Right-Angle Series Planetary Gearbox
Trusted Across Industries:
Agricultural Machinery
Mining & Quarrying
Crane & Lifting Equipment
Marine & Offshore
Construction Machinery
Cement & Aggregates
Paper & Steel Mill
Why Choose Our Right-Angle Series Planetary Gearbox? — The Right-Angle Series is the 90°-output configuration of our modular planetary gearbox range — the same housing family as the inline series, with a spiral bevel gear set added at the input to redirect the motor axis by 90°. Every configuration is dimensionally verified against Bonfiglioli 300R Series OEM installation drawings, covering all frame sizes from 300 through 321 in R2, R3, and R4 stage configurations. Output torque 1,000–450,000 N·m. Ratios 7:1 to 9,000:1. Profile-ground bevel and planetary gear sets throughout. All standard output shaft types and integrated brake options. 100% factory acceptance test with every unit. Free 48-hour cross-reference for any OEM brand and model number.
Right-Angle Series Planetary Gearbox — Product Overview
The Right-Angle Series Planetary Gearbox is the 90°-output variant of our modular planetary gearbox family — designed for applications where the motor and output shaft must be perpendicular to each other, but the installation space is too constrained for a conventional right-angle gearbox. This is achieved by adding a spiral bevel gear first stage to the planetary reduction train: the input shaft enters the bevel stage perpendicular to the housing centreline and drives the first planetary stage at a 90° turn, after which additional planetary stages provide the required total gear ratio and output torque. The result is the same compact housing footprint as the inline version, with the unique spatial flexibility of a right-angle drivetrain.
This architecture exactly mirrors the design of the Bonfiglioli 300 Series R (right-angle) range — which uses a spiral bevel gear set as the first stage before one, two, or three planetary reductions — designated 300R2 (bevel + 1 planetary), 300R3 (bevel + 2 planetary), and 300R4 (bevel + 3 planetary) across all 20 frame sizes from 300 through 321. Our Right-Angle Series replicates every critical OEM dimension — housing bolt pattern, output shaft interface, motor flange pilot diameter — for a confirmed direct dimensional replacement across the entire Bonfiglioli 300R range and equivalent right-angle planetary models from Brevini, Rexroth, Rossi, Zollern, Dinamic Oil, and Reggiana Riduttori.
The full Right-Angle Series covers output torque from 1,000 N·m to 450,000 N·m — matching the Bonfiglioli 300R Series maximum output torque of up to ~395,000 N·m (3,500,000 in·lbs) — with gear ratios from 7:1 (2-stage R2 minimum) to 9,000:1 (4-stage R4 maximum). All gears — bevel and planetary — are carburised, hardened to 58–62 HRC, and profile-ground to DIN/ISO Class 6. 100% factory acceptance test at rated torque. ISO 9001:2015 certified. CE marked.
Inline vs. Right-Angle — When to Choose Each
Both the inline (L) and right-angle (R) versions of the planetary gearbox share the same housing family, output shaft interfaces, and modular brake and input options. The choice between them is driven entirely by the spatial layout of the driven machine:
| Feature | Inline (L) Version | Right-Angle (R) Version |
|---|---|---|
| Input / Output Angle | Coaxial — 0° (same centreline) | 90° — motor perpendicular to output shaft |
| First Stage | Planetary (sun / planet / ring) | Spiral bevel gear set + planetary stages |
| Available Stage Codes | L1 (1 stage) to L4 (4 stages) | R2 (bevel + 1P) / R3 (bevel + 2P) / R4 (bevel + 3P) |
| Minimum Gear Ratio | 3.4:1 (1 planetary stage) | 7:1 (bevel + 1 planetary stage) |
| Maximum Gear Ratio | 9,000:1 | 9,000:1 |
| Typical Applications | Inline motor-to-load: conveyors, hoists, pump drives | Perpendicular motor: crane travel, agricultural PTO, screw conveyors |
| OEM Designation | Bonfiglioli 300L / Brevini ED series | Bonfiglioli 300R / Brevini right-angle series |
Right-Angle Series OEM Cross-Reference — Brand-by-Brand
Our Right-Angle Series Planetary Gearbox provides confirmed dimensional replacement for the following OEM right-angle planetary gearbox families. All housing interfaces, bevel gear box mounting, output shaft geometry, and motor flange standards are verified against OEM installation drawings before any cross-reference is confirmed.
