Newest U.S flagged Lakes bulker operation with Thordon RiverTough bearing

(Posted on 12/08/22)

Mark W. Barker, the first new U.S flagged Great Lakes bulker in almost 40 years, has successfully completed sea trials and will now begin trading throughout the freshwater lakes and river networks with oil-free propeller shaft bearings from Thordon Bearings.

Built in Sturgeon Bay, Wisconsin, by Fincantieri Bay Shipbuilding for The Interlake Steamship Company, Thordon’s scope of supply includes a water lubricated RiverTough bearing, Nickel-Chromium-Boron (NCB) alloy liner for a propeller shaft diameter of 445mm (17.5in), and two Thordon Water Quality Packages. Thordon’s authorized distributor in Ohio, Advanced Sealing Technology, worked with the ship owner to get the RiverTough package specified.

Designed to transport salt, iron ore, stone, and other bulk cargoes throughout some of the narrowest rivers in North America’s Great Lakes region, including the tight bends of the Cuyahoga River, the single screw Mark W. Barker is the 6th Interlake Steamship vessel that Thordon’s proprietary polymer bearings have been installed.

“Interlake has had a lot of success with our propeller shaft bearings,” said Jason Perry, Thordon’s Regional Manager, North America. “Their vessels operate in some of the region’s narrowest, shallowest waterways which means vessels are unable to turn and instead must reverse using bow and tunnel thrusters. When operating at lower shaft speeds, the RiverTough polymer formulation reduces friction and bearing wear. The material can also withstand operations in highly abrasive, very sandy environments.”

Wear rates for RiverTough are typically less than half that of rubber bearings based on ship owner feedback. Offering increased resilience, easier shaft alignment and less edge loading, lubricants in the polymer material reduce friction levels during nearly-dry starts, significantly eliminating stick-slip and vibration at low shaft speeds. Results from shipowners have shown wear rates of 0.075mm to 0.100mm (0.003in to 0.004in) in 6000 to 7000 hours of annual use.

Commenting on Interlake’s long-term relationship with Thordon, Ian Sharp, Interlake’s Director of Fleet Projects, said: “From the outset, Thordon always responds quickly to our requirements with its bearing expertise, technical know-how and customer service. Having multiple RiverTough bearings in operation with proven reliability made it a very simple decision to choose the same Thordon bearing for our new ship.”

With a hull optimized for energy efficiency the 28,000dwt River-class bulker is powered by a pair of 400HP main engines driving a single controllable pitch propeller through twin-input, single out-put reduction gearbox. It is the first ship to operate on the Great Lakes with engines that meet EPA Tier 4 emissions standards.

EPA Tier 4 standards entered into force in January 2017, requiring marine engines rated at 600kW and above to be fitted with technologies capable of significantly reducing nitrogen oxide (NOx), sulphur dioxide (SOx) and particulate matter (PM).

Craig Carter, Vice President Business Development added: "Mark W. Barker is truly a milestone ship for Interlake and we are proud to be associated with what is arguably one of the most advanced, energy efficient self-unloading bulkers to operate on the Great Lakes.

“Our relationship with Interlake Steamship and Bay Shipbuilding dates back to 1998 when we installed propeller shaft bearings to the 25,000dwt Kaye E. Barker. Since then, we have enjoyed a very productive, collaborative relationship with both owner and yard and look forward to working together on future projects.”

Latest News

New leadership team elected at INTERCARGO

INTERCARGO, the International Association of Dry Cargo Shipowners, has announced significant changes... Read more

Core Power ramps up Japan operations as US$500m funding round nears completion

CORE POWER is building the world’s first Maritime Civil Nuclear Programme in the OECD with a potential... Read more

Concern over RightShip's age limit reduction for Bulker vetting inspections

The International Association of Dry Cargo Shipowners (INTERCARGO) members have voiced deep concerns... Read more

Four Damen Combi Freighter 3850s ordered by Reederei Bernd Sibum

German family-owned shipping company, Reederei Bernd Sibum, has placed an order with Damen Shipyards... Read more

ClassNK’s world first notation for ships using green steel for NYK Bulker

ClassNK has granted the class notation ‘a-EA (GRS)’ to ‘BRIGHT QUEEN’, the bulk... Read more

Veson: Decarbonisation regulations reducing average speed of bulker fleet

Estimated carbon emissions from bulk carrier vessels have fallen by 5 million tonnes, or 2.5%, since... Read more

Danica and IMEQ collaborate for safety and wellbeing

Danica Crewing Specialists has partnered with the Innovative Maritime Emotional Intelligence Centre (... Read more

Unprecedented insight into connectivity and wellness at sea

Unique data is being used to create a series of ‘snapshots’ into the state of the maritime... Read more

Fleet Management Limited appoints Chief Executive Officer

Fleet Management Limited, a part of The Caravel Group Limited, has announced the appointment of Captain... Read more

Caribbean states join together to call for fuel levy

Caribbean states have joined forces to ensure the views of Small Island Developing States (SIDS) are... Read more