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PRODUCTS
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Crank Shaft
The crankshaft is a central device that sets the propeller shaft in motion by converting the vertical piston¡¯s movement, which is delivered by the explosive power of combusted fuel in the engine, into rotation. While small and medium size crankshafts are manufactured in a single unit, the large crankshafts made by Doosan consist of a ¡®Crank Throw¡¯, ¡®Main Journal, ¡®Flange Journal¡¯ and ¡®Thrust Shaft¡¯ and are all manufactured separately before the final steps of assembly and processing. Generally small and medium size crankshafts are manufactured through either a casting or forging process, but Doosan forges all the crankshafts it uses for large low-speed engines.
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Rudder Horn
The rudder horn and stern boss are the main parts of the steering and propeller systems. They are generally classified as sections of the stern casting platform, since both of them are mounted on the stern of a ship.
The rudder horn fastens and supports the rudder, and is directly connected to the rudderstock and pintle forged by Doosan. The stern boss enables the movement of a ship by supporting the propeller and propeller shaft, thus forming the power transmission system.
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Propeller Shaft
Shafts are generally classified into propeller shafts and intermediate shafts. Depending on the size of the boat, either just a propeller shaft or both the propeller and intermediate shaft types may be used. In some cases only a set of intermediate shafts are mounted. The propeller shaft is mounted on a propeller, while the intermediate shaft is attached to the crankshaft to relay the crankshaft rotation to the propeller shaft and move the propeller.
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