REINTJES

What REINTJES does

REINTJES GmbH is a privately held German manufacturer of customized marine gearboxes and propulsion systems, headquartered in Hameln and operating globally via 11 wholly-owned subsidiaries and a network of service partners. Founded in 1879 by Theodor Reintjes and owned by the Eugen-Reintjes-Stiftung foundation, the company has built more than 145 years of specialized engineering know-how, producing roughly 1,000 gearboxes per year for yachts, ferries, work vessels, offshore support ships and naval applications. Its core hardware portfolio comprises three marine gearbox families (LAF, VLJ, WAF), supplemented in recent years by hybrid and full-electric ship drives delivered through subsidiary REINTJES Hybrid Power (RHP), plus a proprietary XXL additive-manufacturing process for large gearbox housings that achieved 41% energy savings and 36% weight reduction in pilot builds.

The commercial strategy is built on direct enterprise field sales supported by an in-house technical academy, a gearbox configurator, and a Digital Portal for spare-parts ordering and asset-record management. Revenue is generated primarily through custom-engineered hardware sales (mechanical, hybrid and electric propulsion systems) combined with an expanding after-sales service stream that supplies maintenance, overhauls, and spare parts through the global subsidiary footprint — a recurring-revenue layer that overlays the long-lifecycle installed base. Reported group revenue was approximately €138 million in 2025 (up from €135M in 2024 and €74M in 2021), with profit of €11.6M, and the company is investing its growth in hybrid/electric propulsion, digital gearbox automation (GBXA), and continued R&D partnerships for advanced manufacturing.

Name

REINTJES

Legal name

REINTJES GmbH

Website

https://reintjes-gears.de

Company type

Private

Founded year

1879

Operating status

Operating

Headcount range

251–500 employees

Short description

REINTJES is a German, privately held manufacturer of customized marine gearboxes and propulsion systems, serving shipowners, yacht builders, ferry operators, and offshore vessel operators worldwide through 11 subsidiaries and a global service network, with about 1,000 gearboxes produced annually.

Ownership category

akta.pro rank

Product category

Marine Propulsion Systems

NAICS

Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing (333612)

SIC

Engines & Turbines (3510)

akta.pro primary industry

Propulsion Drives, Gearboxes & Shaftlines (IMAJAHAD)

akta.pro secondary industries

Marine Hybrid & Electric Propulsion Systems (IMAJAHAC), Propulsion, Power & Energy Systems Design (Diesel, Hybrid, Electric, Alternative Fuels) (IMAJAGAE), Propulsion MRO, Spares & Field Service (Overhauls, retrofits, upgrades) (IMAJAHAN)

Keywords

• Marine gearboxes
• Ship propulsion systems
• Hybrid marine drives
• Marine power transmission
• Vessel propulsion manufacturing

Headquarters

HQ city

Hameln

HQ country

Germany

HQ region

Europe

Offices10 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Technology or R&D, Supply Chain, Marketing or Sales, Infrastructure

Revenue model

1. Ship Gearbox Manufacturing: REINTJES develops and manufactures customized ship gears for all vessel types including yachts, ferries, and work vessels. The company sells approximately 1000 gearboxes per year. Products include mechanical, hybrid, and full-electric propulsion systems.
2. After-Sales Service and Spare Parts: REINTJES has invested in building a dedicated spare parts warehouse and is transforming its service division from classical service toward comprehensive after-sales support, including maintenance, overhaul, and repair services for its global customer base.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

REINTJES develops and manufactures customized ship gears (marine gearboxes and propulsion systems) for all vessel types including yachts, ferries, work vessels, and offshore vessels. The product portfolio covers mechanical, hybrid, and full-electric propulsion systems in three core series (LAF, VLJ, WAF), complemented by Gearbox Automation (GBXA) digital integration, an online Gearbox Configurator, and a global after-sales service network spanning 11 subsidiaries.

Product overview

REINTJES develops and manufactures customized marine and industrial gearboxes from its headquarters in Hameln, Germany. The core product portfolio comprises three main gearbox series: LAF (light-duty marine applications), VLJ (versatile light-duty), and WAF (heavy-duty marine). Beyond traditional mechanical transmissions, REINTJES has expanded into hybrid and full-electric ship propulsion systems as part of its sustainable technology strategy. The product lineup includes Gearbox Automation solutions for digital integration and autonomous vessel applications. Supporting the hardware products is a digital ecosystem comprising the Gearbox Configurator for online product selection and a Digital Portal for spare parts ordering and service record management. The company also offers comprehensive aftersales service through its global network of eleven subsidiaries and numerous service partners.

Differentiator

Problem solved

Functional benefit

Products and services

• LAF Series Marine Gearboxes A comprehensive series of marine reduction gearboxes designed for various vessel propulsion applications, including single and multiple propulsion systems. Available in multiple sizes with different power ratings and reduction ratios, serving light-duty marine applications.
• VLJ Series Marine Gearboxes Versatile marine gearboxes suitable for light to medium-duty applications across different vessel types, with a compact design and various ratio options for different propulsion configurations.
• WAF Series Marine Gearboxes Heavy-duty marine propulsion gearboxes engineered for larger vessels requiring higher torque capacity and robust construction for demanding maritime operations and work vessels.
• Hybrid Ship Drives Hybrid propulsion systems combining traditional combustion engines with electric power for enhanced fuel efficiency, reduced emissions, and flexible operational modes including generator-off operations. Deployed for example on the Penguin International 'Pelican Peace' crewboat with 232 kWh battery energy storage.
• Full-Electric Ship Drives Complete electric propulsion systems for vessels enabling zero-emission operations, full-electric sailing capabilities, and extended battery-powered hotel load support.
• Aftersales Service Comprehensive service offering including maintenance, general overhaul, repairs, and spare parts supply for REINTJES gearboxes, delivered through 11 subsidiary companies and numerous service partners worldwide. Backed by a dedicated spare parts warehouse.
• Gearbox Configurator Online selection tool allowing customers to input parameters such as power, speed, and propulsion requirements to identify suitable marine gearbox models from the REINTJES portfolio (LAF, VLJ, WAF and related series).