① Bonfiglioli (Trasmital) — 300R Series: Full Frame Size Range
The Bonfiglioli 300 Series R (right-angle) range covers all 20 frame sizes from 300 through 321 in three right-angle stage configurations. Our Right-Angle Series provides confirmed dimensional replacement across the full range. Key frame sizes with T2max values from the Bonfiglioli 300 Series catalogue:
| Bonfiglioli Frame | Right-Angle Models | T2max (N·m) | Typical Application | Our Equivalent |
|---|---|---|---|---|
| 300 | 300R2 / R3 / R4 | ~1,580 | Light conveyor, agitator | RA-300 |
| 301 | 301R2 / R3 / R4 | ~2,430 | Agricultural, packaging | RA-301 |
| 303 | 303R2 / R3 / R4 | ~3,616 | Conveyor, irrigation | RA-303 |
| 305 | 305R2 / R3 / R4 | ~7,006 | Hoist, auger drive | RA-305 |
| 306 | 306R2 / R3 / R4 | ~12,000 | Mixer, crane travel | RA-306 |
| 307 | 307R2 / R3 | ~18,000 | Industrial hoist, screw conveyor | RA-307 |
| 309 | 309R2 / R3 | ~25,000 | Mining conveyor, crane | RA-309 |
| 310 | 310R2 / R3 | ~40,000 | Heavy crane travel, hoist | RA-310 |
| 311 | 311R2 / R3 | ~55,000 | Port crane, mining hoist | RA-311 |
| 313 – 321 | 313R2 to 321R4 | ~65,000 – 395,000 | Large crane, heavy industrial | RA-313 to RA-321 |
② Brevini Riduttori (Dana) — Right-Angle Series
The Brevini right-angle planetary range covers the same torque class as the Bonfiglioli 300R Series. Our Right-Angle Series covers the following Brevini families with confirmed dimensional cross-references:
| Brevini Series | Configuration | Torque Range (N·m) | Typical Application |
|---|---|---|---|
| EM Right-Angle | Bevel + 1–2 planetary | 1,000 – 20,000 | Agricultural, light industrial |
| ED Right-Angle | Bevel + 2–3 planetary | 5,000 – 80,000 | Crane travel, industrial hoist |
| ET Right-Angle | Bevel + 3 planetary | 8,000 – 120,000 | Heavy crane, screw conveyor |
| EC / EQ Right-Angle | Bevel + 3–4 planetary | 15,000 – 200,000 | Mining, port crane, marine |
③ Additional OEM Cross-References
Our Right-Angle Series cross-reference database covers the following additional OEM right-angle planetary families. Submit any model number and we confirm within 48 hours:
| OEM Brand | Series / Models | Torque Range | Notes |
|---|---|---|---|
| Bosch Rexroth | GFT-W Series (Right-Angle) | 2,000 – 150,000 N·m | Bevel + planetary, hydraulic motor input |
| Rossi | RC2E / RC3E / MRC2E / MRC3E | 3,000 – 120,000 N·m | Italian right-angle planetary |
| Zollern | ZHP Right-Angle series | 10,000 – 200,000 N·m | Crane, marine, heavy industrial |
| Dinamic Oil | RA / GBA Series (Right-Angle) | 2,000 – 100,000 N·m | Italian right-angle industrial |
| Reggiana Riduttori | RA Series (Right-Angle) | 1,000 – 80,000 N·m | Conveyor, rotary table, marine |
| Comer Industries | PGR / PGW Series | 500 – 30,000 N·m | Agricultural, light right-angle |
| Fairfield Manufacturing | Right-Angle W Series | 5,000 – 150,000 N·m | Industrial and marine hoist |
Free 48-Hour OEM Cross-Reference Service: Send us the OEM brand, model number (e.g., Bonfiglioli 306R2 HC, Brevini ED right-angle, or Rexroth GFT-W), gear ratio, and motor flange type from the nameplate. Our engineering team confirms the Right-Angle Series equivalent with a dimensional drawing and delivery timeline within 48 hours — at no charge.
