Introduction
Industrial gearboxes and gearmotors from major European, American, and Japanese brands are widely used in production lines, conveyors, mixers, packaging equipment, food processing machinery, and material handling systems worldwide.
When an existing unit fails, becomes obsolete, or has a long OEM lead time, waiting weeks or even months for the original replacement is often not an option. Many manufacturers and distributors also look for alternative sources to reduce replacement costs, support equipment expansion, or maintain spare parts inventory.
LiuDrive provides OEM-compatible gearbox and gearmotor replacement solutions for a wide range of international brands, including SEW-Eurodrive, Nord Drivesystems, Bonfiglioli, Flender, Sumitomo, Rossi, Motovario, Chiaravalli, Nissei and more.
Based on the original model number, drawings, nameplates, or product photos, our engineering team can help verify mounting dimensions, shaft interface, gear ratio, torque requirements, and motor compatibility before quotation.
This guide explains what a 1:1 gearbox replacement means, which brands and series we commonly support, what information is needed for compatibility checking, and how LiuDrive helps customers find suitable replacement solutions.
What Does a 1:1 Gearbox Replacement Mean?
A 1:1 replacement means the alternative gearbox or gearmotor is dimensionally and functionally compatible with the original OEM unit.
Typical matching points include:
- Mounting footprint and bolt pattern — installs into the existing machine without modification
- Shaft dimensions and keyway — coupling, sprocket, pulley, or other driven components can be mounted directly
- Input interface or motor flange — matches the original IEC, NEMA, or integrated motor configuration where applicable
- Gear ratio and output speed — maintains the required speed reduction for the application
- Rated output torque — torque capacity matches the original application requirements
- Mounting position and overall envelope — fits within the existing installation space
External appearance may differ. Non-critical details such as housing contours, casting ribs, surface finish, color, nameplate, and branding may vary from the original OEM unit, while the mounting dimensions, shaft interface, ratio, and performance remain compatible.
Every LiuDrive replacement is evaluated according to the original model number, nameplate data, drawing, confirmed dimensions, mounting arrangement, and application requirements. Replacement feasibility is confirmed model by model before quotation.
Typical Replacement Scenarios
OEM Lead Times Are Too Long Production downtime can be more expensive than the gearbox itself. A compatible replacement often restores operations faster than waiting for OEM supply.
Original Models Are Discontinued Many gear units remain in service long after OEM production or support has ended. Compatible replacements extend equipment service life without a costly redesign.
Spare Parts Are No Longer Available Instead of rebuilding worn gearboxes, many customers choose a complete replacement solution — often faster and more cost-effective.
Equipment Expansion Projects Additional drive units are required to match existing installed equipment, where exact dimensional compatibility is critical.
Distributor Inventory Programs Distributors require reliable alternative sources to reduce procurement costs, shorten delivery times and improve stock availability for their customers.
Brands We Commonly Support
SEW-Eurodrive Gearbox & Gearmotor Replacement
SEW-Eurodrive is one of the world’s leading industrial drive manufacturers. Its modular R, F, K, S and W series gearmotors are widely used in industrial power transmission applications. For heavy-duty applications, SEW MC and X series industrial gear units are commonly used in steel, mining, cement and bulk material handling.
LiuDrive provides compatible replacement solutions for selected SEW-Eurodrive gearbox, gearmotor and industrial gear unit families, evaluated according to the original model number, mounting dimensions, shaft interface, gear ratio and torque requirements.
R Series — Helical Inline Gearbox / Gearmotor
SEW’s most widely installed series globally. Helical inline design for high-efficiency continuous operation.
- Gear ratio: 1.30–289.74
- Output torque: up to 20,000 Nm
- Typical applications: conveyors, material handling, steel plants, paper machinery, general industrial drives
F Series — Parallel Shaft Helical Gearbox / Gearmotor
Compact parallel-shaft helical design for space-limited installations requiring high torque transmission.
