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Dellner Brakes Precision-Engineered Marine Braking, Turning and Locking Systems


Dellner Brakes manufactures technologically advanced stopping, turning and locking (STL) systems and products for the marine industry.

Following the company’s acquisition of Gummi USA in September 2017, the company now also supplies a range of high-quality pneumatic drum clutches, brakes, shaft couplings and rotary unions.

Precision designed in Sweden, Dellner’s brakes and clutches can be found in marine vessels, such as modern aircraft carriers, cargo ships, ferries, workboats, luxury yachts, and cruise liners, including Cunard’s flagship the RMS Queen Mary 2.

Stopping, turning, locking (STL) system solutions

Dellner’s innovative STL braking systems are precision-engineered to facilitate faster directional changes with maximum manoeuvrability.

The unique design also reduces fuel consumption, load on the propulsion systems, and sea growth on the propeller, and enables easy and safe maintenance.

STL braking systems follow the process below:

  • Stop: a hydraulic or electric disc brake system stops the shaft quickly in any position
  • Turn: after the brake has stopped the disc, a separate mechanism turns the disc and connected shaft into position for locking
  • Lock: once in position, the locking mechanism pushes a specially designed tapered pin into a machined slot on the brake disc

This process locks and holds the shaft securely in place, even in ship failure modes. The systems are modular, so customers can choose one, two or all three STL functions to meet their requirements.

The electrically powered continuous turning (cT) function, available with the electrical STL or as an option on the hydraulic STL, allows the shaft and propeller to be turned forwards and backwards for long periods at variable speeds, easing maintenance, checking and testing processes.

Fully automated electrical STL (eSTL) braking systems

Dellner’s fully automated electrical STL (eSTL) braking system is the first of its kind in the world and has a patent pending.

Developed in response to an increasing global focus on environmental issues and a demand for smaller, flexible braking solutions, this electrical system offers high levels of power in a compact configuration.

eSTL needs no additional piping, making it quick, easy and cost-effective to install, especially where space is limited. It’s simple to use and maintain, hard-wearing, and suitable for applications where a clean environment is critical or for use in green shipping zones.

The fully automated system can also be operated from an optional remote hand-held control, giving operators the freedom to inspect the system during maintenance and testing.

eSTL offers stopping torque up to 900kNm, turning torque up to 600kNm and locking torque up to 1,650 kNm.

Precision-manufactured disc brakes for marine vessels

Dellner’s SKD disc brake systems are precision-engineered for powerful, reliable and safe braking of rotary motion, as well as increased brake lifespans. They are designed for use on propulsion propeller shafts or wherever service, stopping, holding or tensioning is needed.

These direct-acting, hydraulic or air pressure-applied, spring-released units have a braking force up to 516 kN, which is directly proportional to the pressure applied.

Each symmetrical brake half has two guide pins that transmit the tangential braking force from the brake lining to the housing and mounting support. This removes any radial force on the brake pistons, contributing to a longer brake lifespan. Brake pad wear is automatically compensated for with the systems’ increased piston stroke.

SKD disc brakes are available in a range of standard sizes and can be customised to order, with a range of optional mechanical switches to indicate on / off and brake wear.

Dellner also produces a range of SKP spring applied / pressure released disc brakes for emergency braking on cranes, winches and other deck and dockyard machinery.

Locking mechanisms (LM) for ship propeller shafts

With a locking force of up to 1,000 kN, which is higher than a holding brake, Dellner’s locking mechanisms provide a compact, cost-effective solution for holding propeller shafts in place while also reducing brake wear.

The LM can be operated manually, hydraulically or electrically.

Pneumatic clutches and brakes

Through their Dellner Gummi USA brand, the company provides a range of high-quality drum style pneumatic clutches and brakes, both constricting and expanding types, that are fully interchangeable with all other clutch brands in the market today.

About Dellner Brakes

Dellner Brakes is a world leader in marine braking solutions. The company’s flexible, customer-oriented approach allows them to continually adapt their products to meet customers’ specific needs and changing market requirements.

Dellner Brakes is ISO 9001: 2008 certified and its commitment to cutting-edge design, robust assembly and precision testing ensures reliable, high-quality products.

From their two large stock facilities in Borlange, Sweden, and Houston, Texas, Dellner can ship components and spare parts worldwide in just 24 hours. The company also works with a global network of dedicated contractors and distributors.

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Press Release

Dellner Brakes to Launch Expanded Product Range to US Marine Market at IWBS 2017

Dellner Brakes will be launching an expanded range of power transmission products to the US marine market at the International Workboat Show (IWBS) from 29 November to 1 December, following the company’s acquisition of US brake and clutch specialist Gummi USA.

White Papers

Hydraulic ‘Stopping, Turning, Locking’ Systems for UK Navy T45 Destroyers

BAE Systems has on the UK Royal Navy's behalf planned to build six destroyers of type T45.

Dellner Brakes AB

Teknikergaten 1


SE-781 70


+46 (0)23-78 3054

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Press Release

13 November 2017

Dellner Brakes will be launching an expanded range of power transmission products to the US marine market at the International Workboat Show (IWBS) from 29 November to 1 December, following the company’s acquisition of US brake and clutch specialist Gummi USA.

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20 September 2017

Swedish-based Dellner Brakes has acquired US brake and clutch company Gummi USA to consolidate its position as one of the world's leading suppliers of brakes and related power transmission products for the industrial and marine markets.

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30 August 2017

The mighty HMS Queen Elizabeth aircraft carrier, which arrived at her home port of Portsmouth last week, is fitted with two Dellner Brakes 'stopping, turning, locking' (STL) systems that, weighing in at 11,000kg each, are the biggest STL systems that Dellner Brakes has ever built.

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21 June 2017

Dellner Brakes, one of the world's most innovative manufacturers of technologically advanced braking systems, is introducing two groundbreaking new failsafe brakes to its SKP range that, by combining terrific power with modular, lightweight design at competitive prices, are set to revolutionise the braking market.

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3 May 2017

Dellner Brakes, one of the world's most innovative manufacturers of technologically advanced braking systems, is introducing two new heavy-duty disc brakes to its SKD range that, through a new modular design, are set to deliver more choice and outstanding stopping power at extremely competitive prices for large industrial, marine and offshore applications.

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Regional Offices

Dellner Brakes AB

Teknikergaten 1


SE-781 70


Roger Axelsson, Global Sales Manager +46 (0)23-78 3054
Jeff Sistrunk, Gulf Coast Sales Consultant +1 832 482 4830
Jaakko Miekkala, Sales Representative +46 (0)23 78 30 59
Central Europe
Mijndert Geesink, Sales Manager +31 (0)6 516 272 57
Tan Li, Sales Representative +46 (0)23-78 30 59

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