Right-Angle Series Planetary Gearbox — Technical Specifications
Standard engineering parameters for the Right-Angle Series production range, aligned with the Bonfiglioli 300R Series and equivalent OEM specifications.
| Parameter | Specification | Notes |
|---|---|---|
| Output Torque Range | 1,000 N·m – 450,000 N·m | Matching Bonfiglioli 300R maximum rated torque |
| Transmissible Power | Up to 540 kW | Matches Bonfiglioli 300 Series power ceiling |
| Gear Ratio Range | 7:1 – 9,000:1 | R2 (bevel + 1P) through R4 (bevel + 3P) |
| Input/Output Angle | 90° — spiral bevel first stage | Gleason spiral bevel gear set; input shaft perpendicular to output |
| Stage Configurations | R2 (bevel + 1 planetary) / R3 (bevel + 2 planetary) / R4 (bevel + 3 planetary) | All Bonfiglioli 300R stage codes matched |
| Output Configurations | Flanged keyed shaft / Splined shaft / Foot keyed / Hollow splined / Hollow with shrink disc | All Bonfiglioli 300R output suffix codes reproduced |
| Input Configurations | Flanged axial-piston motor / Orbit motor / IEC B5 / NEMA / Solid input shaft | SAE A–D hydraulic motor flanges also available |
| Brake Options | Hydraulic-released parking brake / DC electric brake / AC electric brake | Rated to hold full nominal output torque at any ratio |
| Bevel Gear Material | 20CrMnTi / 18CrNiMo7-6 Alloy Steel | Gleason spiral bevel; carburised, profile-ground DIN/ISO Class 6 |
| Planetary Gear Material | 20CrMnTi / 18CrNiMo7-6 Alloy Steel | Carburised, 58–62 HRC; profile-ground DIN/ISO Class 6 |
| Transmission Efficiency | 94% – 97% (bevel stage included) | Bevel stage ~98%; planetary 96–98% per stage |
| Housing Material | Ductile Iron GGG-50 | Machined to OEM reference dimensions |
| Sealing / IP Rating | IP65 standard / IP67 optional | Double-lip radial shaft seals; cassette seals for harsh duty |
| Lubrication | Mineral or Synthetic ISO VG 220/320 gear oil | Separate oil chambers for bevel and planetary stages on larger frames |
| Operating Temperature | -30°C to +100°C | Extended range options available |
| Certification | ISO 9001:2015, CE Declaration of Conformity | FAT report supplied with every unit |
| Lead Time | 7 – 25 days (standard) / 30 – 60 days (custom) | Common frame sizes and ratios in partial-build stock |
Core Advantages of the Right-Angle Series Planetary Gearbox
Eight engineering and commercial reasons to specify our Right-Angle Series:
Our Right-Angle Series covers every Bonfiglioli 300R frame size from 300 through 321 — in R2, R3, and R4 configurations — with confirmed dimensional drawings for every combination. No other replacement supplier covers the complete 300R range from a single product family.
The spiral bevel first stage is cut and ground on Gleason bevel gear generating machines — the same manufacturing method specified in the Bonfiglioli and Brevini OEM production standards. Profile-ground bevel gears run quieter, transmit more torque per unit size, and have significantly longer service life than hobbed alternatives.
The spiral bevel first stage contributes approximately 98% efficiency, and each subsequent planetary stage adds 96–98% — giving an overall system efficiency of 94–97% depending on the stage count. This is significantly better than worm-gear right-angle reducers (typically 60–80%) in the same torque class.
Every Right-Angle Series cross-reference is verified against Bonfiglioli 300R OEM installation drawings — housing bolt pattern, output shaft diameter and keyway, bevel housing input flange dimensions, and motor flange pilot diameter — before confirmation. Dimensional drawing supplied with every confirmed cross-reference.
