Inline Planetary Gearbox Series
Trusted Across Industries:
Aquaculture & Dredging
Irrigation & Water Management
TMR & Feed Mixing
Industrial Conveying & Hoisting
Robotics & CNC Automation
Mining & Construction
Sugarcane & Crop Harvesting
Why Choose Our Inline Planetary Gearbox Series? — Our Inline Planetary Gearbox Series is engineered for the most demanding coaxial drive applications in industrial, agricultural, and mobile machinery. Every unit features case-hardened 20CrMnTi alloy steel planetary gear sets ground to DIN/ISO Class 6 or better, heavy-capacity output bearings, and a fully enclosed housing rated to IP65 as standard. The coaxial (inline) shaft arrangement eliminates the need for a right-angle drive, reducing the drivetrain footprint and simplifying installation — making it the ideal drop-in replacement inline planetary gearhead for Bonfiglioli, Brevini, Rexroth, and other leading OEM brands. Custom ratios, output interfaces, and brake configurations are available — with preliminary engineering response within 48 hours.
Inline Planetary Gearbox — Product Overview
The inline planetary gearbox — sometimes called a coaxial planetary gearbox or coaxial planetary gear reducer — is the most space-efficient configuration in the planetary gear family. Unlike right-angle drives, the inline arrangement places the input and output shafts on the same rotational axis, resulting in a shorter, lighter assembly that integrates directly into almost any drivetrain without changing the direction of torque flow. This coaxial architecture is the reason that inline planetary gearboxes dominate applications where installation space is at a premium: AGV drive units, conveyor tail pulleys, pump drives, hoist units, and servo-driven machine axes all benefit from the straight-line torque path.
Our Inline Planetary Gearbox Series is available in both heavy-duty hydraulic-motor-driven versions — for mobile machinery, dredging, irrigation, and industrial process equipment — and precision servo-driven versions for CNC machining, robotics, packaging, and automation. Both variants share the same core design philosophy: multi-stage planetary gear sets with case-hardened and profile-ground gears, heavy-duty output shaft bearings sized for combined radial, axial, and moment loads, and a fully enclosed housing with positive IP-rated sealing.
As a dedicated inline planetary gearbox manufacturer, our production capability spans from compact gearheads with 50 mm flange diameters and 50 N·m rated torque up to heavy-duty industrial reducers delivering 450,000 N·m of output torque. Every model is available as a direct drop-in replacement inline planetary gearhead for the major OEM brands — Bonfiglioli, Brevini, Rexroth GFT, Dinamic Oil, Reggiana Riduttori, and Zollern — with exact housing dimensions, motor flange standards, and output interface geometry matched to the original specification. Delivery lead times for standard replacement models are typically 7–15 days from stock.
Inline (Coaxial) vs. Right-Angle: Which Design Is Right?
Understanding the structural difference between an inline planetary gearbox (also called a coaxial planetary gearbox) and a right-angle planetary gearbox is critical for correct application selection. The table below summarises the key engineering trade-offs:
| Feature | Inline / Coaxial Planetary Gearbox | Right-Angle Planetary Gearbox |
|---|---|---|
| Shaft Orientation | Input = Output (coaxial, same axis) | Input ⊥ Output (90° turn) |
| Axial Length | Longer along the shaft axis | Compact in axial direction |
| Transmission Efficiency | 96–98% per stage — pure rolling contact | Similar for helical bevel; lower for worm |
| Torque Density | Very high — all load shared across planet gears | High, but bevel gear adds a stress concentration |
| Typical Applications | Hoists, conveyors, pump drives, servo axes, winches | Rotary tillers, flail mowers, fertiliser spreaders |
| Motor Mounting | SAE / IEC / NEMA flange — motor mounts axially | PTO or hydraulic motor mounts at 90° to output |
| Backlash Option | As low as 3 arc-min (precision servo versions) | Standard precision; servo-grade less common |
The coaxial planetary gearbox is the preferred solution whenever the motor and load shaft must remain aligned — for example, in winch and hoist drives where the drum rotates around the gearbox output axis, in chain ditching heads where a hydraulic motor drives the cutter head coaxially, or in servo-driven linear actuators where the motor must remain in-line with the leadscrew.
