Steplessly vary the propeller
rotation at constant
engine speed.

Prop.act MD

Variation of propeller rotation
at engine idling speed

Prop.act HD

Variation of propeller rotation at nominal
speed, full firefighting pump output and
simultaneous low propeller rotation for
holding position via drive system

Power *2.900 kw4.150 kw2.750 kw
Speed *1.800 min-11.600 min-1750 min-1
Torque15.750 Nm25.000 Nm35.650 Nm
Heat dissipation45 kW90 kW450 kW
* other specifications upon request

Trolling | Dynamic Positioning

Precise and safe positioning

The Prop.act makes it possible to steplessly vary the propeller rotation at constant engine speed and, vary the thrust via the control lever. The unit is confi gured for continuous operation and as such can be used for dynamic positioning.

System solution

Self-sufficient and ready-to-install

The Prop.act is a self-sufficient clutch system which comprises of an operationally ready clutch unit and the Prop.act control system. The unit can be freely positioned in the drive train and is mounted on the floor of the vessel. The engine and rudder propeller can be connected using drive shafts, for example. The Prop.act control system is connected to the ship‘s control. The supplied cooling system is integrated in the ship‘s cooling circuit. Free accessibility of the Prop.act facilitates ideal service conditions with a self-sufficient oil circuit, which is adapted optimally to the clutch system.


Pinpoint accuracy in any situation

The Prop.act HD is primarily used for applications with firefighting systems. Here, the firefighting pump can be operated by the main diesel engine while the drive remains active to hold the position at low propeller rotation.

Prop.act Features

All features in one clutch-system.











Your benefits

Full propeller control.

Extreme continuous slipping

Simple integration


Long service life

Sturdy construction

Trolling to speeds close to zero


Compact design

Ortlinghaus Service World

Fast reaction times, global presence and extensive know how of our Service Team make the difference.

  • spare parts
  • overhaul at Ortlinghaus
  • & repair worldwide
  • check

“Excellent clutch for harbour tugs with a proven design based on decades of experience and knowledge.”


Former product director tugs and workboats at DAMEN shipyards

“Ortlinghaus is providing outstanding engineering support as our reliable partner for more than 15 years.”


Chief executive officer (CEO) & president ‘Industrial Operations’ at SCHOTTEL GmbH

Visit us at Workboat Show 2019

04 – 06 Dec 2019 | USA

Our representation in USA, Orttech, looks forward to seeing you. North America’s largest commercial marine tradeshow in New Orleans, La. The WorkBoat Show is the only solution that can connect you to the best resources in the maritime industry all in one convenient location.

Europort 2019

Visit us at the Europort in Rotterdam

Our representation in Netherlands, De Graaf Aandrijvingen B.V., looks forward to seeing you.

From 5 – 8 November 2019 Europort, organised in the world port city of Rotterdam, will be the leading exhibition for special purpose vessels. Europort is thé business hub for the maritime sector, as the event focuses on specialised ships and the smart solutions which drive success. With 27,000 professional visitors and 1,100 exhibiting companies Europort belongs to the world’s leading maritime meeting places.

Marinetec china

Visit us at marintec China.

03 – 06 Dec 2019 | China

Our representation in China, Ortlinghaus International Trading (Shanghai) Co., Ltd., looks forward to seeing you.

Marintec China is poised to be the definitive event and is undoubtedly a must-attend marine exhibition for all involved in the maritime industry. The 2019 edition will be held from 3-6 December 2019 at the Shanghai New International Expo Centre in Shanghai, China and continue its dedication to serve as the “LEADING” platform “CONNECTING” the community and “STRENGTHENING” the maritime industry.

The complete maritime supply chain is represented in Asian maritime market. From shipbuilding materials and semi-finished goods, raw components to electrical systems, deck and safety equipment to port constructions, shipbuilding systems and technology.


Get your Ticket

Get your free visitor ticket for the SMM 2018 here and visit us at our booth!


Get in touch

You are interested in further information?
Talk to our expert.

Michael Kenntemich

Industry Manager | Marine Propulsion