Stern tube bearing system of contra-rotating propeller

A stern tube bearing system in a contra-rotating propeller device of the type in which an inner shaft having a rear propeller and an outer shaft having a front propeller are rotated in opposite directions, said stern tube bearing system comprising

• the inner shaft having a substantially central longitudinal bore therein for supplying pressurized oil therethrough;
• and
• a plurality of oil supply holes extending from said longitudinal bore to the outer surface of said inner shaft, and opening thereat, said plurality of oil supply holes being spaced radially around said inner shaft and being spaced longitudinally along said inner shaft, said plurality of oil supply holes directing the pressurized oil supplied into said longitudinal bore outwardly of said inner shaft for establishing an oil bearing film adjacent the outer surface of said inner shaft.