Inline Planetary Gearbox — Technical Specifications
The following table covers the standard engineering parameters for our Inline Planetary Gearbox Series. Values shown represent the standard production range; parameters outside this range — including custom gear ratios, non-standard motor flanges, and special sealing requirements — are routinely accommodated. Contact our engineering team with your application data for a tailored recommendation.
| Parameter | Specification | Engineering Notes |
|---|---|---|
| Output Torque Range | 50 N·m – 450,000 N·m | Full series from precision servo-grade to heavy industrial |
| Gear Ratio Range | Single: 3:1 – 100:1 / Multi-stage: up to 5,000:1 | Two- and three-stage configurations for high ratios |
| Max Input Speed | Up to 8,000 RPM (servo) / 4,000 RPM (hydraulic) | Varies by size and ratio; refer to model datasheet |
| Transmission Efficiency | 96% – 98% per stage | Rolling contact planetary design — no worm gear losses |
| Backlash (Precision) | As low as 3 arc-min (precision servo grade) | Standard industrial grade: ≤15 arc-min; servo: 3–8 arc-min |
| Shaft Configuration | Coaxial (Inline): Input shaft = Output shaft axis | Hollow-bore, solid-shaft, or splined output available |
| Output Interface | Solid Shaft / Hollow Shaft / Splined Shaft / Flanged Output | DIN 5480 spline standard; custom keyway and bore available |
| Motor Input Flange | SAE A – SAE D / IEC B5 / NEMA 56C–365TC | Custom flange adapters for any hydraulic or servo motor brand |
| Housing Material | Ductile Iron GGG-50 / Cast Steel / Aluminium Alloy (compact) | Aluminium housing option for AGV and weight-critical installs |
| Gear Material | 20CrMnTi / 18CrNiMo7-6 Alloy Steel | Carburised, quenched, 58–62 HRC; profile-ground DIN/ISO Class 6 |
| Gear Stages | 1-stage / 2-stage / 3-stage | Stage count selected to optimise ratio range and efficiency |
| Brake Option | None / Spring-Applied Fail-Safe Brake (SAHR) | Hydraulic or electric release; mandatory for hoist applications |
| Sealing / IP Rating | IP65 standard / IP67 optional | Cassette seals on output shaft for submerged / washdown duty |
| Lubrication | Mineral or Synthetic Gear Oil; Lifetime-Lubricated (grease) optional | ISO VG 220 or 320; first change at 50 hrs in new installations |
| Operating Temperature | -30°C to +100°C | Low-temperature synthetic oil specified for cold-climate applications |
| Surface Treatment | Epoxy primer + two-component PU topcoat | Salt spray >500 hours per ISO 9227 |
| Design Life (B10) | 3,000+ hours at rated load | Calculated per ISO 281 (bearing) and AGMA 2001 (gear) |
| Certification | ISO 9001:2015, CE Declaration of Conformity | Factory test report and material certificates supplied |
| Low Backlash Specifications | 3 – 8 arc-min (precision); ≤15 arc-min (standard) | Specify precision grade for servo, CNC and robotics applications |
| Lead Time | 7 – 15 days (standard OEM replacement) / 20 – 45 days (custom) | Common Bonfiglioli / Brevini / Rexroth drop-in replacements in stock |
Need a low backlash inline planetary gearbox with a specific precision grade, a custom reduction ratio not shown in the standard range, or full dimensional data for a drop-in replacement inline planetary gearhead for your existing machine? Send us your application parameters — our engineers will confirm the correct model and provide a detailed specification sheet within 48 hours.
Inline Planetary Gearbox — Gear Ratio & Model Selection Guide
Select your model class based on the required output torque, input speed, and preferred ratio range. All models support both hydraulic motor and electric motor inputs; servo-grade precision models are indicated below. Contact us with your motor type, required output speed, and application description for a definitive cross-reference.
| Model Class | Rated Torque | Ratio Range | Stages | Typical Applications |
|---|---|---|---|---|
| IPG-S050 | 50 – 500 N·m | 3:1 – 100:1 | 1–2 stage | Servo drives, robotics, CNC axes, AGV motors |
| IPG-M500 | 500 – 5,000 N·m | 5:1 – 200:1 | 1–2 stage | Hose reel irrigation, TMR mixer, conveyor drive |
| IPG-L5K | 5,000 – 50,000 N·m | 10:1 – 500:1 | 2–3 stage | Chain ditching, hoist winch, dredger pump drive |
| IPG-H50K | 50,000 – 200,000 N·m | 20:1 – 1,000:1 | 2–3 stage | Sugarcane harvester final drive, aquatic dredger, mining conveyor |
| IPG-XH200K | 200,000 – 450,000 N·m | 50:1 – 5,000:1 | 3 stage | Heavy industrial hoist, marine winch drive, large-scale RAS drum filter |
How an Inline Planetary Gearbox Works
A coaxial planetary gearbox achieves compact, high-efficiency torque multiplication through a set of planet gears that orbit between a central sun gear and an outer ring gear. Because multiple planet gears share the load simultaneously, torque density is far superior to parallel-shaft or worm-drive alternatives. The five stages below describe the complete power flow in a standard two-stage inline planetary gearbox:
Motor Input
The hydraulic or electric motor drives the first-stage sun gear at high speed and low torque — typically 540–8,000 RPM depending on motor type.
