Marine Services


Stern tube bearing, strut bearing bore alignment, coupling sag and gap, shaft strain gauge, tail shaft, cardan shaft, large part inspection, installation, leveling


ROTATEK provides 3D marine alignment services and precision measurement solutions including main engine alignment, reduction gear alignment, tail shaft coupling sag and gap alignment, stern tube and strut bearing bore alignment, cardan shaft and strain gauge alignment. Utilizing the latest 2D and 3D laser technologies available, we are able to perform these services faster with higher accuracy than traditional methods saving valuable outage time and resources.

Excessive vibration on marine vessels can often be the result of misalignment which can ultimately lead to failures and costly repairs. For the safe and reliable operation of your propulsion system, precision alignment is an essential requirement.

A detailed graphical measurement report is supplied with all marine alignment services.

Our commitment to excellence paired with our state-of-the-art measurement capabilities makes ROTATEK your trusted precision service partner.


Our expert team is ready to help you with your next project.
Explore the services we offer or contact us to learn more.

3D Laser Bore Alignment and Measurement Solutions

Bore alignment is the process of aligning circular, cylindrical or other geometric shaped bores to each other and or to other features so that they are straight, concentric, parallel, perpendicular, level and plumb depending on the application.

Unlike traditional alignment methods using piano wire, alignment scopes and 2D laser optics, ROTATEK utilizes 3D portable coordinate measuring machines (PCMM) including Laser Trackers and Measuring Arms for unparalleled accuracy, precision and measurement acquisition time.

Precision bore alignment services include stern tube and strut alignment, tail shaft bearing bore alignment, rudder alignment, engine crankcase & cylinder bore alignment, and more. Bearing bore alignments can be verified using jack-up, strain gauge, sag and gap measurement techniques.

Bore and Coupling Alignment

Stern tube and strut alignment, bearing bore alignment. Main engine and reduction gear alignment.

Sag and Gap

Alignment method which uses the calculated shaft deflection to determine the tail shaft sag (hang) and gap (distance) of a decoupled flange to align two shafts relative to each other.

Jack-Up and Strain Gauge

Stern tube and intermediate bearing alignment, bearing reaction and bearing load measurements.

Cardan Shaft

Marine cardan shaft laser alignment. A cardan shaft is a spacer shaft with a universal joint at each end allowing for either a parallel Z configuration or an angular W configuration.

Shaft Modeling

Utilizing a 3-D based Computer Aided Engineering (CAE) software a model of the ship’s propulsion system is created for the purpose of optimizing shaft alignment and vibration design.

3D Measurements

Laser trackers operate by measuring two angles and a distance. The tracker sends a laser beam to a retroreflective target held against the object being measured. As light is reflected off the target, it bounced back and re-enters the tracker at the same position it left and is measured by a distance meter, measuring the distance between the tracker and targe

Distance Measurement

The tracker sends a laser beam to a retroreflective target held against the object to be measured. The reflectedbeam returns to the tracker and its precise distance is recorded.

3D Measurement

Two angle encoders measure the elevation and rotational angles while a highly accurate absolute distance meter is used to determine the 3D position of the target. This position is shown in the software as an X, Y, Z value.


The target returns the reflected laser beam parallel but offset back to the tracker where it hits the position detector, which calculates the offset between the outgoing and incoming beam. Servo motors continuously (thousands of times per second) steer the tracker’s head to minimize the offset between the two beams, resulting in high-speed, dynamic measurements.

  • Shaft Alignment
  • Coupling Alignment
  • Cardan Shaft Alignment
  • Bore Alignment
  • Diesel Engine Alignment
  • Gearbox Alignment
  • Generator Alignment
  • Bearing Alignment
  • Electric Motor Alignment
  • Stern Tube Alignment
  • Strut Alignment
  • Rudder Alignment
  • Propulsion Alignment
  • Main Engine Alignment
  • Geometric Alignment
  • 2-D and 3-D Alignments
  • Machine Train Alignment
  • Simultaneous Multi-Coupling Measurement
  • Thermal Growth and Dynamic Movement
  • Geometric Dimensioning and Tolerancing
  • Hull Deformation
  • Flatness, Straightness, Concentricity, Parallelism, Perpendicularity
  • Tail Shaft Coupling Sag and Gap Alignment
  • Jack-Up Bearing Reaction
  • Strain Gauge Alignment

Misalignment costs time and money

Did you know over 50% of rotating equipment failures are directly related to misalignment and unbalance?  Misaligned or unbalanced equipment are subjected to higher vibration levels significantly reducing the service life of bearings, seals, shafts and couplings.

  • ROTATEK can help reduce overall operating costs and increase equipment reliability, efficiency, productivity and uptime with our precision balancing and expert laser alignment services.
  • Our field service engineers have extensive knowledge with rotating equipment and are trained in the latest measurement technologies and precision maintenance practices
  • We are committed to excellence and are dedicated to provide you the best service possible
  • We travel to you no matter where in the world you may need us
  • 24/7 emergency service is available
  • We can Align Anything, Anytime, Anywhere

Precision alignment benefits:

  • Reduced overall operating costs
  • Reduced power consumption
  • Reduced machinery vibration
  • Reduced wear on bearings, seals, shafts and couplings
  • Reduced machinery failures
  • Reduced vibrations in machine bases, foundations, ductwork, piping, etc
  • Aerospace
  • Automotive
  • Construction
  • Converting
  • Petrochemical
  • Manufacturing
  • Nuclear
  • Oil and Gas
  • Plastics
  • Power Generation
  • Marine and Shipbuilding


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