This paper explains some of the problems arising from the increased speed and horsepower being applied to modern steel rolling mills. To deal with these problems techniques have been adopted which have already been used in cement mill and marine propulsion gearing. The use of harder materials, including case carburized steels is the primary recommendation. A modern steel mill operating in Holland is used as a basis for comparing the “advanced technique” gearing with conventional steel mill gearing. The paper also includes a brief description of some of the manufacturing operations which are unique to this type of gearing.

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