Beyond Bonfiglioli 300R, our Right-Angle Series cross-reference database covers Brevini ED / ET / EQ / EC right-angle series, Rexroth GFT-W, Rossi RC2E / RC3E / MRC series, Zollern ZHP right-angle, Dinamic Oil RA / GBA, Reggiana Riduttori RA, and Comer PGR / PGW — the broadest single-family right-angle planetary cross-reference coverage available.
The same five output shaft types, four input interface options, and three integrated brake variants available on the inline series are all available on the Right-Angle Series — because both share the same planetary stage and output shaft assembly. Only the bevel input stage differs between the inline and right-angle versions.
Because the spiral bevel first stage is integrated into the same housing as the planetary stages — not added as a separate external gearbox — the Right-Angle Series is only marginally larger than the equivalent inline version. This is the key advantage over external right-angle reducer combinations, which require two separate housings and twice the mounting hardware.
Every unit is run at rated torque and input speed for a minimum of two hours. Oil temperature at both bevel and planetary stages, housing surface temperature, vibration, noise level, and seal integrity are all measured and recorded. A complete test report is supplied with every shipment.
How the Right-Angle Series Planetary Gearbox Works
The Right-Angle Series achieves its 90° input-to-output angle through a spiral bevel gear first stage, followed by one to three planetary reduction stages. Five steps describe the complete power flow:
Motor Input — Perpendicular Axis
The electric or hydraulic motor drives the bevel pinion on the input shaft, which enters the housing at 90° to the output centreline. The input flange matches the OEM motor standard — IEC, SAE, or NEMA — exactly, enabling direct motor retention in replacement installations.
Spiral Bevel Stage — 90° Redirection
The spiral bevel ring gear is mounted on the centreline of the housing, perpendicular to the input pinion. The bevel mesh redirects the power flow by 90° while applying a first stage of speed reduction. The spiral tooth form gives smooth, low-noise operation and higher torque density than straight bevel alternatives.
First Planetary Stage
The bevel ring gear carrier — or a directly connected sun gear — drives the first planetary stage. Planet gears share load across multiple mesh points, amplifying torque further. Power now flows along the output centreline, fully coaxial with the output shaft regardless of the 90° input.
Additional Planetary Stages
For gear ratios above approximately 30:1, the R3 configuration adds a second planetary stage, and the R4 configuration adds a third. Each additional stage multiplies output torque and reduces output speed without changing the housing width — the key advantage over external reducer combinations.
Output — Same Interface as Inline Version
The final planetary stage carrier drives the output shaft or flange — keyed shaft, splined shaft, hollow splined, or hollow with shrink disc — with exactly the same output interface geometry as the equivalent inline version and the OEM gearbox it replaces. No additional adaptor or coupling is required.
Right-Angle Series Application Scenarios
The right-angle planetary gearbox is the standard specification wherever the motor and output shaft must be perpendicular — either because the machine layout requires it, or because the motor cannot be aligned with the driven shaft centreline. Key application sectors:
Crane Travel & Long-Travel Drives
Overhead crane long-travel drives, gantry crane travel wheels, and rail-mounted gantry (RMG) crane travel units where the motor is mounted on the crane structure perpendicular to the travel wheel axis. The Right-Angle Series R2 and R3 configurations are the standard OEM specification for these applications in the Bonfiglioli 306R, 307R, and 309R torque classes.
Agricultural Machinery — PTO-Driven
PTO-driven agricultural equipment where the tractor PTO shaft (horizontal, longitudinal) must drive a perpendicular output — including centre-pivot irrigation machine wheel drives, mower gearboxes, hay tedder drives, and chopper cross-shafts. The Right-Angle Series with PTO-compatible input flange is the direct replacement for Bonfiglioli 300R, 301R, and 303R units in these applications.
Screw Conveyor & Auger Drives
Screw conveyor drives where the motor mounts above or beside the screw shaft rather than in line with it, and large-capacity auger drives in grain handling, construction material batching, and animal feed production. The Right-Angle Series R3 configuration is the most common specification here, providing the high gear ratio needed for slow screw speed in a perpendicular compact package.
