Intermediate Shaft
critical
IMO Required
Connects engine flywheel to propeller shaft through engine room
5 yr
Class Survey
30 yr
Typical Lifetime
Typical Manufacturers
Wartsila
MAN
Kawasaki
Known Models (2)
MAN Intermediate Shaft 330mm
8000 kW
· N/A (mechanical)
Common Failures:
- • Flange bolt loosening
- • Journal surface wear
- • Torsional vibration cracking
Service: Bearing clearances must be within MAN specification.
Spares: MAN: Dichtungs-Elemente und Verschleißmesswerkzeuge an Bord vorhalten. Lead time: 4-8 Wochen.
Wärtsilä Intermediate Shaft 380mm
12000 kW
· N/A (mechanical)
Common Failures:
- • Coupling bolt fatigue
- • Bearing wear
- • Alignment shift from hull deflection
Service: Check alignment with laser during drydock; coupling bolts are critical.
Spares: Wärtsilä: Dichtungs-Elemente und Verschleißmesswerkzeuge an Bord vorhalten. Lead time: 4-8 Wochen.