Planet Gear Load-Sharing
Three or more planet gears mesh with the sun gear and walk around the fixed ring gear (annulus). Each planet simultaneously carries a fraction of the total torque — distributing load across all contact points.
First-Stage Reduction
The planet carrier rotates at a reduced speed proportional to the sun-to-ring gear ratio. Speed is reduced and torque is amplified in direct proportion to the gear ratio of the first stage.
Second-Stage (Multi-Stage)
For high reduction ratios, the first-stage carrier output drives a second sun gear, repeating the planetary gear cycle. Each added stage multiplies the torque and divides the speed by the stage ratio, while adding only modest axial length.
Coaxial Output
The final-stage carrier drives the output shaft or flange — which is coaxial (inline) with the motor input shaft. The result: high torque at low speed, delivered in a straight-line drivetrain with 96–98% per-stage efficiency.
Core Advantages of Our Inline Planetary Gearbox Series
Eight engineering features that distinguish our inline planetary gearbox from standard-catalogue products:
● True Coaxial Architecture
Input and output share a common centreline — eliminating right-angle bevel gears, simplifying installation, and reducing the total drivetrain envelope by up to 40% compared to helical bevel units.
● Ultra-Low Backlash Option
Low backlash inline planetary gearbox grades achieve ≤3 arc-min — suitable for CNC contouring, robotic joint drives, and servo-driven positioning systems where positioning repeatability is critical.
● 96–98% Per-Stage Efficiency
Pure rolling-contact planetary gearing delivers a class-leading efficiency of 96–98% per stage — significantly reducing heat generation and energy consumption compared to worm-gear reducers of equivalent ratio.
● Highest Torque Density
Load is shared symmetrically across three or more planet gears — providing the highest torque-per-unit-volume of any gear type. Output torques up to 450,000 N·m are achieved in housings that would not accommodate an equivalent worm or helical bevel unit.
● Profile-Ground Gear Sets
All gear elements — sun, planets, and ring gear — are carburised, hardened to 58–62 HRC, and profile-ground to DIN/ISO Class 6 or better. This ensures consistent tooth geometry, minimal vibration, and long service life even under intermittent shock loads.
● Universal Motor Compatibility
Standard input flanges to SAE J744, IEC 60072, and NEMA MG1 ensure direct mounting compatibility with any hydraulic orbit motor, axial-piston motor, AC induction motor, permanent-magnet servo motor, or BLDC motor in production today.
● Rapid OEM Cross-Reference
Our engineering database covers all major OEM inline planetary gearbox models from Bonfiglioli, Brevini, Rexroth, Dinamic Oil, Reggiana Riduttori, and Zollern. Provide your existing model number and we return a confirmed drop-in replacement inline planetary gearhead specification within 48 hours.
● Full Brake Integration
Spring-applied, hydraulically-released (SAHR) fail-safe parking brakes are available as an integrated option for all hoist, winch, and vertical-lift configurations — maintaining load-holding security on power loss without any additional external brake hardware.
Structure & Material — Engineering Detail
Every component of our inline planetary gearbox is selected to maximise service life under real-world industrial duty cycles. The key structural and material specifications are:
Sun Gear
20CrMnTi alloy steel; carburised 58–62 HRC; profile-ground. The sun gear is the highest-speed element in the gear set and is therefore specified with the tightest hardness and accuracy requirements.
Planet Gears
18CrNiMo7-6 or 20CrMnTi; carburised; 58–62 HRC; profile-ground. Typically three to five planets per stage, equally spaced — ensuring symmetrical load distribution and cancelling out reaction forces on the housing.
Ring Gear (Annulus)
Alloy steel; internal gear teeth ground; integrated into housing casting or as a separate hardened ring. The ring gear carries the reaction torque and transmits it to the mounting flange.
Planet Carrier
Ductile iron GGG-50 or cast steel. Straddle-mounted planet pins and full-complement needle roller bearings or spherical roller bearings for planet pin support — ensuring uniform load sharing and long bearing life.
