MCL were contracted by the Royal National Lifeboat Institution (RNLI) to shrink 4 propeller shaft bearings for their all-weather Severn class lifeboat based at Holyhead.

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All 4 bearings were cooled in liquid nitrogen and then fitted in either end of the 2 propeller shafts by the Holyhead Marine technicians.

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Once the bearings had returned to their ambient temperature and size, the propeller shafts could then be re-fitted.

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The Photographs show:

• The RNLI Severn class lifeboat.

• The bearings being cooled.

• Fitting by the technician.

• The bearing in its final position.