- Output torque: up to 20,000 Nm
- Typical applications: conveyors, logistics systems, material handling, processing machinery
K Series — Helical-Bevel Gearbox / Gearmotor
Right-angle helical-bevel design with high efficiency and high torque density.
- Output torque: up to 50,000 Nm
- Typical applications: heavy conveyors, mixers, agitators, steel mills, bulk handling systems
S Series — Helical-Worm Gearbox / Gearmotor
Compact right-angle helical-worm combination for moderate-duty applications requiring quiet operation.
- Gear ratio: 3.97–288.00
- Output torque: up to 4,300 Nm
- Typical applications: packaging lines, food processing, light industrial equipment, auxiliary drives
W Series — SPIROPLAN® Compact Right-Angle Gearmotor
SEW’s compact SPIROPLAN® right-angle drive. Lightweight aluminium housing, lubrication-for-life concept, multiple mounting positions.
- Power range: 0.09–4 kW
- Typical applications: food and beverage lines, packaging machinery, small conveyors
MC & X Series — Industrial Gear Units
Heavy-duty industrial gear units for demanding applications. MC series covers 5,987–64,401 Nm; X series covers extreme torque applications.
- Typical applications: mining, cement, steel, cranes, bulk material handling
Send us your SEW model number, nameplate photo or drawing (e.g. R57 DRN100M4, RF57 DRN100M4, KA67 DRN132M4). We confirm replacement feasibility within 24 hours.
Nord Drivesystems Gearbox & Gearmotor Replacement
Nord Drivesystems is a widely recognized German gearbox and gearmotor manufacturer. Their UNICASE one-piece housing design is widely used across logistics, food processing and intralogistics applications. Nord’s range spans compact worm units through to MAXXDRIVE heavy industrial gear units capable of 282,000 Nm.
LiuDrive provides compatible replacement solutions for selected Nord gearbox and gearmotor families, including:
- NORDBLOC.1 helical inline gear units (SK 02–SK 102, 11 sizes, up to 23,160 Nm)
- Helical-bevel gear units (SK 9012.1–SK 9096.1, IP69K wash-down variants for food industry)
- FLEXBLOC universal worm gear units (SK 1SI series, compact, multi-position mounting)
- Helical-worm gear units (SK 071.1–SK 1071.1, 10 sizes, up to 3,300 Nm)
- MAXXDRIVE XC industrial gear units (11 sizes, 15,000–282,000 Nm, for conveyors, mills, agitators)
- MAXXDRIVE XT & XJ series (high ratio and right-angle heavy industrial configurations)
Bonfiglioli Gearbox & Gearmotor Replacement
Bonfiglioli is one of Europe’s largest gearbox and gearmotor manufacturers, with products widely used in industrial automation, packaging, food processing, logistics, mining and heavy-duty power transmission. Their product range covers worm, helical, helical-bevel, parallel shaft, shaft-mounted and planetary configurations.
LiuDrive provides compatible replacement solutions for the following Bonfiglioli series:
VF / W Series — Worm Gearboxes Bonfiglioli’s most widely distributed series globally. Compact right-angle worm design combining quality with price effectiveness.
- Typical applications: packaging, food and beverage, light industrial, automated machinery
C Series — Inline Helical Gearboxes Standard inline helical gear units. 2-, 3- and 4-stage versions providing a wide range of gear ratios. ATEX-rated versions available.
- Typical applications: conveyors, material handling, industrial production lines
A Series — Helical-Bevel Gearboxes Right-angle helical-bevel design. The most efficient and durable product in Bonfiglioli’s light and medium-duty portfolio.
- Typical applications: packaging, conveyors, automation, logistics
F Series — Helical Parallel-Shaft Gearmotors & Units Parallel shaft output for compact inline drive requirements.
- Typical applications: conveyors, material handling, processing machinery
AS Series — Inline Helical Gear Units Recognized inline helical gear units for industrial drive applications.
- Typical applications: conveyors, industrial machinery, production equipment
TA Series — Shaft Mounted Gearboxes Long-established shaft-mounted design for quarry, mine and inclined conveyor applications. Backstop option standard.
