Gearbox Solutions for Industry and Marine
Gearbox Expertise That Drives Performance
Bilfinger offers world-class gearbox solutions for industrial and maritime applications with over 150 years of experience. We are the original equipment manufacturer (OEM) of brands like Stork and Rademakers. Also, we are the only official authorized service partner for Jahnel-Kestermann gearboxes (JaKe) worldwide.
We deliver unmatched expertise across the full lifecycle of gearboxes. From diagnostics and design to repair and upgrades, our integrated services ensure peak performance, minimized downtime, and cost-effective execution. Whether you operate in Oil & Gas, Power, Chemicals, or Maritime, our engineers are ready 24/7 to support your operations with fast, reliable, and tailored gearbox services. We combine deep technical knowledge with cutting-edge facilities to keep your assets running smoothly, anywhere in the world. At an unrivalled speed, servicing clients globally from workshops in The Netherlands and Singapore.
New Build Gearboxes: Custom Solutions, Fast Delivery
When standard gearboxes don’t fit your application, Bilfinger designs and manufactures custom-build gearboxes that integrate seamlessly into your system. As OEM for several renowned brands - Stork, Rademakers, Jahnel-Kestermann, Kuypers, Brevo and Conrad - we hold complete design specifications and use advanced software tools (e.g., Kisssoft, Siemens NX, Madyn 2000) to deliver gearboxes that meet ISO, API, AGMA and other standards, including the possibility of approval from all mayor classification companies like American Bureau of Shipping (ABS), Bureau Veritas (BV), DNV, Lloyd's Register, ClassNK, and RINA.
Our engineering team works closely with you to ensure optimal performance, reliability, and compliance. With flexible manufacturing capabilities and fast turnaround times, we provide tailor-made gearboxes for both industrial and maritime environments, without compromising quality or lead time.
High-speed Gearbox Solutions - Engineered for Reliability
Bilfinger is a trusted specialist in the engineering, reverse design, inspection, and repair of high-speed turbomachinery gearboxes serving the oil & gas, offshore, maritime and industrial sectors. High-speed gearboxes with parallel shafts, epicyclic and integrally geared arrangements in single helical with(out) thrust collars or double helical design.
Leveraging OEM expertise from renowned brands like Rademakers and advanced precision machining capabilities, Bilfinger delivers maximum reliability and performance for gearboxes operating under high rotational speeds and demanding operational conditions.
Our engineered solutions handle rotational speeds up to 60,000 RPM, power outputs up to 80 MW, and gear pitch line velocities up to 160 m/s.
As the original equipment manufacturer (OEM) of Rademakers high-speed gearboxes, Bilfinger combines decades of engineering heritage with full access to original design data, calculations, and technical drawings. This ensures precise support for both legacy and newly commissioned units, fully aligned with the internationally recognized standards outlined in the “Standards we work by” section.
With a large installed base of Rademakers gearboxes still operating reliably for more than 40 years, Bilfinger offers unmatched insight into long-term durability, lifecycle optimization, and maintenance strategies. Our deep understanding of gearbox design, including compliance with ISO, AGMA, and API, enables us to deliver new-build solutions that meet the highest expectations for performance and reliability.
Bilfinger operates in full compliance with internationally recognized standards for High-speed gearbox design, repair, and damage assessment ensuring precision, safety, and long-term reliability for your gear unit.
⚙️ Gear(Unit) Design Standards:
- ISO 13691 - Petroleum and natural gas industries – High-speed special-purpose gear units
- AGMA 6011 - Specification for high-speed helical gear units
- API 613 - Special purpose gear units for petroleum, chemical and gas industry services
- API 671 - Special purpose couplings for petroleum, chemical and gas industry services
- API 617 - Axial and centrifugal compressors and expander-compressors for petroleum, chemical and gas industry services.
- API 672 - Packaged, integrally geared centrifugal air compressors for petroleum, chemical and gas industry services.
- Stoeckicht philosophy for high-speed epicyclic gear units
🔧 Gear(Unit) Repair Standards:
- API 686 - Recommended practice for machinery installation and installation design
- API 687 - Rotor repair
🛠️ Damage assessment:
- ISO 10825 - Wear and damage to gear teeth
- AGMA 1010 - Appearance of gear teeth – terminology of wear and failure
- ISO 7146 - Appearance and characterization of damage to metallic hydrodynamic bearings
- ISO 15243 - Rolling bearings – damages and failures
Bilfinger offers three structured inspection levels for high-speed gearboxes, each designed to provide progressively deeper insights into gearbox condition and performance. All inspection activities are aligned with API 687 guidelines and executed in accordance with the international standards outlined in the “Standards we work by” section.