Output Shaft Bearings
Paired tapered roller bearings (heavy-duty) or deep-groove ball bearings (precision servo grade) — selected and preloaded to handle the specific combination of radial, axial, and moment loads of each application.
Housing & Flange
GGG-50 ductile iron or EN-GJL-250 grey cast iron for heavy-duty models; 6061-T6 aluminium alloy for compact servo-grade models. Housing machined on CNC machining centres to dimensional tolerances ensuring full interchangeability with OEM reference dimensions.
Sealing System
Double-lip radial shaft seals on input and output shafts; cassette-type seal (Duo-Cone equivalent) available for submersible and washdown environments. Housing breather plug rated for IP65 as standard; sealed expansion chamber available for IP67.
Surface Protection
Shot-blasted housing; two-coat paint system (epoxy primer + two-component PU topcoat, RAL 5010 gentian blue as standard). Marine and offshore models receive additional zinc-rich primer and specified to salt-spray Class C5-M per ISO 12944.
Inline Planetary Gearbox — Application Scenarios
The coaxial shaft arrangement and high torque density of the inline planetary gearbox make it the preferred drive solution in a wide range of industrial, agricultural, and mobile-machinery applications. Representative scenarios documented from technical literature and customer deployments are summarised below:
Chain Ditching & Trenching
Inline planetary gearboxes are used at the head of chain-type trenching and large rotary ditching machines, connected to a hydraulic orbit motor. The coaxial drive allows the hydraulic motor to mount directly behind the cutter head, eliminating the need for a right-angle bevel box while delivering the high torque needed to penetrate hard soil and break up root systems.
Aquaculture Dredger Cutter Head
Water-cooled inline planetary gearboxes drive the submerged rotary cutter heads of aquaculture and environmental dredging machines. The coaxial output connects directly to the cutter head drum, while the unit's IP67-rated sealing and positive-pressure compensation system prevent slurry ingress. High torque at low RPM is essential for cutting packed bottom sediment.
Hose Reel Irrigation Systems
Multi-speed inline planetary gearboxes drive the main take-up drum on turbine-driven and PTO-driven hose reel irrigators. The coaxial design allows the turbine or PTO motor to mount directly behind the gearbox on the same axis as the drum, simplifying the drivetrain. Gear ratio options provide variable drum speeds to match reel-in rate against hose diameter and field length.
Vertical TMR Feed Mixer
Heavy-duty inline planetary gearboxes are mounted vertically at the base of the mixing tub in vertical TMR (total mixed ration) mixer wagons, driving the auger that cuts and blends whole round bales with concentrate and mineral supplements. The multi-stage planetary configuration provides the high-reduction, high-torque output needed to handle full bale ingestion without stalling, while maintaining a compact, low-profile tub floor profile.
Rotary Drum Filter (RAS Aquaculture)
In recirculating aquaculture systems (RAS), micro-filtration drums rotate at 3–8 RPM to filter fish waste from process water. Shaft-mounted inline planetary gearboxes — sometimes helical-worm compound units in this application — provide the combination of high reduction ratio and coaxial output needed to drive the large-diameter drum directly from an IEC-flange motor, without a separate torque arm or coupling.
Sugarcane Harvester Final Drive
Multi-stage inline planetary gearboxes — typically from the Bonfiglioli 600/700C series or equivalent — provide the final wheel drive on tracked and wheeled sugarcane harvesters. The coaxial output connects the hydraulic drive motor directly to the wheel hub in the most compact possible format, with output torques exceeding 85,000 N·m. Mechanical lifetime seals are mandatory to exclude sugarcane mud.
OEM Cross-Reference — Drop-in Replacement Inline Planetary Gearhead
Our inline planetary gearbox is engineered to replace the following OEM series on a direct-fit, drop-in basis — matching all critical dimensions: motor flange standard, housing bolt pattern, output shaft diameter and keyway, and mounting hole pattern. Provide your existing unit's model number and we return a confirmed cross-reference with full dimensional data within 48 hours.
