Reduction Gear Overhauling

Specialists in Reduction gear Overhauling Trusted by OEMs and Class Societies

With over 200 successfully completed reduction gear overhauls, KIMI delivers high-precision engineering solutions trusted by leading OEMs, including RENK and REINTJES, and accepted by major classification societies. Our expertise is based on proven engineering know-how, advanced manufacturing capabilities, and strict quality control.

Through advanced reverse engineering, CNC machining, and in-house metallurgical expertise, we overhaul, recondition, or manufacture gears, shafts, and complete rotating assemblies to OEM-equivalent technical standards, safely restoring gearbox performance while reducing lead times and vessel downtime.

Manufacturing of primary and auxiliary shafts and gears at KIMI engineering facilities
Primary and auxiliary shafts and gears manufacturing with precision machining, certified materials, and strict dimensional control to meet OEM specifications.
Manufacturing of reduction gear components including gears pinions and shafts at KIMI
Manufacturing process of reduction gear components such as gears, pinions, and shafts with OEM quality, fast delivery, and competitive cost.
Overhaul of Renk and Reintjes reduction gear unit by KIMI engineering department
KIMI’s engineering department overhauls Renk and Reintjes reduction gear units to exact OEM operational standards.
Reduction gear overhauling process and component inspection at KIMI workshop
KIMI’s overhauling process includes detailed inspection, backlash evaluation, and full restoration of reduction gear operation.
Precision machining of reduction gear casing at KIMI engineering workshop
Precision machining of a reduction gear casing for correct interoperability between main and auxiliary shafts.
Final assembly of overhauled reduction gear at KIMI workshop
Overhauled of reduction gear on final assembly stage.
DRAG
Bull Gear Manufacturing through 5-Axis Machining – KIMI
Manufacturing of primary and auxiliary shafts and gears at KIMI engineering facilities
Manufacturing of reduction gear components including gears pinions and shafts at KIMI
Overhaul of Renk and Reintjes reduction gear unit by KIMI engineering department
Reduction gear overhauling process and component inspection at KIMI workshop
Precision machining of reduction gear casing at KIMI engineering workshop
Final assembly of overhauled reduction gear at KIMI workshop
Pinion Gear Manufacturing through CNC & Reverse Engineering – KIMI

Customer Benefits

<h3><strong>Rapid Turnaround for Overhaul and Manufacturing</strong></h3>

Rapid Turnaround for Overhaul and Manufacturing

<h3><strong>Cost-Efficient OEM Alternative</strong></h3>

Cost-Efficient OEM Alternative

<h3><strong>OEM -level Quality & Enhanced Durability</strong></h3>

OEM -level Quality & Enhanced Durability

Gearbox Overhaul & Repair Procedure

01

DISASSEMBLY & TMQA INSPECTION

Components are dismantled and evaluated through detailed condition assessment

02

REVERSE ENGINEERING & MANUFACTURING

Worn or obsolete parts are manufactured to restore OEM operational performance

03

METALLURGICAL TESTING & BALANCING

Material properties are verified and rotating parts are dynamically balanced

04

CLASS-APPROVED PRECISION REASSEMBLY

Components are assembled to exact OEM clearances, ensuring class-approved OEM-level repair

05

INSTALLATION & ALIGNMENT ONBOARD

System is installed and aligned to ensure proper operation

Read the Most Frequently Asked Questions

Why Rely on KIMI

OEM-level gearbox reconditioning with full in-house manufacturing and reverse engineering expertise.
200
+

GearBox Overhauls Delivered

100
%

In-house Manufacturing Capability

5
+

OEM expertise: RENK, Reintjes, ZF, Flender

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Beyond Conventional Marine Engine Repairs

We Restore What Others Replace
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FAQs

KIMI offers complete reduction gear overhauling, repair, reconditioning, and manufacturing services, including disassembly, inspection, reverse engineering, parts fabrication, dynamic balancing, reassembly, and onboard installation with alignment.

KIMI has proven experience with major OEM systems, including gearboxes from RENK and REINTJES, as well as other leading manufacturers. Our expertise covers a wide range of marine reduction gear applications and configurations.

Yes. Through advanced reverse engineering, CNC machining, and in-house metallurgical expertise, KIMI can manufacture gears, pinions, shafts, and complete rotating assemblies to exact OEM specifications—even for obsolete or discontinued parts.

KIMI delivers:

  • Fast turnaround and reduced vessel downtime
  • Cost-effective solutions compared to OEM replacement
  • High technical precision and engineering expertise
  • Full compliance with classification society requirements

Our integrated approach ensures reliable, efficient, and long-lasting gearbox performance.