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KTR Kupplungstechnik Marine Couplings

KTR’s marine couplings are used worldwide and in various applications. These include main and auxiliary drives and every kind of deck equipment, such as ballast pumps, windlasses and high-load cranes.

Couplings for water jet drives

KTR offers couplings for water jet drives. Low draught, greater manoeuvrability, higher speed, reduced threat of injury, better machine protection (no damage to drives when getting dry), less vibration and smoother running are among the benefits of water jet drives.

Marine mechanical engineering coupling

KTR has a coupling solution suitable for multiple applications: the double-cardanic RADEX-N composite, a special type of the RADEX-N steel lamina coupling that has proven its importance in mechanical engineering. Its extremely stiff laminas made from stainless spring steel allow the coupling to compensate for high displacements with low restoring forces.

The RADEX-N composite coupling has a special feature: the CFK spacer. It bridges long distances between the driving shaft and impeller without any additional bearing.

Navigating, manoeuvring and tranversing couplings for bow thrusters

The majority of freight and passenger vessels as well as an increasing number of yachts are equipped with bow thrusters or transverse rudders for better manoeuvrability in harbours.

Transverse rudders are usually driven by a complex combination of electric motors and angular gears. The ROTEX couplings’ damping torsional vibrations have proven their worth on such applications.

Shock and vibration-dampening couplings

The ROTEX coupling is mounted accurately between motor and gearbox. Due to its short design it is quite easy to assemble and disassemble. It is also totally maintenance-free.

The ROTEX dampens all shocks and vibrations that result from the operation of the rudder. It also reliably compensates for axial, radial and angular displacements, which results in a longer service life for drive components.

Couplings for azimuth drives

For the propeller unit in the azimuth drive driven by an electric motor, the use of a ROTEX coupling in combination with a KTR-SI overload system is recommended. This combination protects the gearbox of the propeller unit against high-torque shocks and increases the service life of the drive system, especially if the steering unit collides with the seabed. An example of this is when the vessel is manoeuvring in shallow water.

Clamping sets

Using the CLAMPEX KTR 400 and 402 clamping sets will help keep your ship on course. These products have been developed, in particular, for high loads, high alternating torques and high torsional forces. The non-positive shaft-hub connection has been designed for large shaft diameters up to 400mm and is able to transmit much higher torques and axial forces than a positive-locking connection: on the sea up to 500.000Nm, on industrial applications on land even more.

Couplings for deck equipment

Loading containers, weighing the anchor, hoisting the draw nets, launching the lifeboats – wherever there is anything to move up or down on the sea, KTR couplings are involved. KTR’s marine couplings are found not only in various driving systems, but also on every type of deck equipment.

Shaft coupling for winches and cranes

The torsionally flexible ROTEX shaft coupling is used on deck winches and cranes. It is not only important to transmit the torques powerfully, but also to use them as a safety limitation, for example if a log gets caught in the winch or a draw net is caught on the seabed.

Couplings for hydraulic components

The ROTEX is also used in numerous electric power packs in marine hydraulics. Our BoWex coupling is proven on hydraulic power packs in combination with IC-engines, using the BoWex curved-tooth gear coupling as a highly flexible BoWex-ELASTIC or torsionally rigid BoWex FLE-PA flange coupling. Both couplings can be plugged in axially and are therefore easy to disassemble.

Couplings for marine pumps

KTR offers a large range of couplings for pumps used on marine vessels, such as the torsionally flexible jaw couplings ROTEX and POLY-NORM or the torsionally stiff steel lamina couplings RADEX-N and RIGIFLEX.

Couplings for marine compressors

On marine compressors, couplings should be compact in design and characterised by a high resistance to media and temperature. Here the torsionally flexible ROTEX or the highly flexible flange coupling BoWex-ELASTIC are good options.

Fail-safe couplings for generators

Sometimes a separate power source is required on board ship. This is not a problem with a powerful marine generator and a fail-safe coupling. ROTEX and BoWex-ELASTIC are again first choice: compact, flexible, transmitting high torques and damping vibrations.

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Press Release

KTR Kupplungstechnik Releases Free White Paper

KTR Kupplungstechnik a world-leading designer and manufacturer of marine couplings for the shipping industry, has released a free white paper on Ship Technology outlining the company's recent work on the world's largest mullti-purpose offshore vessel, Pieter Schelte.

White Papers

KTR Kupplungstechnik Installs Emergency Brake System for the Biggest Multi-Purpose Offshore Service Vessel in the World

Pieter Schelte is a dynamically positioned platform installation/decommissioning and pipelay vessel currently being built. Upon its completion in 2013, it will have a topsides lift capacity of 48,000t and a jacket lift capacity of 25,000t.

KTR Kupplungstechnik GmbH

Rodder Damm 170

48432 Rheine



+49 59 71 798 0 +49 59 71 798 698

KTR Kupplungstechnik Images

Products and Services


Press Release

28 May 2012

KTR Kupplungstechnik a world-leading designer and manufacturer of marine couplings for the shipping industry, has released a free white paper on Ship Technology outlining the company's recent work on the world's largest mullti-purpose offshore vessel, Pieter Schelte.

