Specialists in Propulsion Equipment Repair & Reconditioning

ONE-STOP REPAIR WORKSHOP

Your Full-Service Partner in Propulsion Repairs

Whether you're dealing with bent shafts, wear and cavitation, or damage from operational failures, our team has the expertise, equipment, and class-approved techniques to provide reliable repair solutions for your propulsion equipment.

From straightening of bent shafts to advanced welding, we restore shafts and components with class-approved precision.

We service CPP hubs, fixed propellers, hydraulic couplings, shaft seals and bearings – including coating for corrosion resistance.

Our expertise also covers gearboxes, OD boxes, and generator shafts, as well as thruster units such as Azimuth, Bow, and Tunnel Thrusters and Pods.

Welding Specialists

Repair of Propellers, Thrusters & Pods

MarineShaft specializes in repair and reconditioning of all types of propellers and thrusters. We service fixed-pitch propellers, controllable-pitch propellers (CPP), mono-block propellers, and water jets, supported by certified welders and class-approved procedures.

We deliver high-quality solutions that restore functionality and extend component service life. Our skilled welders mobilize quickly, whether the repair is performed on-site or in-house.

We apply a wide range of welding techniques, including MIG/MAG and TIG welding, as well as advanced methods such as Submerged Arc Welding, laser cladding, and micro welding.

Welding Specialists

Propeller blades, thrusters & pods

Repair Specialists:

Typical repair scope we undertake includes:

Straightening of propeller blades, mono blocks and fixed propellers
Machining of blade feet
Repair and welding of damages to CPP and fixed propellers
Casting / welding of new blade tips
Polishing of propeller blades
Balancing of blades for optimal performance
3D scanning of fixed propellers and propeller blades
3D scanning of propeller and shaft cones
Repair and overhaul of thrusters, including thruster housing

Provider of Thruster repairs

Efficient - Precise - Reliable

Additional Shaft line Repair Services:

Complete Reconditioning of Shafts

With expertise, we repair propeller, intermediate, and tail shafts using the latest technology and class-approved methods to ensure excellent shaft performance. Whether the shaft is bent, worn, or damaged due to system failures, we can provide a professional repair solution to restore full functionality, including straightening and welding.

Coating of Shafts for Corrosion Resistance

We apply high-quality coatings to your shafts, providing excellent corrosion resistance and extending the lifespan of your water-lubricated equipment in marine environments. We ensure optimal protection using the coating product Phillyclad—a non-toxic laminate resin designed for quick and thorough application. To further enhance repair processes, we use advanced laser cleaning equipment to efficiently remove coatings, rust, and other contaminants without damaging the underlying surface. This technology significantly reduces repair time and increases overall efficiency.

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Routine Overhaul and Reconditioning of Propeller Equipment

Whether you are looking for a scheduled routine overhaul or need an emergency repair service for your propeller equipment, we can provide comprehensive maintenance and reconditioning services for the entire propeller equipment. Our services include the repair of cast iron gear bearing housings and crank disc bearing surfaces, reconditioning of stainless-steel propeller hubs, and machining of glide tracks on the yoke. We also perform shrink-fitting of new bronze glide rings and bushings, repair propeller blades—including blade feet and bolt contact surfaces—and polish propeller shaft journals. Our technicians ensure that each component is carefully serviced and reassembled.

Reconditioning of Marine Shaft Sealing Systems

We offer professional reconditioning for marine shaft sealing systems, ensuring long-lasting protection against leaks, corrosion, and operational breakdowns. Our services include complete repairs for any wear or failure, ensuring that the sealing system remains leak-free and durable.

Propeller Hub Reconditioning

We repair propeller hubs made of both aluminum bronze and stainless steel, restoring them to their original performance standards. Our process includes machining the glide surfaces and blade carriers to ensure the hub is fully functional and meets class approval. By applying precise techniques, we enhance the durability and efficiency of your equipment, ensuring optimal performance.

White Metal Bearing Repair/Recasting

We repair and recondition white metal bearings using centrifugal casting or laser cladding. This process, also known as re-babbitting or re-metallic, ensures a precise and homogeneous bond between the shell and the lining. Our white metal renewal process includes ultrasonic testing to verify bonding integrity and is carried out in full compliance with class requirements. We can also offer a new manufacturing of white metal bearings.

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Manufacture of New Liners and Bushes

We manufacture custom liners and bushes in stainless steel and bronze, tailored to your exact specifications. With a large stock of raw materials readily available, we guarantee fast delivery time for all manufacturing projects.

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Hydraulic Coupling Repair or Manufacturing

Whether you need hydraulic couplings repaired or replaced, we have the expertise to manage the task efficiently. Our services include comprehensive inspection, testing, reconditioning, and class approved welding techniques. If replacement is the option, we can manufacture a new coupling with short delivery time.

Gearbox Overhaul & Repair

We offer repair and overhaul of marine gearboxes using advanced repair methods and class approved procedures. Gearboxes are critical for power transmission and propulsion control, and even minor wear can affect performance. Our repair process restores full functionality and dimensional accuracy. We can also offer new manufacturing of gearbox components if required.

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3D Scanning for Propulsion Equipment

WHEN EXPERTISE MATTERS

Additional Services

Case study: Cylinder Cover Repair

Repair on a Cylinder Cover Ø1800 mm and Weighing 7450 kg

Our repair work consisted of machining the inner and outer glide surfaces of the propeller hub, as well as machining the four-blade carriers.

Class-approved by DNV and carried out in 3 running days, working around the clock.

Afterwards, we supervised and assisted with on-site installation of the propeller hub, hub cylinder, and propeller blades, including testing and validating propeller blade pitch.

supervision and assisted with onsite installation

Case study: Full scope shaft line repair including installation

Bearing Failure Caused Misalignment and Damage to the Propeller Equipment

We conducted repair of the propeller equipment from an offshore supply vessel after inspection and alignment tests, including in-situ reinstallation and alignment.

Repair of shaft line, including bearings and hydraulic coupling. The propeller shaft and two intermediate shafts were cold straightened, and bearing journals were restored. The flange bolt holes of the intermediate shaft were reconditioned, and we manufactured 20 new bolts to fit the repaired flange bolt holes.

Sterntube bearing repair. Re-casting of white metal and remachining with internal offsets to correct the misalignment in the stern tube housings. Intermediate bearing housings were refurbished with new shells, and the worn seal surfaces were re-machined.

On-site offset alignment: Laser measurements of misalignment of the existing stern tube bearing housings. These measurements were adapted to the final machining of the re-casted existing stern tube bearings.

Installation and alignment: Final installation and alignment of the repaired shaft line equipment, including mounting of the hydraulic coupling, and assembly of the propeller. A final jack-up test, witnessed by the class, confirmed that the shaft line was restored within required tolerances.

Case study: Ugent shaft repair for polar vessel

Repair time just 4 days

Case study: Urgent shaft repair for polar vessel

Deflection was found in the push rods of the National Geographic Explorer during dry dock.

MarineShaft received the 12-meter-long rods at our workshop in Hirtshals, where we completed the following within just 4 days, fully class approved: