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Custom Heavy Duty Industrial Gears and Gearboxes
We provide custom industrial gears and gearboxes for steel mills, heavy machinery, energy, material handling systems, and shipbuilding industries. Our major clients include Mitsubishi Electric, OTIS, POSCO, Hyundai Steel, TKE, Fives Group, and Nippon Steel.
We are capable of delivering fully customized designs that meet the most demanding product specifications and performance requirements, including applications operating in extreme service environments. With more than 35 years of industry experience, we have built an extensive portfolio of project references across multiple sectors. Our capabilities are further supported by 34 registered patents and a wide range of international certifications.
Types of Gears
| Gears | GEAR TYPE | GRADE | CAPACITY | Heat Treatment Method |
|---|---|---|---|---|
 | SPUR GEAR | AGMA 10~13 | Φ30mm ~ Φ2.500mm | QT, CARBURIZED, INDUCTION HARD |
| GIRTH GEAR | AGMA 7 or lower | Φ30mm ~ Φ12,000mm | QT, INDUCTION HARD - OD Max.Φ3.000mm. | |
 | HELICAL GEAR | AGMA 10~13 | Φ30mm ~ Φ2.500mm | QT, CARBURIZED, INDUCTION HARD |
 | STRAIGHT BAVEL | AGMA 8 or lower | Φ50mm ~ Φ1.000mm | QT, CARBURIZED, INDUCTION HARD |
| SPIRAL BEVEL | AGMA 10~13 | Φ50mm ~ Φ1.600mm | QT, CARBURIZED, INDUCTION HARD | |
 | WORM SHAFT | AGMA 10 | Center distance 80mm ~ 450mm | QT, CARBURIZED, INDUCTION HARD |
| WORM WHEEL | AGMA 7 or lower | Center distance 80mm ~ 450mm | - |
Custom Industrial Gearbox Specification :
- Size: Max 40ton
- HP: 4,000kw
- RPM: Max 3,000
- Back-Lash: AGMA 13 or lower, DIN 4 or lower
- Noise Level (No-Load Operation): Under 72dB
- Shaft Configuration: Right-Angle, Parallel, and Concentric
Custom Industrial Gearboxes in Steel Mill Industry
LPR Global offers a wide range of steel mill equipment to equipment components such as forged/centrifugally casted rolls, hydraulic cylinders, hydrodynamic bearing, cut-to-length line, air knife systems, other steel mill equipment and custom industrial gearbox. With our deep understanding in steel mill industry, we offer reliable solutions to meet the operational requirements of extreme service environment.
POSCO Hot Leveller Custom Industrial Gearbox
POSCO – BD Mill Pinion Stand 4000kW
POSCO Pinion Stand M45 Tooth
TANAKA MAINTE(JAP) – ROLLING MILL NO.1~10
VULCAN G. STEEL(OMAN)-BRIQUETTING M/C NO.1~6 30TON
SEAH STEEL – SPRIAL PIPE MILL DRIVE & END FACING M/C
KAWASAKI(JAP) – CRM PAY OFF REEL & TENSION REEL
NIPPON STEEL/KASHIMA – NO.1,2 LOOPER
Advanced Engineering Capabilities and State of the Art Manufacturing Facilities
Facilities & Engineering Capabilities:
LPR Global is equipped with state of art the manufacturing facilities. Our general process includes hobbing, milling, and griding. Our CNC machines ensure high precision gears to meet or exceed industry standards, AGMA and ISO.
GEAR GRINDING M/C
- HELIX 700
- Tooth Grinding
- Max Φ400 (High weight available)
GEAR GRINDING M/C
- KX 500 FLEX
- Tooth Grinding
- MaxΦ500
WORM HOBBING MC
- TP 1200
- Tooth hobbing
- Max Φ600 (approx.)
HELICAL HOBBING M/C
- JEIL MACHINE
- Tooth hobbing
- Max Φ450 (approx.)
