be_ixf;ym_202407 d_20; ct_50

In-Situ guide rail machining

XY milling for a dredger in drydock

During the dry docking of a dredger in the UAE, Goltens was approached by the ship’s owner to determine if we could carry out in-situ milling of the Guide Rail for the ship’s Transverse Spud Wagon. As these rails are part of the ship’s superstructure, the only option was to machine them in-place.

Inspection revealed that there had been distortion on the guide rails due to welding performed. The distortion affected both rails and covered a distance of over 7 meters of the 12 meter rails.

Goltens immediately mobilized a team of two in-situ machinists to carry out the work and deployed our electric/hydraulic operated three axis milling machine.


Guide Rail Machining
Rail Length: 12 meters
Machined Area: 7 meters X 500mm
Rails Machined: 2


  • Machining of rails on both sides with reference point given by the yard.
  • Set up machine on each side 3 times to cover the length of 7 meters.
  • Removed up to 6 mm in height to get the rail within the tolerances.


The job was completed to the full satisfaction of the owner over an 8 day period with 12-hour shifts due to yard restrictions. Capacity of milling machine employed is 3000 mm in X axis 600 mm in Y axis and 200 mm in Z axis

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