Construction Machinery & Concrete Equipment
Concrete pump truck auxiliary drives, mortar mixer right-angle drives, and concrete batching plant screw drives. The Right-Angle Series with hydraulic motor input (SAE B or C flange) is a confirmed direct replacement for Bonfiglioli 300R units in mobile concrete equipment, providing the same output torque and shaft interface in a verified dimensional package.
Marine Deck Equipment
Deck crane slewing drives, cargo handling winch auxiliary drives, and hatch cover drive units where the motor must be mounted at 90° to the slewing axis or winch drum. The Right-Angle Series IP67 option and marine coating (ISO 12944 C5-M) make it suitable for exposed marine environments as a confirmed replacement for Bonfiglioli 300R and Rexroth GFT-W right-angle units.
Paper, Steel & Process Industry
Roll drive units in paper mills and steel rolling lines where the motor is positioned perpendicular to the roll axis to save floor space, and process plant agitator drives where the motor is top-mounted vertically with a horizontal output. The Right-Angle Series larger frame sizes (310R, 311R, 313R) are the correct specification for these heavy industrial drives in the Bonfiglioli 300R replacement range.
Right-Angle Series — Frequently Asked Questions
Common questions from maintenance engineers and procurement teams sourcing Bonfiglioli 300R Series replacements and right-angle planetary gearboxes:
All three configurations use the same spiral bevel gear first stage to redirect the input by 90°. The difference is the number of additional planetary reduction stages: R2 = bevel + 1 planetary stage (lower ratios, ~7:1 to ~50:1); R3 = bevel + 2 planetary stages (medium ratios, ~50:1 to ~500:1); R4 = bevel + 3 planetary stages (high ratios, ~500:1 to ~9,000:1). The R2 is the most compact and lightest; the R4 provides the widest ratio range but is the longest unit. All three configurations share the same output shaft interface and housing bolt pattern for a given frame size.
Yes. Our Right-Angle Series is dimensionally verified against Bonfiglioli 300R OEM installation drawings for all frame sizes from 300 through 321 in all R2, R3, and R4 configurations. Housing bolt pattern, output shaft geometry, bevel housing input face dimensions, and motor flange pilot diameter are all confirmed. Submit the complete Bonfiglioli model number — frame size, R2/R3/R4, and output shaft suffix — and we return a confirmed dimensional drawing within 48 hours.
The spiral bevel first stage introduces a small additional power loss compared with a purely planetary inline design — typically around 1.5–2% per the bevel mesh — because bevel gears have slightly higher sliding losses than parallel-axis planetary gears. A typical Right-Angle Series unit achieves 94–97% overall efficiency, versus 96–98% for the equivalent inline version. This is still significantly better than worm-gear right-angle gearboxes (60–80% efficiency), which is why spiral-bevel-planetary combinations are specified for continuous-duty right-angle applications.
Yes. Flanged hydraulic orbit motor interfaces (SAE A, B, and C flanges) are standard factory options on the Right-Angle Series — covering the most common orbit motors used in mobile construction equipment, agricultural machinery, and crane travel drives. Axial-piston motor flanges (SAE B and SAE C 2-bolt and 4-bolt) are also available for higher-power hydraulic motor inputs. Specify the motor make and frame code when ordering and we confirm the correct input adaptor.
On smaller frame sizes (300 through 307), the bevel and planetary stages share a common oil bath with a single oil fill — the same arrangement as the Bonfiglioli 300R. On larger frame sizes (309 and above), the bevel stage may be provided with a separate oil chamber to allow independent optimisation of the oil viscosity for the bevel mesh and the planetary stages. Consult the installation manual supplied with the unit for the specific oil fill requirement; both mineral and synthetic ISO VG 220/320 gear oils are acceptable for the planetary stages, while the bevel stage may require a hypoid-grade oil on certain large frame applications.
