Page 26: of Marine News Magazine (June 2015)

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COLUMN LUBRICANTS

Shear Stability

The key to proper EAL Gear Oil selection.

By Ben Bryant, Marine Market Manager and Craig Desrochers, Application and Service Engineer at Klüber Lubrication NA LP.

Selection of gear oil for change in viscosity as a function of temperature is called marine thrusters or a stern Viscosity Index, or VI. As a general rule, the higher the VI, tube lubricant for use with the less the oil is affected by temperature change.

propeller shaft bearings is When formulating a lubricant, viscosity improvers (which often based on analyzing are often polymer based) can be used to increase the VI. Vis- price/performance char- cosity modi

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