replacement is designed and rated to the same T2max — ensuring the replacement unit can withstand the same maximum peak torque as the original without exceeding its structural limits. This is the critical parameter for hoist and crane applications where momentary peak loads must not exceed the gearbox's rated maximum.
Q 03
How does the 310 Series relate to the Bonfiglioli 309 and 311 in the frame size ladder?
In the Bonfiglioli 300 Series, the 310 sits between the 309 (T2max ~25,000 N·m) and the 311 (T2max ~55,000 N·m). The three frame sizes are dimensionally distinct — the 309, 310, and 311 housings cannot be interchanged. It is essential to confirm the exact frame size from the nameplate before ordering. If the nameplate shows 309 or 311, we supply the correct frame size from our parallel 309 Series or 311 Series replacement range. Always send us the full model number including the frame number.
Q 04
My Bonfiglioli 310L3 has an FP (hollow shaft for shrink disc) output — is this available?
Yes. The hollow shaft with shrink disc (Bonfiglioli suffix FP) is a standard output configuration in our 310 Series and is among the most frequently ordered replacements — particularly for conveyor drum drives where the shrink disc eliminates a rigid shaft coupling. Specify the required shrink disc bore diameter and torque rating when ordering and we confirm the matching output shaft configuration from our standard range.
Q 05
Can the 310 Series also replace Brevini ED2150 and ET3150 in the same torque class?
Yes, with confirmed dimensional cross-reference. The Brevini ED2150 and ET3150 inline planetary models are in the same torque class as the Bonfiglioli 310 (~30,000 N·m continuous rated torque), and our 310 Series cross-reference database covers these models. Provide the Brevini model number including the ratio code and we return a dimensional comparison with our 310 Series equivalent and confirm whether the housing interfaces are directly interchangeable.
Q 06
Can you supply a custom gear ratio not in the standard Bonfiglioli 310 ratio tables?
Yes. The 310 Series modular gear set architecture allows non-standard ratios by selecting alternative sun, planet, and ring gear tooth counts from the modular gear library without requiring entirely new tooling. Submit your required input speed, output speed, and output torque and our engineers calculate the achievable ratio options within the 310 Series housing. Lead time for custom ratio configurations is typically 30–60 days.
Q 07
What quality documentation is supplied with each 310 Series unit?
Every unit is supplied with: (1) full factory acceptance test report — minimum 2-hour loaded run at rated torque and speed, recording oil temperature, housing surface temperature, vibration, noise, and seal integrity; (2) EN 10204 3.1 material test certificates for all alloy steel forgings; (3) heat treatment batch records; (4) gear tooth profile and lead measurement records; (5) CE Declaration of Conformity; (6) installation and maintenance manual in English. All documentation is included in the standard delivery package.
Quality Assurance
- ✓ ISO 9001:2015 Certified Production — all manufacturing processes from raw material incoming inspection to final assembly and test are controlled under our certified QMS.
- ✓ 100% Loaded Factory Acceptance Test — every unit run at rated torque and speed for minimum 2 hours; oil temperature, vibration, noise, and seal integrity recorded; full test report supplied with every unit.
- ✓ Profile-Ground Gear Inspection — all gears measured on CNC gear measuring machines; gear tooth profile and lead records supplied with every unit.
- ✓ EN 10204 3.1 Material Certificates — alloy steel forgings with mill certificates; heat treatment batch records maintained for 10 years.
- ✓ Verified Dimensional Cross-Reference — all OEM replacement cross-references verified against Bonfiglioli 310 installation drawings before confirmation to the customer.
- ✓ CE Declaration of Conformity — supplied with all units; BV, ABS, and Lloyd's certification available for marine and offshore projects on request.
How to Order a 310 Series Replacement
Read the Nameplate
Record OEM brand, frame size, full model number (e.g., 310L3 NHC), gear ratio, and motor flange code from the gearbox nameplate or maintenance manual.
Submit Cross-Reference
Send nameplate data to our engineering team. We verify dimensional match against Bonfiglioli 310 OEM drawings and confirm the 310 Series equivalent within 48 hours.
Confirm Options
Specify brake type (hydraulic / DC / AC / none), output shaft type, input flange standard (IEC / SAE / NEMA), and sealing grade (IP65 or IP67).
Receive Quotation
Firm quotation with lead time, dimensional drawing for installation verification, and CE documentation reference supplied within 48 hours of confirmed cross-reference.
Tested & Shipped
Every unit fully assembled and FAT-tested at rated torque before shipment. Test report, material certificates, and CE documentation included in the delivery package.
Related Products — Compatible Drive Components
Compatible Motors for the 310 Series
The 310 Series is engineered for direct motor attachment across all standard IEC, SAE, and NEMA input flanges — no coupling adaptor required for the most common motor configurations. Our matched motor range covers the complete input power and speed envelope of the 310 Series, from high-frame IEC electric motors for industrial conveyor and hoist drives to high-displacement hydraulic axial-piston motors for mining, construction, and marine applications — all factory-paired and fully loaded-tested as a complete drive assembly before shipment.
Frame 100 to 400, IE3 / IE4 efficiency class, 3 kW to 315 kW — direct IEC B5 flange mount to all 310 Series inline inputs. Optional integrated DC or AC electromagnetic brake for full static load holding on hoist, crane, and inclined conveyor drives where EN 14492-2 compliance is required.
SAE B / C / D flange — displacement 55 to 500 cc/rev, continuous pressure 350–450 bar. The primary motor type for the 310 Series in mining conveyor, crane, port machinery, and marine deck equipment applications requiring the full 40,000 N·m output torque at low hydraulic motor speeds.
SAE A / B / C flange — compact and cost-effective for construction machinery, agricultural drives, and light industrial applications in the 310 Series torque range. Direct SAE flange mount with no adaptor plate required for standard orbit motor configurations matched to the 310 Series input interface.
Ready to Replace Your Bonfiglioli 310 or Equivalent Gearbox?
Whether you need a confirmed replacement for a Bonfiglioli 310L1, 310L2, 310L3, 310L4, 310R2, 310R3, or 310R4 — or an equivalent for a Brevini ED / ET, Dinamic Oil RE, Reggiana Riduttori RR, or other brand model in the same ~40,000 N·m torque class — our engineering team will confirm the 310 Series model, issue a dimensional drawing, and provide a firm quotation within 48 hours.
