Abstract
The first part of this paper deals with the development of the surface-hardened and ground marine gear. The accuracy which can be attained today in finish machining of such gears is discussed. Modern gear grinders can now produce two- and three-dimensional tooth corrections of any shape deemed necessary. The second part describes the more sophisticated combined marine propulsion gear system CODAG and a reverse gear for high-power transmission. Rules for the safe operation of such systems are laid down and the required synchronizing clutches are described.
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