Propeller Shaft · Shaft Line & Propulsion
The Kongsberg Kamewa A5 is a modular propeller shaft line designed for high‑power DP and offshore vessels, offering integrated thrust bearing and condition monitoring.
| Stern tube seal inspection | annually or per class survey interval |
|---|---|
| Thrust bearing oil/grease sampling | annually |
| Shaft NDT (crack detection) | per class tailshaft survey interval, commonly every 2.5-5 years depending on lubrication type and class notation |
| Alignment check | at dry-docking |
Class tailshaft surveys require periodic withdrawal/inspection, or continuous survey with oil sampling and condition monitoring data where an approved CM notation applies, checking bearing wear-down, seal condition, and NDT of the shaft in way of couplings and bearings.
Estimated lifetime: Propeller shaft lines are typically designed for the vessel's full service life (25-30 years) with periodic bearing and seal renewal; the shaft itself is renewed only if NDT survey findings such as cracking, corrosion, or wear require it.
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