| OEM Brand | Series / Model | Torque Range | Typical Applications |
|---|---|---|---|
| Bonfiglioli | 300/600/700C Series (Inline) | 500 – 180,000 N·m | Harvester final drive, conveyor, hoist |
| Brevini (Dana) | ED / EM Inline Series | 1,000 – 250,000 N·m | Mining conveyor, hoist winch, industrial drive |
| Rexroth (Bosch) | GFT Inline / MCG Series | 800 – 200,000 N·m | Track drive, wheel drive, hoist |
| Dinamic Oil | IMR / IPR Inline Reducers | 1,500 – 120,000 N·m | Winch, conveyor, agricultural machinery |
| Reggiana Riduttori | RR Inline Planetary Series | 500 – 80,000 N·m | Rotary table, industrial conveyor, hoist |
| Zollern | ZHP / ZHE Inline Series | 1,000 – 150,000 N·m | Crane hoist, dredger, heavy conveyor |
| Omni Gear | RC / SD04 Inline Drives | 500 – 30,000 N·m | Auger, conveyor, agricultural equipment |
| Hägglunds (Rexroth) | LMF / RMF Inline Motor-Gearbox | 2,000 – 450,000 N·m | Dredger, heavy winch, paper machine drive |
Free 48-Hour OEM Cross-Reference Service: Send us the OEM brand, series, model number, and rated output torque of your existing inline planetary gearbox — or simply your application parameters (motor type, output speed, required torque, and mounting interface). Our engineering team will confirm the exact drop-in replacement inline planetary gearhead from our production range, or initiate a custom engineering enquiry where a standard replacement is not available. Submit your cross-reference request →
Related Products — Compatible Drive Components
Compatible Motors for the Inline Planetary Gearbox Series
The Inline Planetary Gearbox Series is engineered for direct motor attachment across all standard SAE, IEC, 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 series, from compact servo motors for precision automation and robotics, to hydraulic orbit and axial-piston motors for heavy-duty irrigation, dredging, TMR mixing, chain ditching, and industrial machinery — all factory-paired and fully loaded-tested as a complete drive assembly before shipment.
Frame 56 to 400, IE3 / IE4 and servo PM motors, 0.12 kW to 315 kW — direct IEC B5 flange mount to all inline series input interfaces. Optional integrated electromagnetic brake for full static load holding on hoist and vertical-lift drives.
SAE A / B / C / D flange — orbit motors for compact, cost-effective drives in irrigation and agricultural equipment; axial-piston motors for high-torque chain ditching, dredging, and industrial hoist applications requiring full output torque up to 450,000 N·m.
Zero-backlash clamp couplings and NEMA 56C–365TC adaptor flanges for servo motor, BLDC, and AC inverter-duty motor installations in CNC, robotics, AGV, and precision automation applications — matched to the low-backlash (3–8 arc-min) precision grade inline series.
Inline Planetary Gearbox — Frequently Asked Questions
Technical questions we regularly receive from engineers and procurement teams sourcing inline planetary gearboxes:
Q 01
What is the difference between an inline planetary gearbox and a coaxial planetary gearbox?
They are the same thing. Inline planetary gearbox and coaxial planetary gearbox are interchangeable terms for a planetary gear reducer in which the input shaft and output shaft share the same rotational axis. This distinguishes the design from a right-angle planetary gearbox, where the output shaft is perpendicular to the input. Other synonyms include coaxial planetary gear reducer, inline planetary gearhead, and in-line planetary gear drive.
Q 02
What are the available low backlash inline planetary gearbox specifications?
Our precision servo-grade models achieve backlash as low as 3 arc-min in single-stage versions and 5–8 arc-min in two-stage versions. Standard industrial grade models are specified at ≤15 arc-min. For servo positioning, CNC contouring, and robotic joint applications, specify the precision grade at the time of enquiry. Backlash values are measured at the output shaft with the input shaft fixed, at the rated load torque, per DIN 3962.
Q 03
Can you supply a drop-in replacement inline planetary gearhead for a Bonfiglioli 600 Series?
Yes. Our most frequently requested cross-references include the Bonfiglioli 300, 600, and 700C series in inline configuration, the Brevini ED/EM inline series, the Rexroth GFT inline series, and Dinamic Oil IMR/IPR reducers. Provide the OEM series and model number (including the motor flange code and output torque class) and we return confirmed dimensional drawings and a delivery schedule within 48 hours. Common models are held in partial-assembly stock for fast build-to-order completion.
Q 04
What motor types are compatible with your inline planetary gearbox input flanges?
Our inline planetary gearboxes are available with input flanges to SAE J744 (SAE A through SAE D) for hydraulic orbit and axial-piston motors, IEC 60072 B5/B14 flanges for AC induction and permanent-magnet motors, NEMA 56C–365TC flanges for North American motors, and custom machined adaptor plates for any non-standard motor interface. For servo motor applications, zero-backlash clamp-type couplings are available.
