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A unique invention
Being propeller shaft specialists, we keep developing our products. For example, the market demanded a radical improvement of the traditional wooden block brake. After all, an expensive disk brake system cannot always be an option. The question was how to do it properly at low cost. After intensive research, De Waal found the perfect solution, a double-calliper brake with an ingenious hinged movement that guarantees a slip-free hold on the propeller shaft.
The Stuwa® propeller shaft brake is a universal fit that can be installed by any shipyard. It is currently the most demanded product in the inland shipping industry, and is also available for other markets. The design of the braking system avoids any radial or axial loading of the shaft.
Operating principle
The brake is installed around the coupling flange by means of a hinged assembly, one side of which is attached to the engine bed. A screw is then adjusted to accurately set the brake’s free position. A hydraulic pump acts on one of the brake callipers, pushing it out of position so the propeller shaft is constricted on opposite sides by the hinged movement. The strong brake callipers are fitted with a thick brake liner to ensure an absolutely slip-free hold on the propeller shaft.
Installation
The brake is installed around the coupling flange by means of a hinged assembly, one side of which is attached to the engine bed. A screw is then adjusted to accurately set the brake’s free position. A hydraulic pump acts on one of the brake callipers, pushing it out of position so the propeller shaft is constricted on opposite sides by the hinged movement. The strong brake callipers are fitted with a thick brake liner to ensure an absolutely slip-free hold on the propeller shaft.
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Simple operation
The standard Stuwa propeller shaft brake is supplied complete with a hydraulic hand pump, which can be fitted in any easily accessible location in the engine room. An electrically driven pump set is available as an option. This can be operated from within the engine room, or even from the bridge above. How easy can it be?
Most popular use
When at anchor in midstream, or when sailing a twin-screw ship downstream on half power, is when the Stuwa© brake is most often used. Reversing clutches simply weren’t designed to be driven in reverse by fast-flowing water turning the propeller, and a lack of lubrication can easily cause considerable damage to the gears. In a stationary ship a rotating propeller can also cause an irritating noise.
Features
- Compact and simple brake system
- Easily installed by any shipyard
- Ingenious and sophisticated cantilever design
- Brake callipers with hard-wearing linings
- Available with fixed or detachable brake callipers
- Suitable for coupling flange or shaft installation
- Standard sizes fit diameters from 140 to 520 mm
- Standard delivery with hand pump and pressure sensor
- Ergonomic, light manual operation
- Electric remote operation option available
- Practically maintenance-free system
- Proven, field-tested quality
- Best-selling system in Europe