Precision-Centered. Performance-Driven.
Accurate alignment of stern tube and strut bearings is essential to the reliability of marine propulsion systems. At ROTATEK, we provide precision alignment services for stern tubes, strut bearings, tail shafts, and complete shaft lines using advanced laser tracking technology and proven engineering methods.
Whether during new construction, dry dock repair, or retrofit, our technicians ensure the shaft is aligned to exact tolerances—preventing premature wear, excessive vibration, and failure of bearings or seals.
how Can we Help you?
Our expert team is ready to help you with your next project. Explore the industries we serve or contact us to learn more.
Ensure smooth, efficient shaft line performance with precision alignment of stern tube and strut bearings. Using high-accuracy laser tracking, ROTATEK aligns critical supports to the shaft centerline—reducing vibration, preventing seal wear, and extending bearing life.
From propulsion shafting to structural measurement, ROTATEK offers a full suite of marine solutions tailored to shipyards, fleets, and OEMs. Discover how our advanced capabilities support precision and reliability across every phase of vessel construction and maintenance.
Why Stern Tube & Strut Bearing Alignment Matters
As critical supports for the propeller shaft, stern tube and strut bearings must share a common centerline with the shaft and other bearings. Misalignment at any point can lead to:
Seal degradation and oil leakage
High bearing temperatures or metal-to-metal contact
Shaft deflection and increased vibration
Reduced fuel efficiency and propulsion loss
Our Alignment Services:
Laser Tracker Alignment
High-accuracy, NIST-traceable laser measurements for stern tube bores, strut bearing housings, and shaft centerline verification.
Strut Bearing Alignment
Ensure strut bearings are correctly positioned in 3D space to maintain shaft line alignment, even in flexible hull environments.
Bearing Centerline Establishment
Verify alignment between intermediate shaft bearings, stern tube bearings, and struts for continuous and stress-free support.
Shaft Deflection & Runout Checks
Detect deviations that signal mounting or support misalignment.
Thermal Growth Compensation
Adjust for hull expansion and bearing movement under operating temperatures.
Strain Gauge & FEM Correlation (Optional)
Measure actual bearing loads and stress distributions to confirm alignment under real or simulated conditions.
Detailed QA Documentation
Full reporting suitable for commissioning, class approval, and shipyard records.
Integrated Metrology Solutions
We also offer complementary services that support your alignment needs:
Each of these services is designed to ensure your equipment, assemblies, and tooling not only meet design intent but perform to exacting standards.
Why Choose ROTATEK?
Certified: AS9100D, and ISO 9001:2015
24/7 Availability & Rapid Mobilization
Industry-Leading Equipment: FARO, LEICA, PRUFTECHNIK
Trusted Marine Alignment Experts
With decades of experience aligning propulsion systems for naval, commercial, and offshore fleets, ROTATEK is trusted by shipyards and operators worldwide. Our field engineers deliver precision alignment services afloat or ashore—on schedule, every time.
Ready to Align with Excellence?
Ensure your stern tube and strut bearings are aligned to perform—contact ROTATEK today for expert service, custom measurement plans, or emergency field support.