Yes. The Rexroth GFT-W Series right-angle planetary gearboxes are confirmed cross-references in our Right-Angle Series database. The GFT-W uses the same spiral bevel + planetary stage architecture as our Right-Angle Series. Submit the Rexroth GFT-W model number — including the torque code, ratio, and hydraulic motor flange code — and we return a confirmed dimensional cross-reference with our Right-Angle Series equivalent within 48 hours.
Every unit is supplied with: (1) full factory acceptance test report — minimum 2-hour loaded run at rated torque and input speed, recording oil temperature at bevel and planetary stages, housing surface temperature, vibration, noise, and seal integrity; (2) EN 10204 3.1 material certificates for all alloy steel forgings including the bevel gear set; (3) bevel gear tooth contact pattern check record; (4) planetary gear tooth profile and lead measurement records; (5) CE Declaration of Conformity; (6) installation and maintenance manual in English.
Quality Assurance
- ✓ ISO 9001:2015 Certified Production — all manufacturing processes from raw material inspection to final assembly and test are controlled under our certified QMS.
- ✓ Bevel Gear Contact Pattern Check — every Right-Angle Series unit undergoes a bevel gear tooth contact pattern check at assembly — a procedure not performed on inline units — ensuring the spiral bevel mesh is correctly preloaded and the contact pattern is centred before the planetary stages are assembled.
- ✓ 100% Loaded Factory Acceptance Test — every unit run at rated torque and speed for minimum 2 hours; oil temperature at bevel and planetary stages, vibration, noise, and seal integrity recorded; full test report supplied.
- ✓ Profile-Ground Bevel & Planetary Gears — both the spiral bevel gear set and all planetary gear sets are profile-ground to DIN/ISO Class 6; gear measurement records supplied with each unit.
- ✓ EN 10204 3.1 Material Certificates — alloy steel forgings for bevel gears and planetary gear sets with mill certificates; heat treatment records maintained for 10 years.
- ✓ Verified Dimensional Cross-Reference — all OEM cross-references verified against Bonfiglioli 300R and equivalent OEM installation drawings before confirmation.
- ✓ CE Declaration of Conformity — supplied with all units; BV, ABS, and Lloyd's certification available for marine and offshore applications on request.
How to Order a Right-Angle Series Replacement
Read the Nameplate
Record OEM brand, frame size, stage code (R2/R3/R4), full model number (e.g., 307R3 HC), 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 300R OEM drawings and confirm the Right-Angle Series equivalent within 48 hours.
Confirm Options
Specify brake type (hydraulic / DC / AC / none), output shaft type, input motor flange standard (IEC / SAE / PTO / 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, bevel contact pattern checked, 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 Right-Angle Series
The Right-Angle Series is engineered for direct motor attachment — no coupling adaptor required for standard IEC, SAE, and NEMA flanges. Our matched motor range covers the complete input torque and speed envelope of the Right-Angle Series, including hydraulic axial-piston motors, orbit motors, and IEC electric motors, all factory-paired and pre-tested as a complete drive unit before shipment.
SAE A / B / C / D flange — displacement 18 to 500 cc/rev, max pressure 350–450 bar. Direct mount to all Right-Angle Series bevel input flanges for mobile crane, construction, and marine applications.
SAE A / B flange — high torque at low speed, compact and cost-effective for agricultural machinery, crane travel, and conveyor drives where precise positioning is not required.
IEC B5 / B14 frame — 0.37 kW to 315 kW, IE3 / IE4 efficiency class. Optional integrated DC electromagnetic brake for static load holding, replacing the need for a separate gearbox brake on lower-torque configurations.
Ready to Replace Your Bonfiglioli 300R or Equivalent Right-Angle Gearbox?
Whether you need a confirmed replacement for a Bonfiglioli 306R2, 307R3, 309R3, 310R2, 311R3 or any other 300R frame size — or an equivalent for a Brevini ED / ET right-angle, Rexroth GFT-W, Rossi RC series, Zollern right-angle, Dinamic Oil RA, or other OEM model — our engineering team will confirm the Right-Angle Series model, issue a dimensional drawing, and provide a firm quotation within 48 hours.
