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Nakashima Propeller (Japan)
NTT Series (Tunnel Thruster)
The Nakashima NTT series is an electric bow tunnel thruster featuring a fixed‑pitch propeller and gear drive housed in a steel tunnel, designed for precise low‑speed maneuvering.
30-2,000 kN thrust
Capacity
Seawater
Medium
Components & Design
Component data being added…
Technical Data
type
Tunnel Bow Thruster (FP)
variant count approx
4
period start year
1985
drive type
Electric
construction
FP propeller, gear drive, steel tunnel
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Common failures & inspection points
●Gear bearing wear after 20,000+ hrs
●Motor moisture ingress
●Propeller blade erosion
Service & Maintenance
Standard tunnel thruster maintenance. Gear oil analysis every 1,000 hrs. Propeller inspection at drydock.
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Maritime Network →Replacement Parts
Nakashima (Okayama, Japan). Lead time: 3-6 weeks Asia.
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Equipment Model #37794
· ✓ still in production