Read more
27 February 2011

The quality of KTR couplings and components is well-known throughout the world. To assure you that every process covering both development and customer service satisfies highest demands, we had ourselves certified, according to DIN EN ISO 9001, as one of the first companies in the field of drive

Read more
27 February 2011

The purpose of the ATEX standard is to protect those who work in explosive areas. ATEX is the standard within the EU to which the manufacturers of machinery that is to be used in potentially explosive areas have to adhere. KTR has been awarded ATEX certification for its range of oil/air c

Read more

Regional Offices

Indian Office

KTR Couplings (India) Pvt Ltd.

T - 36 / 37 / 38, MIDC, Bhosari

411026 Pune



+91 20 65 10 56 31
Belgian Office

KTR Benelux BV

Blancefloerlaan 167/22

2050 Antwerpen



+32 3 2110567 +32 3 2110568
Czech Republican Ofifce

KTR CR, spol sro

Olomoucká 226

569 43 Jevícko


Czech Republic

+420 461 325 162 +420 461 325 162
Brazilian Office

KTR do Brasil Ltda.

Rua Henrique Coelho Neto 381 / I Pinhais

PR CEP: 83321-030 Brasil



+55 41 36 68 99 26 +55 41 36 53 62 90
KTR Kupplungstechnik GmbH

Rodder Damm 170

48432 Rheine



Hans Hagedoorn +49 59 71 798 0 +49 59 71 798 698
Chinese Office

KTR Power Transmission Technology (Shanghai) Co Ltd

Floor 1 and 2, Bldg. B No. 1501 JinSui Road


201206 Pudong



+86 21 50 32 08 80 +86 21 50 32 06 00
Taiwanese Office

KTR Taiwan Ltd

1 F No 17 Industry 38 Road Taichung Industry Zone





+886 4 2359 3278 +886 4 2359 7578
UK Office

KTR Couplings Ltd.

Robert House Unit 7, Acorn Business Park

Sheffield, S8 0TB

Woodseats Close


United Kingdom

+44 11 42 58 77 57 +44 11 42 58 77 40
Dutch Office

KTR Benelux BV

Adam Smithstraat 37

7559 SW Hengelo



+31 74 2505526 +31 74 250 24 66
South Korean Office

KTR Korea Ltd

Adam Smithstraat 37

7559 SW Hengelo



+82 31 742 50 5526 +82 31 742 50 24 66
Norwegian Office

KTR Kupplungstechnik Norge AS

Industriveien 21

2020 Skedsmokorset



+47 64 83 54 90 +47 64 83 54 95
Polish Office (Ozimek)

KS Konstrukcje Stalowe KTR Group Sp zoo

ul Kolejowa 1

46-040 Ozimek



+48774026850 +48774651136
Polish Office (Krakow)

KTR Polska

Ceglarska 21/20

30-362 Kraków



+48 12 2 67 28 83 +48 12 2 67 07 66
Russian Office

KTR Privodnaya technika, JSC

Sverdlovskaya Naberezhnaya 60, Office 112

195027 St Petersburg



+7 812 4 95 62 72 +7 812 4 95 62 73
Italian Office

KTR Kupplungstechnik GmbH

Sede senza rappresentanza stabile sul Territorio Nazionale

40033 Casalecchio di Reno BO

Via Fermi, 25



+39 051 6 13 32 32 +39 027 0 03 75 70
Finnish Office

KTR Finland Oy

Tiistinniityntie 2

02230 Espoo



+358 207 41 46 10 +358 207 41 46 19
French Office

KTR France

46-48 chemin de la Bruyère

69570 Dardilly



+33 4 78 64 54 66 +33 4 78 64 54 31
Japanese Office (Kobe-shi )

KTR Japan Co Ltd

3-1-23 Daikaidori

652-0803 Hyogo-ku Kobe-shi



+81 7 85 74 03 13 +81 7 85 74 03 10
Japanese Office (Tokyo)

KTR Japan Co Ltd.

1-11-6, Taito-Ku, Ueno Tokyo Takeno-building, 4F, Room B




+81 3 58 18 32 07 +81 3 58 18 32 08
US Office

KTR Corporation

122 Anchor Rd

Michigan City, IN



United States of America

+1 219 872 9100 +1 219 872 9150
Swedish Office

KTR Sverige AB

PO Box 742

191 27 Sollentuna



+46 8 625 02 90 +46 8 625 02 99
Swiss Office

KTR Kupplungstechnik AG

Bahnstrasse 60

8105 Regensdorf



+41 433 11 15 55 +41 433 11 15 56
Spanish Office

KR Kupplungstechnik GmbH

Paseo Landabarri 4 (Esc 2) - 4° / Dpto. 3°

48940 Leioa Vizcaya



+34 9 44 80 39 09 +34 9 44 31 68 07

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