- Typical applications: quarries, mines, inclined conveyors, aggregate handling
HDO / HDP Series — Heavy-Duty Industrial Gear Units Right-angle (HDO) and parallel shaft (HDP) heavy-duty helical gear units for the harshest industrial environments. ATEX-rated versions available.
- Typical applications: mining, cement, metals, chemical processing
300 / 300M Series — Industrial Planetary Gearboxes Modular planetary design for severe duty. 20 sizes; ATEX certification available.
- Typical applications: conveyors, mining, heavy lifting, process drives
For heavy-duty and planetary gearboxes, we recommend providing the nameplate, drawing and application details for engineering confirmation.
Flender Gear Unit Replacement
Flender industrial gear units are widely used in steel, cement, mining, power generation, paper, marine and heavy process industries. These units are often application-specific and selected according to torque, service factor, mounting arrangement, shaft configuration and duty conditions. Flender’s torque range spans 3,300 Nm to 1,400,000 Nm.
LiuDrive supports selected Flender replacement projects, including:
B Series — Bevel-Helical Industrial Gear Units The most widely installed Flender series. Modular bevel-helical design with extensive sizing range. Model coding covers stage count, shaft orientation and mounting configuration:
- B2SH / B3SH / B4SH — 2/3/4-stage, horizontal, solid output shaft
- B2SV / B3SV / B4SV — vertical, solid shaft
- B2HH / B3HH / B4HH — horizontal, hollow output shaft
- B2HV / B3HV / B4HV — vertical, hollow shaft
- B2HM / B3HM / B4HM — with motor flange
- Size range: 4 through 26 | Output torque: 3,300–1,400,000 Nm
H Series — Parallel Shaft Helical Industrial Gear Units Parallel shaft configuration with equivalent size range and variant coding to the B series.
- Typical applications: belt conveyors, mills, crushers, bucket elevators, heavy process drives
PLANUREX Series — Planetary Gear Units For applications requiring high torque in a compact envelope.
- Typical applications: hoists, mining drives, rolling mills
Replacement feasibility for Flender must be confirmed according to the full model code, nameplate data, drawings, ratio, torque, shaft arrangement, mounting position and operating conditions.
Sumitomo Gearbox & Gear Reducer Replacement
Sumitomo Drive Technologies is known worldwide for heavy-duty gear units and cycloidal drives in mining, steel, cement, chemical, food processing, port machinery and other demanding continuous-duty applications.
LiuDrive provides compatible replacement solutions for selected Sumitomo product families, including:
Paramax — Heavy-Duty Modular Gear Units Modular helical and bevel-helical gear units for severe service. Inline and right-angle configurations.
- Gear ratio: 6.3–500
- Typical applications: mining conveyors, agitators, kilns, heavy industrial drives
Cyclo 6000 — Cycloidal Gearmotors 500% instantaneous shock load capacity. Ultra-high reduction ratios in a single stage. Compact envelope.
- Gear ratio: 2.5–658,503
- Typical applications: steel mills, ports, paper machinery, chemical plants, food processing
Helical Buddybox & Bevel Buddybox — Compact Gear Units Compact helical and bevel-helical gear units for general industrial applications.
- Typical applications: conveyors, material handling, general industrial drives
For Sumitomo replacements, please provide the model code, ratio, motor power, mounting type and nameplate photo.
Rossi Gearbox & Gearmotor Replacement
Rossi has over 70 years of industrial gear unit manufacturing experience. Their G Series is among the most widely installed right-angle industrial gear units in European and global process industries, covering applications from packaging lines to heavy industrial drives.
LiuDrive provides compatible replacement solutions for the following Rossi families:
G Series — Helical and Bevel-Helical Gear Units Core industrial range. 18 sizes; inline and right-angle configurations; extensive mounting and shaft output options.
- Output torque: up to 103,000 Nm | Gear ratio: 2–400
- Typical applications: conveyors, mixers, industrial machinery, process drives
H Series — High-Torque Industrial Gear Units Higher torque capacity than the G series for the most demanding applications.
- Typical applications: mining, cement, heavy industrial process drives
EP Series — Planetary Gear Units GLEASON spiral bevel gear pairs with ground profile. Inline and bevel-helical output.
- Output torque: up to 3,000,000 Nm | Gear ratio: 3.55–3,550
- Typical applications: mining conveyors, heavy lifting, hoists
A / AS Series — Worm Gearmotors Standard and Standardfit worm gearmotor range. AS series is dimensionally interchangeable with other major worm gearmotor brands.
- Typical applications: packaging, food, automation, light conveyor drives
E Series — Inline Helical Gearmotors Coaxial inline helical gearmotor for parallel shaft applications.
- Typical applications: conveyors, material handling
iFit Series — Interchangeable Gearmotors Engineered to standard IEC footprint dimensions for direct interchangeability with other brands.
- Typical applications: retrofit and replacement in European industrial machinery
Motovario Gearbox & Gearmotor Replacement
Motovario products are widely used in packaging, food processing, textile machinery, conveyor systems and light-to-medium industrial machinery. Its product range includes helical gear reducers, helical bevel gear reducers, shaft-mounted gear reducers, worm gear reducers, planetary gear reducers and mid heavy-duty gear reducers.
LiuDrive provides compatible replacement solutions for commonly requested Motovario series, including:
H Series — Helical Gear Reducers Inline helical gear reducers for continuous industrial operation.
- Typical applications: conveyors, material handling, industrial production lines
B Series — Helical Bevel Gear Reducers Right-angle helical bevel gear reducers for compact and efficient power transmission.
- Typical applications: conveyors, packaging machinery, food processing equipment
S Series — Shaft-Mounted Gear Reducers Shaft-mounted gear reducers for conveyor and material handling applications.
- Typical applications: conveyors, bulk handling, industrial equipment
VSF Series — Worm Gear Reducers Worm gear reducers including NMRV / NMRV Power and related worm gearbox configurations.
- Typical applications: packaging, food processing, conveyors, general industrial drives
HPL Series — Planetary Gear Reducers Planetary gear reducers for compact high-torque applications.
- Typical applications: automation, positioning systems, industrial machinery
MHD Series — Mid Heavy Duty Gear Reducers Mid heavy-duty gear reducers for more demanding industrial applications.
- Typical applications: process machinery, heavy conveyors, industrial production equipment
Send us the Motovario model code, frame size, ratio and mounting type for compatibility confirmation.
Chiaravalli Gearbox & Gearmotor Replacement
Chiaravalli produces compact gearboxes and gearmotors used in packaging, automation, food and beverage equipment, conveyors and light industrial machinery across European OEM production.
LiuDrive provides compatible replacement solutions for the following Chiaravalli families:
CHC Series — Compact Inline Helical Gearmotors Widely used in European OEM packaging, conveyor and automation machinery.
- Input power: 0.12–4 kW | Gear ratio: 3.66–58.09
- Typical applications: conveyors, packaging lines, automation
CHO Series — Compact Hypoid Gearmotors Right-angle hypoid gearing. Higher efficiency and quieter operation than worm for right-angle compact drives.
- Input power: 0.12–5.5 kW | Gear ratio: 7.48–302.5
- Typical applications: packaging, food conveyors, light positioning
CHM Series — Worm Gearboxes Compact worm gearbox range for light-duty right-angle applications.
- Typical applications: light industrial drives, packaging accessories
Nissei Gearmotor & Gear Reducer Replacement
Nissei gearmotors and gear reducers are commonly integrated into Japanese-origin OEM equipment, especially in food processing, packaging, electronics assembly and automation machinery exported globally.
LiuDrive provides compatible replacement solutions for selected Nissei compact parallel shaft and right-angle gearmotor configurations. Send the Nissei model number, nameplate photo, ratio, shaft arrangement and motor specification for compatibility checking.