Q 05
Why choose a planetary gearbox over a worm gear reducer for a high-reduction application?
For output torque applications above approximately 1,000 N·m, the inline planetary gearbox offers a decisive efficiency advantage over worm-gear reducers. A worm drive typically operates at 50–70% efficiency due to sliding contact, whereas a planetary gear stage achieves 96–98% through rolling contact. In a 50 kW drive running 3,000 hours per year, this difference can represent 10,000–15,000 kWh in annual energy cost. Additionally, the planetary gear's higher torque density means a smaller, lighter housing for the same output torque rating.
Q 06
Is a parking brake available for hoist and vertical-lift applications?
Yes. A spring-applied, hydraulically-released (SAHR) fail-safe parking brake is available as an integrated option on all inline planetary gearbox models rated above 500 N·m. The brake is designed to the same SAHR principle used on winch drive and track drive planetary gearboxes — applying automatically on power loss or signal loss, and releasing when system hydraulic or electrical pressure is restored. This configuration meets the load-holding requirements of EN 14492-2 (crane hoist standard) and comparable international regulations for suspended load applications.
Q 07
Can inline planetary gearboxes be used in submerged or washdown environments?
Yes. Our IP67 option — featuring Duo-Cone equivalent cassette seals on both the input and output shafts, a sealed expansion chamber in place of a standard breather plug, and a pressure-compensating oil filling port — is designed for submerged operation and high-pressure washdown environments. This configuration is standard for aquaculture dredger cutter head drives and has also been applied to drum filter drives, irrigation pond pump-drive gearboxes, and food-processing conveyor drive units.
Q 08
What quality assurance process does each inline planetary gearbox go through before shipment?
Every inline planetary gearbox produced in our facility is subject to a 100% loaded factory acceptance test (FAT) on our test benches, running at rated torque and input speed for a minimum of two hours. Parameters recorded include operating temperature (oil and housing), vibration signature, efficiency (input vs. output power balance), and leak test under pressure. Gear tooth contact patterns are checked on all precision-grade models before assembly. A test report is supplied with every unit. Our production facility operates under ISO 9001:2015 certification.
Quality Assurance
- ✓ ISO 9001:2015 Certified Production — every manufacturing process from raw material incoming inspection to final assembly and test is controlled under our certified QMS.
- ✓ 100% Loaded Factory Acceptance Test — every unit run at rated torque and speed for a minimum of 2 hours; test report supplied with every shipment.
- ✓ Gear Tooth Profile and Lead Inspection — all gears measured on CNC gear measuring machines to DIN/ISO accuracy grade; precision-grade gears supplied with individual inspection records.
- ✓ Material Certificates and Traceability — alloy steel forgings supplied with EN 10204 3.1 material test certificates; heat treatment batch records maintained for 10 years.
- ✓ Salt Spray and Sealing Validation — housing coating validated to >500 hours ISO 9227 salt spray; seal performance validated on accelerated life test rigs simulating washdown and submerged conditions.
- ✓ CE Declaration of Conformity — supplied with all units sold into the European Economic Area; additional classification society certification (DNV, BV, ABS, Lloyd's) available for marine and offshore applications.
How to Select the Right Inline Planetary Gearbox
Define Required Output Torque
Determine rated and peak output torque at the driven shaft. Include service factor for duty cycle and shock load class.
Specify Input Motor Interface
Identify motor type (hydraulic, AC, servo), shaft diameter, and flange standard (SAE, IEC, NEMA) to confirm input adapter.
Confirm Gear Ratio
Divide motor rated speed by required output shaft speed to obtain the nominal ratio. Choose the nearest standard ratio or specify custom.
Select Output Interface
Specify solid shaft, hollow bore, splined output, or flanged output. Confirm shaft diameter, keyway dimensions, or spline standard (DIN 5480 or ISO 4156).
Specify Environment & Options
Confirm IP rating, operating temperature range, brake requirement, backlash grade, and any OEM cross-reference. Submit to our engineers for final selection and lead time.
Free Application Engineering Review for Inline Planetary Gearbox Selection
Whether you need a standard catalogue model, a low backlash inline planetary gearbox for a precision servo application, a high-torque heavy-duty unit for mining or dredging, or a confirmed drop-in replacement inline planetary gearhead for an existing machine, our engineering team is ready to assist. Submit your application parameters — motor type, required output torque, output speed, environmental conditions, and any OEM cross-reference — and receive a confirmed gearbox specification, dimensional drawing, and delivery schedule within 48 hours.