Level 1 Inspection
- Visual assessment of gearbox housing, piping, oil seals and internals
- Identification of leakage, visible wear or damage
- Ideal for routine checks or pre-shutdown evaluations
- Performed on-site or at our Bilfinger Gears & Services workshops
Level 2 Inspection
- Includes all Level 1 visual checks plus dimensional measurements and runouts
- Non-destructive testing, dynamic balancing and test-run
- Detects early-stage wear, misalignment, and contamination
- Supports scheduled maintenance planning
- Performed on-site or at our Bilfinger Gears & Services workshops
Level 3 Inspection
- Complete teardown and analysis per API 687
- Includes all Level 2 activities plus extended measurements and reporting
- Comprehensive Gear tooth evaluation incl. profile and tooth trace modifications
- Provides a full health profile and remaining life assessment of the gearbox
- Damage evaluation performed by certified specialists using standards such as:
- ISO 10825 – Gear tooth wear and damage
- ISO 7146 – Hydrodynamic bearing damage
- ISO 15243 – Rolling bearing failure modes
Performed at our Bilfinger Gears & Services workshops
Where required, inspection findings can be seamlessly integrated with our “Reverse Engineering” capabilities, enabling precise restoration or redesign of worn components based on wear pattern analysis, OEM specifications, and advanced engineering calculations.
For all inquiries, requests, or quotations, we kindly invite you to contact our team directly:
Rotterdam: +31 88 089 1110 - Email: info.gears.bgsb@bilfinger.com
Singapore: +65 6863 0878 - Email: info.gears-sg.bgsb@bilfinger.com
Or complete the High-Speed Gearbox Questionnaire via the QR code (click or scan) provided. The questionnaire ensures we receive all relevant technical details promptly and can offer you the most accurate and efficient support.
Inspection, Overhaul & Repair: Minimize Downtime
Bilfinger delivers comprehensive gearbox services designed to minimize downtime and maximize reliability. Our repair portfolio includes diagnostics, videoscopic inspections, vibration analysis, and full test runs. Whether on-site or in our state-of-the-art workshops, we offer visual and dimensional inspection, overhaul, repair, reverse engineering, and alignment services.
Our Field Service teams operate globally and are available 24/7 to respond quickly and effectively. With over 4,500 inspections performed and decades of experience, we provide brand-independent repairs that restore your gearbox to optimal condition: fast, safe, and reliable. From emergency troubleshooting to planned maintenance, our mobile engineers bring expertise and equipment directly to your site, ensuring seamless service wherever you operate.
Also for these services approval from all mayor classification companies like Bureau Veritas (BV), DNV and Lloyd's Register is possible.
Spare Parts: Fast, Reliable, OEM-Quality
Need spare parts urgently? Bilfinger offers rapid, in-house production of gearbox components, even when original makers (OEM's) can’t deliver. We 3D-scan, reverse-engineer, and manufacture parts using state-of-the-art 5-axis CNC machines, specialized gear cutting and grinding machines, ensuring OEM-level quality and compatibility.
Whether your original supplier no longer exists or quotes excessive prices, we provide a cost-effective alternative with the shortest lead times. Our extensive inventory and flexible machining capabilities allow us to respond quickly to any situation, helping you avoid costly downtime and keep your operations running.
As the original manufacturer of Stork, Rademakers and Jahnel Kestermann gearboxes, Bilfinger offers direct access to legacy design data, technical drawings, and calculation models. This ensures that replacement components are built to exact original specifications, guaranteeing full compatibility and long-term reliability. We are able to provide these services with approval from all mayor classification companies, like American Bureau of Shipping (ABS), Bureau Veritas (BV), DNV, Lloyd's Register, ClassNK, and RINA.
Reverse Engineering: Smart Solutions for Obsolete Gearboxes
When original documentation is missing or OEM support is unavailable, Bilfinger’s reverse engineering capabilities offer a reliable path forward. Our engineering team uses advanced 3D scanning, modeling, and analysis tools to recreate gearbox components with precision, often improving upon the original design, when upgrades are needed. Whether it’s a worn gear, housing, or shaft, we can replicate and manufacture parts in-house using state-of-the-art CNC machinery.
This service is ideal for obsolete systems or models, or urgent repairs. Combined with our deep technical expertise and OEM heritage, reverse engineering allows us to restore functionality, extend equipment life, and reduce costs, without compromising quality or performance.
All reverse engineering activities are performed with precision tools and expert insight to ensure full compatibility with OEM specifications and operational requirements. Some specifications:
- 3D scanning of components
- Component measurements
- Material analysis
- Wear pattern analysis in order to reverse engineer components back to OEM specification
- Gear teeth profile and tooth trace measurements
- Shaft journal measurements
- Hydrodynamic journal bearing geometry, profile and details measurement
- Conical couplings and interference fits
- Hirth serration measurement
- Casing bores measurements
- Shaft alignment
- Gear Design Calculations incl. Tooth Profile and Tooth Trace Modifications to compensate for bending and torsional deformations and thermal distortion.
- Shaft Strength and Fatigue Analysis
- Hydrodynamic Journal Bearing Evaluation
- Conical and Cylindrical Interference fits
- Rotor Dynamics
- Lubrication system sizing and analysis
- Creation of new 3D CAD models and technical drawings
- Optional design improvements for enhanced performance
- We are able to provide reverse engineering services with approval from all mayor classification companies, like American Bureau of Shipping (ABS), Bureau Veritas (BV), DNV, Lloyd's Register, ClassNK, and RINA.
- KISSsoft Gear, shaft and roller bearing calculations
- Siemens NX Parametric 3D CAD models and technical drawings
- Madyn 2000 Rotor dynamics and hydrodynamic journal bearing calculations
