Extreme‐Pressure Lubricants for Marine Gears

OVER THE PAST FEW YEARS interest has grown in Britain and elsewhere in the use of extreme‐pressure (e.p.) lubricants (or more correctly perhaps, though less conveniently, load‐carrying additive lubricants) for marine main propulsion gearing, and many ships now go to sea with such lubricants in their main systems. Several technical papers on the development of such lubricants have been contributed recently, for example by Elliott and Edwards and Socolofsky and others, the main purpose of this paper is to indicate present and likely future marine main reduction‐gear requirements and to discuss how far these are met by the developments in extreme‐pressure lubricants.