Propeller Shaft · Shaft Line & Propulsion
A Kongsberg Maritime Kamewa Controllable Pitch Propeller (CPP) provides variable blade pitch to deliver thrust, allowing rapid reversal and fine speed control without changing shaft rotation direction.
| Hub oil sample analysis | typically every 3-6 months or per class PMS |
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| Hub oil change | per Kongsberg's schedule for the hub size fitted, commonly on a multi-year interval unless sample results dictate earlier change |
| Blade bolt torque check | at each drydock or per class-required interval |
| OD box seal inspection | annually or when leakage is observed |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Blade bolt condition | reject on any visible corrosion pitting, thread damage or evidence of previous loosening - torque values are propeller-size specific, confirm against Kongsberg documentation |
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Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Propulsion shafting/CPP surveyed under class rules for tailshaft and propeller; hub oil condition monitoring can in some class systems support extended survey intervals. Seal integrity and pitch feedback calibration are typically checked at survey.
Estimated lifetime: CPP hub and blade service life is generally governed by drydock cycle and oil condition rather than running hours - internal examination of underwater parts is commonly tied to tailshaft/propeller survey intervals of roughly 2.5-5 years, not a fixed hour count.
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