Azimuth Thruster · Shaft Line & Propulsion
Schottel GmbH SRP RudderPropeller (100-800 series range) — Main propulsion for low to medium speed vessels, tugs, ferries, offshore vessels - 360-degree steering without separate rudder.
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| Gear oil sampling | typically every 3-6 months in service |
|---|---|
| Gear oil change | annually, or on a running-hour trigger that is model-dependent across this wide power range |
| Propeller shaft seal renewal | typically at dry-docking (2.5-5 year interval) or on condition |
| Anode inspection/renewal | every dry-docking, more often in warm or brackish water |
| Internal gear inspection (borescope or partial strip-down) | per class continuous survey scheme or Schottel's model-specific interval - varies significantly across the 190-6200 kW range |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
Steerable thrusters used for main propulsion are typically surveyed under class's propulsion/steering requirements, including periodic tailshaft/seal condition checks and steering-gear response trials. Where enrolled as a Continuous Survey Machinery item, in-service inspection follows the approved scheme rather than a fixed calendar date.
Estimated lifetime: Azimuth thruster mechanical drivetrains of this type typically run 20+ years with periodic seal, bearing, and gear oil renewal. The propeller and shaft seal are the practical wear-limiting items rather than the housing or shafting.
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