Thordon Bearings for NMDC’s Dredger Al Khatem

The National Marine Dredging Company has replaced the rubber cutter shaft bearings on the 89m dredger Al Khatem, marking a step closer to NMDC’s fleet-wide conversion to Thordon Bearings’ seawater lubricated Composite cutterhead bearings and cutterhead intermediate lineshaft bearings.

The 1979-built Al Khatem is the latest heavy-duty cutter suction dredger NMDC has converted to the Thordon solution, following the success of similar conversions to the Al Sadr, Al Mirfa, Al Hamra, Umm Al Zemoul, Umm Al Anber and the beaver Dredge 2.

Three more beaver dredgers Embarka 2, Embarka 5 and Embarka 6 are scheduled for conversion at an Egyptian yard later this year.

Since the first bearing conversion in the 1990s, the robustness and through-life performance of Thordon’s Composite bearings have proven to reduce NMDC’s vessel operating costs. This is largely because the elastomeric polymer bearing does not require any lubricating grease, reduces vessel downtime and extends time between bearing replacement.

Commenting on their performance, NMDC Technical Director Mr. Mohamad Al Sayed said: “Thordon’s Composite is the best bearing material invented. It gives you peace of mind when dredgers are operating 24/7.

George Morrison, Thordon Bearings’ Regional Manager, EMEA ANZ, said: “Composite seawater lubricated bearing wear rates in the abrasive conditions most dredgers operate in are typically half that of rubber bearings, reducing maintenance downtime over the life of the vessel.”

With the emergence of more stringent environmental regulations most dredgers are now fitted with seawater lubricated cutterhead shaft and intermediate ladder bearings to mitigate against the risk of polluting ecologically sensitive environments.

Following more than twenty years’ experience with Thordon’s cutter shaft bearings, NMDC is now considering the company’s seawater lubricated cutterhead intermediate lineshaft bearings for several newbuild projects.

 

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