On November 25 2001 Glasgow Engineering were contracted to supply labour to Southern Marine Ship Lift for the docking of the OSV Lady Elizabeth. This routine docking required staff from Glasgow Engineering, to overhaul the sea valves, bow thrusters and azimuth thrusters plus associated fabrication and welding work. Working alongside a representative from Rolls Royce it was discovered that a large amount of wear had occurred in the azimuth thruster housing. Using a piano wire to set up from, the job of line boring the housing was undertaken and a sleeve shrunk in position. Rolls-Royce is a global leader in the supply of azimuth thrusters. In an azimuth thruster the propeller rotates 360° around the vertical axis so the unit provides propulsion, steering and positioning thrust for superior manoeuvrability. Designs have been developed for propulsion and dynamic positioning in response to market requirements. As a result, there is a design available to suit virtually any application. Simple and robust construction provides high operational reliability together with simple maintenance for low through life costs. Units can be supplied for diesel or electric drive together with a remote-control system.

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OSV Lady Elizabeth up on the SMSL Syncro Lift , Glasgow Engineering’s fitters Shawn Foley and Sean Richardson setting up the line borer.
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Setting up the line borer
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Line Boring housing
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Glasgow Engineering’s fitter Sean Richardson setting up the line borer, Sean is now the current Manager of SMSL
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This Photo shows the housing machined in situ ready for the sleeve to be shrunk in position. The hole diameter bored was 25.7 inches (652.78mm).
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Due to water impregnation the Azimuth Thruster was dismantled
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Water damage to the bearings and internals of the Azimuth Thruster
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Machining seal surfaces on Azimuth Thruster spindle at Glasgow Engineerings machine shop
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OSV Lady Elizabeth
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