Quantifiable outcome

• 41% energy savings achieved with XXL 3D printed gearbox housing compared to conventional manufacturing
• +4 more outcomes

Named customers1 record

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• Penguin InternationalcoreStrategic or Co-development Partner · 26 March 2026REINTJES partnered with Penguin International to develop the 'Pelican Peace' full-hybrid crewboat. REINTJES provided propulsion technology for this 42-meter multirole vessel featuring a true parallel hybrid architecture with 232 kWh battery energy storage system.
• TEWISS – Technik und Wissen GmbHcoreStrategic or Co-development Partner · 1 January 2019Partner in the XXL 3D printing research project (2019-2023) funded by the German Federal Ministry for Economic Affairs and Climate Action. TEWISS contributed expertise in technology development for additive manufacturing of large-scale ship gearbox housings. Total project budget was 3.36 million euros.
• Laser Zentrum Hannover e.V. (LZH)coreStrategic or Co-development Partner · 1 January 2019Research partner in the XXL 3D printing project, providing laser technology expertise for additive manufacturing of large-scale components.
• IPH – Institut für Integrierte Produktion Hannover gGmbHcoreStrategic or Co-development Partner · 1 January 2019Research partner in the XXL 3D printing project, contributing integrated production expertise.
• Eilhauer MaschinenbaucoreStrategic or Co-development Partner · 1 January 2019Partner in the XXL 3D printing project, contributing mechanical engineering expertise.
• Technische Universität ChemnitzcoreStrategic or Co-development PartnerFull partner in the 'Big InTension' follow-up project to the XXL 3D printing initiative. Project leadership lies with REINTJES, with project funding through Projektträger Jülich.
• ARC Solutions GmbHminorStrategic or Co-development PartnerFull partner in the 'Big InTension' XXL 3D printing follow-up project.
• Mecklenburger Metallguss GmbH (MMG)minorStrategic or Co-development PartnerAssociated partner in the 'Big InTension' XXL 3D printing follow-up project.
• ECOROLL AG WerkzeugtechnikminorStrategic or Co-development PartnerAssociated partner in the 'Big InTension' XXL 3D printing follow-up project.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• ZF Friedrichshafen (ZF Marine): ZF Marine is one of the world's largest marine gearbox and propulsion system manufacturers, offering a comparable product portfolio of mechanical marine transmissions for yachts, commercial vessels, and workboats. It is the closest direct competitor to REINTJES' core LAF, VLJ, and WAF gearbox series.
• RENK Group: RENK manufactures marine and industrial gearboxes and propulsion systems, directly competing with REINTJES in ship gears for naval, commercial, and specialized vessels. Like REINTJES, it serves demanding defense and commercial customers with high-torque gearbox technology.
• David Brown Santasalo: David Brown Santasalo designs and manufactures industrial and marine gearboxes, including custom-engineered gear units for marine propulsion and offshore applications. It is a direct comparable in custom-engineered heavy-duty marine gear manufacturing.

Broad incumbents

• Wärtsilä: Wärtsilä is a global leader in marine engines, hybrid propulsion systems, and lifecycle services for the maritime industry. It competes with REINTJES in hybrid and full-electric marine propulsion while offering a much broader portfolio of engines, integrated systems, and digital services.
• MAN Energy Solutions: MAN Energy Solutions manufactures large two-stroke and four-stroke marine engines and propulsion solutions, including hybrid and dual-fuel systems. It is a broad incumbent whose marine engines pair with gearbox systems like those REINTJES supplies.
• Caterpillar Marine: Caterpillar's marine division supplies marine engines, propulsion, and generator sets across yacht, commercial, and offshore segments. It competes with REINTJES in integrated propulsion packages for workboats, yachts, and offshore vessels.
• ABB Marine & Ports: ABB is a leading supplier of electric, hybrid, and digital propulsion solutions for ships, including Azipod drives and energy storage. It is a broad incumbent in the same full-electric and hybrid marine propulsion segment where REINTJES is investing.
• Kongsberg Maritime: Kongsberg Maritime provides hybrid and electric propulsion systems, automation, and digital solutions for commercial vessels. It competes with REINTJES' hybrid/electric and Gearbox Automation (GBXA) product lines in the maritime energy-transition segment.
• Siemens Energy (Marine Electrification): Siemens Energy supplies electrical propulsion, drives, and power management systems for naval and commercial ships, overlapping with REINTJES' full-electric and hybrid marine drive portfolio. It is a much larger broad incumbent.

Others

• Boston Gear / Altra Industrial Motion: Altra Industrial Motion (parent of Boston Gear, Nuttall, etc.) produces industrial gears, gear drives, and power transmission components for marine, energy, and industrial markets. It is a broader industrial gear competitor with some marine exposure.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/REINTJES.GmbH
• LinkedInlinkedin.com/company/reintjes-gmbh
• Instagraminstagram.com/reintjesgears
• Xx.com/reintjes_group

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Subsidiaries8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about REINTJES