Dellner Brakes AB - Precision engineered marine braking, turning and locking systems

Dellner Brakes AB is one of the world's most innovative manufacturers of technologically advanced braking, turning and locking systems 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 can be found in some of the world's leading cruise liners including Cunard's sumptuous flagship the RMS Queen Mary 2 and Celebrity Cruises' four luxury Millennium Class liners.

STL (stopping, turning, locking) system solutions

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

The unique design also contributes to lower fuel consumption, reduces load on the propulsion systems and allows for easy, safe maintenance including hydrodynamic bearing conditioning.

Here's how STL works:

  • 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 at a variable speed into position for locking.
  • Lock: Once in position, the locking device (LM) pushes a specially designed tapered pin into a machined slot on the brake disc. This 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 of the stopping, locking and turning functions to meet their requirements.

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

Electrical STL - a world first

Dellner's fully automated electrical STL (eSTL) braking system is a world first 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 groundbreaking electrical system offers terrific power in a compact configuration.

The eSTL system needs no additional piping, making it quick, easy and cost effective to install - especially where space is at a premium. It's simple to use, hard wearing and easy to maintain, and it's perfect for applications where a clean environment is paramount or for use in green shipping zones.

The system is fully automated and 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 900 kNm, turning torque up to 600 kNm and locking torque up to 1,650 kNm.

SKD disc brake systems

Dellner's SKD disc brake systems are precision engineered for powerful, reliable and safe braking of rotary motion and longer brake life. 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 of 8 kN (SKD 35) to 516 kN (SKD 4x140), which is directly proportional to the pressure applied.

The two symmetrical brake halves each have 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 longer brake life. Brake pad wear is automatically compensated for with increased piston stroke.

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

Locking mechanisms (LM)

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.

Why Dellner Brakes?

Dellner Brakes is a world leader in marine braking solutions. Their strong focus on innovation stretches back 50 years and their flexible, customer oriented approach allows them to continually adapt their products to meet customers' specific needs and changing market requirements.

Dellner Brakes AB is ISO 9001:2015 certified and their commitment to cutting edge design, robust assembly and precision testing means you can count on reliable products of the highest quality, every time.

From its two large stock facilities in Borlange, Sweden and Houston, Texas (and working with a global network of dedicated contractors and distributors), Dellner can ship components and spare parts anywhere in the world in just 24 hours.

To find out more about Dellner Brakes and their world beating braking products, visit their website at or get in touch using the contact form below.


Products and Services

Contact Details

Dellner Brakes AB
Teknikergaten 1
SE-781 70

Contact: Roger Axelsson, Global Sales Manager
Tel: +46 (0)23-78 3054

Marcus Aberg (right) and Edgar Roca, Dellner Brakes Gummi USA acquisition.
QE aircraft carrier.
Cutting-edge braking solutions, built by Dellner Brakes at its production facility in Falun, Sweden.
Cunard’s flagship the Queen Mary 2 is fitted with Dellner brakes.
Dellner’s unique STL (stopping, turning, locking) braking system, for maximum manoeuvrability and enhanced performance.
50 years of innovation – Dellner Brakes has launched the world’s first electrical stopping, turning, locking braking system (patent pending).
Powerful, reliable disc brake systems, precision engineered for longer brake life (item shown: SKD 4 x 140).
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