Which of the following methods is used to securely fasten the Babbitt lining of a reduction gear bearing to its shell?

Correct Answer: Option D — The Babbitt is centrifugally spun into the bearings or cast under a pressure head.

Centrifugally casting Babbitt lining directly into the steel or bronze bearing shell ensures a homogeneous, void-free metallurgical bond and high interfacial adhesion necessary to withstand heavy cyclic loads encountered in marine main propulsion reduction gears.