A circular section rod or bar which transmits rotary motion, e.g. propeller shaft.

Oil distribution shaft – A hollow propulsion shaft where the bore and radial holes are used for distribution of hydraulic oil in controllable pitch propeller installations.

Propeller shaft, tail shaft – A short shaft passing through the stern tube with a tapered outer end on to which the propeller is locked.

Thrust shaft – A thrust shaft is a part of the propulsion shaft which transmits thrust to the thrust bearing.

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