Corrosion Protection

Ecospeed is ultra strong and resilient and is probably the best possible protection against
corrosion available today.
• Hard, tough, glassflake-based
• Flexible, very strong adhesion, thick coating
• Impermeable and impenetrable
Applied to rudders and underwater gear, Ecospeed’s tougher variant Ecoshield even puts an end to rudder cavitation damage.

Crane & Winch

RENK offer a wide range of couplings for this application. Please see the Products-folder for more info.

Fish Farming

The stabilizer tank and the free power generator from GEPS Techno are ideal solutions for feeder barges etc. With the GSIRE installed, it will make the platform more stable, as well as having free power from a wave driven generator on board. This does also apply for fish farming ships, fish carriers or fishing vessels.  The stabilised buoy WAVEPEARL® provides permanent electric supply and creates good working conditions. 

Gear Units for Yachts

High-end reduction gear systems are consisting of a number of high accuracy components. Decades of experience, the latest design and production methods and quality without compromise for gears, bearings, casing structures, clutches and controls are the base of
any Megayacht gear system delivered by RENK.
All type of specially configured Megayacht gears include reduced noise radiation measures adjusted to specifications. Even the “super silent gear” is available from RENK.

Hull Cleaning

The unique design of the Subsea Industries series of underwater hull cleaning units provides the efficiency and durability demanded by the harsh underwater environment. All systems are carefully constructed so that no damage will occur to those hull coatings which are suitable for underwater cleaning, while still completely removing all types of fouling. If the vessel is coated with Ecospeed, this restores the vessel’s performance and offers shipowners considerable savings in fuel.

Marine Propulsion

RENK is a widely recognized supplier of Marine Gear Units worldwide.
* RENKs Single and Double Marine Gear Units are typically installed in ferries, LNG tankers, anchor handlers and seismic vessels.
* RENKs Tunnel Gears and Propeller Shaft Clutches can be found in vessels with two-stroke engines i.e. chemical tankers. 
* Some Norwegian key customers include Color Line, Fjordline and Fred Olsen.



Couplings to different kinds of mining equipment; from for example conveyor belts for gravel – to large mining machines that crush blocks of stone to gravel by tumbling.


RENK has supplied several Curved Tooth Couplings and Slide Bearings for the offshore industry.

Propeller Buffing

Hydrex have developed a new approach to propeller cleaning that won the National Energy Globe Award for 2017. They discovered that more frequent, lighter cleaning of the propeller using a different tool to a grinding disk, and catching the propeller before a calcareous layer builds up is actually the optimum approach to propeller cleaning. If done right and done regularly it can result in 5% or even more fuel savings.
Obviously for a ship that has even a medium level of fuel consumption, these savings far outweigh the cost of the propeller cleaning itself. Because the propeller is being cleaned regularly, the cleaning is relatively light and quick. No material is ground away, which is good for the propeller and the environment. The propeller is kept in an ultra-smooth condition (Rubert A or A+) and that is where the real fuel savings can be achieved. This finish can only be accomplished with in-water propeller cleaning.
Approved propeller blade cleaning is carried out by our divers using underwater equipment developed in-house by our R&D department. This process is fast and easy and has no effect on the underwater environment.
Many of Hydrex customers who have availed themselves of this service have noticed a remarkable difference in their fuel efficiency after each cleaning.

Pulp & Paper

Different Couplings can be found for example in wood chipping machines and machines for paper and packaging manufacturing.

Railway applications

RENK Coupling Solutions for Railway Applications are known for:
• 30 years of experience in the development and production of couplings for railway applications
• Currently operating in diverse types of trains and locomotives
• Dependable torque transmission under all operating conditions

Rudder Protection

Subsea Industries, a Hydrex company, has developed the ultimate rudder protection coating, Ecoshield, for permanent protection against cavitation damage for rudders. The glassflake reinforced coating protects the rudder for the service life of the ship without need for recoating or major repair and comes with a ten-year guarantee.

Ship Hull Performance

Ecospeed is a system for ship hull protection and fouling control which results in the
smoothest hull for the longest time and therefore the highest fuel economy for the service life
of ships.

Ship Stabilization

The SIRE from GEPS Techno stabilizes your ship and improves sea-keeping and working conditions on board. SIRE is a passive ship stabilisation system that reduces the ships roll in all sea conditions.
The GSIRE is a semi-passive stabilizer which recovers energy from the roll and returns it to your onboard electrical network. The GSIRE application is a SIRE type passive anti-roll stabilisation system integrating water turbines to recover stabilisation power from the water load in motion.

Waste Heat Energy Recovery

Orcan Energy's simple and flexible products convert unused energy from engines and industrial facilities into clean electricity that you can use right away. Without any extra investment or extra work. 

Water Power / Hydro Electric Installations

For Kaplan-turbines RENK can provide Planetary Gear Boxes and Parallel Shaft Gears. They also supply Axial and Radial Bearing Units for both horizontal and vertical installations.
For Pump-fed Power Stations, RENK produce Curved Toot Couplings that can be disengaged at Standstill.

Wind Power

For wind power stations our products include Gear Units (AeroGear), Steel Disk Couplings and Emergency Couplings (Hyguard).


Couplings are used in special vehicles, special machines, test rigs etc.