COORDINATE MEASURING M/C (CMM)
- MHB121510 N
- Measurement of 3D size and position
- X=1200,Y=1500,Z=1000 / Max 2500kg
CYLINDRICAL GRINDING M/C
- GU35 H
- CYLINDRICAL GRINDING
- MAX Φ350 x 1100L
MACHINING CENTER TOOL (MCT)
- ACE-HM 800
- Case Processing/Drilling, milling, tapping, etc
- Max size . 800×800
WORM GRINDING M/C
- MKG-1500K
- Worm gear grinding
- Max Φ200 x 1200L (approx.)
Custom Industrial Gearboxes: Engineering Capabilities
LPR Global is equipped with extensive in-house engineering capabilities and experiences. We utilize the following software for product development, and prototyping through 3D and structural data analysis and simulation.
Custom Industrial Gearboxes: QC Process
LPR Global delivers reliable custom industrial gearbox solutions supported by rigorous quality control procedures and state of the art testing equipment. Our facilities are equipped with high precision CNC gear measurement systems, reducer performance test benches that help achieve near zero backlash, and a range of durability testing equipment designed to simulate different service conditions and operating environments.
Our typical process is as follows:
- Material Test
- Chemical & Mechanical Property – Mill Sheet
- Heat Treatment inspection
- Visual Inspection
- NDT: Magnetic Test
- Dimensional inspection
- Partial Assembly, match mark
- Functional (No Load) Test
- Performance Tests: Noise, Vibration, and Temperature
- Back-lash, and tooth contact test
- Lubrication test
- Paint inspection
Business Case: Pneumatically Actuated Shiftbox
Background: New System & Design
As part of a broader modernization initiative, the client was replacing outdated tube mill equipment with upgraded systems to improve performance and operational precision. During this process, they developed a new actuator system designed to control the precise speed of planetary gearboxes.
While motor driven actuation systems are the standard approach in South Korea, the client required a pneumatically controlled solution. We successfully engineered and delivered a fully functional pneumatic actuator solution that met all technical and operational requirements.
Challenges:
- Custom Design Based on Specifications
- Client required a new system to replace an old gearbox with a central shiftbox that precisely controls four planetary gearboxes. The actuator system had to be designed from the ground up to align with the new specifications and interface properly with adjacent systems.
- Maintenance Requirements: The client emphasized long term maintainability. Through multiple technical discussions, we worked closely with the client to optimize the design, focusing on a secure lubrication system and improved accessibility to the gearbox housing. The final design ensured easier servicing and reduced downtime.
- Free Issued Components, Motor and Connecting Gearbox: The client had purchased the motor and connecting gearboxes from another overseas supplier.
- We modified the shiftbox design to allow disassembly and reassembly on site, facilitating installation and handling.
- The design was further adjusted to meet the specifications and interface requirements of the connecting gearbox.
- Alignment, dimensional compatibility, and coupling conditions were carefully reviewed to ensure proper integration.
The project was executed successfully and met the client’s performance and integration expectations.
Business Case: Retrofit Engineering Tube Mill Expansion
Background: Replacing/Upgrading Old Gearboxes
A U.S.-based industrial engineering company specializing in the design, manufacture, and supply of equipment for processing and finishing metal tubes, pipes, and bars needed to renew its client’s existing tube mill equipment. As part of the modernization effort, the end user sought not only replacement but also performance improvements through upgraded specifications.
However, the original system drawings were no longer valid, as the new requirements required customization to meet updated specifications.
Challenges:
- Engineering: The client did not have an existing drawing of the gearbox. Instead, they provided a referential drawing from a previous plant along with required performance specifications.
- These gearboxes required a custom design incorporating two different motor input speeds, configured with both top and base inputs, and capable of operating under two separate conditions. In addition to motor input specifications, the following data was provided: shift ratio, nominal roll drive diameter, primary/secondary gearbox ratios, overall ratio, and total connected HP.
- Based on the provided data, we developed a new gearbox design, including updated drawings, revised material selection, and optimized dimensions.
- One of the primary engineering challenges involved achieving the required safety factor while maintaining dimensional compatibility with the existing equipment. On-site space constraints limited how much deviation from the original gearbox footprint was permissible, making structural reinforcement and internal optimization particularly critical.
We can integrate global branded components to locally sourced brands and in-house ability to provide 2D/3D Drawings in dual dimensions. You don’t have a drawing? That’s okay, please fill out this datasheet.