Real Replacement Project Example
Girard DYNABOX 63 B45CRH1 — Customer in Thailand
| Details | |
|---|---|
| Original Brand | Girard Transmissions |
| Original Model | DYNABOX Type 63 B45CRH1 |
| Original Motor | Nidec Servo Motor — 115UJB300BACAA115190, 2.1 kW |
| Customer Region | Thailand |
| Production Lead Time | 15 days |
Based on the original gearbox, nameplate information and application requirements, LiuDrive manufactured a compatible replacement unit matching mounting dimensions, input interface, output interface, gear ratio and servo motor compatibility. The replacement was supplied without requiring any modification to the customer’s equipment.
This project illustrates that our replacement capability is not limited to the brands listed in this guide. If your existing unit is from a brand not listed here, send us the nameplate or photos — our engineers will evaluate replacement feasibility.
How to Confirm Compatibility
Even without original drawings, compatibility can often be confirmed using basic information.
What to send us:
- Original brand and model number (e.g. SEW R57DRN100M4, Nord SK9016.1, Flender B3SH10)
- Nameplate photo
- Motor nameplate
- Product photo
- Key parameters if available: gear ratio, output torque, shaft dimensions, mounting type, motor power, voltage and frequency
In many cases, clear photos are sufficient for our engineers to begin a compatibility evaluation. For urgent MRO replacement, same-day or 24-hour confirmation is usually possible when nameplate data is available.
👉 Request a Compatibility Confirmation
Why Buyers Choose LiuDrive
- 39+ years of transmission industry experience
- Flexible MOQ from 1 unit
- OEM and custom manufacturing support
- Reverse engineering capability
- Fast compatibility verification
- Competitive factory-direct pricing
- Global replacement project experience
Frequently Asked Questions
Can I order a gearbox only, without an integrated motor?
Yes. LiuDrive supplies standalone gearboxes and gear units with IEC or NEMA input flanges, allowing your existing motor to be reused when technically suitable. Integrated gearmotors are also available.
Are LiuDrive gearboxes dimensionally compatible, or just visually similar?
Compatibility means we verify the mounting footprint, shaft dimensions, flange interface, gear ratio, and application requirements against the original OEM model, drawing, or confirmed dimensions. External appearance may differ, but installation and functional compatibility are the focus of our evaluation.
Can I order a single unit for fit testing?
Yes. Many customers start with one unit for installation verification before placing repeat or stocking orders. There is no minimum order quantity.
What voltage and frequency options are available for integrated gearmotors?
Standard options include 380V/50Hz, 400V/50Hz, 415V/50Hz, and 460V/60Hz. Other voltage and frequency requirements are available on request.
My brand is not listed here — can you still help?
Yes. Send us a photo and nameplate data. We support more brands and series than listed in this guide. Reverse engineering support is also available for obsolete, discontinued, or non-standard gear units.
Can you replace discontinued gearbox models?
Yes. In many cases, compatibility can be confirmed using photos, nameplates, or existing dimensions, even when the original model is no longer in production.
Do you support private labeling for distributors?
Yes. For distributor orders, LiuDrive can support private label packaging, custom RAL colors, branded documentation, and OEM production arrangements.
What documentation comes with each shipment?
Standard shipment documents usually include a commercial invoice, packing list, product certificate, and user manual. For project-based or customized orders, additional technical documents can be provided upon request, such as inspection records, material certificates, bearing certificates, gear inspection reports, lubrication specifications, and factory test records.
If specific documentation is required, please let us know before production so that the necessary inspection and reporting process can be arranged.
Request a Compatibility Check
LiuDrive provides compatible replacement solutions for industrial gearboxes, gearmotors, gear units and gear reducers from major global brands — including SEW-Eurodrive, Nord Drivesystems, Bonfiglioli, Flender, Sumitomo, Rossi, Motovario, Chiaravalli, Nissei and more.
Each replacement is evaluated model by model according to the original nameplate, drawing, mounting dimensions, shaft interface, gear ratio, torque and application conditions.
Send us your model number, nameplate photo or product images. Our engineers confirm replacement feasibility, compatibility and quotation within 24 hours.
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