Propeller Shaft Bearings

RiverTough

RiverTough Bearing Installed on Candela S

RiverTough bearings run in combination with hard coated nickel-chrome-boron (NiCrB) Thordon shaft sleeves routinely outlast rubber bearings by a factor of two or more in the most abrasive operating water conditions. RiverTough offers increased resilience compared to rubber bearings offering easier alignment and less edge loading (installation at 3:1 vs. 4:1 L/D ratio).

Thordon RiverTough bearings can be installed using an interference freeze fit or bonded in place using a Thordon-approved adhesive. Interference fit is often recommended for new build installations where the housing bore is consistent and concentric. Bonding is often the best option for repair installations where the housing bore may not be ideal.

SXL

SXL Shaft Bearing Installed

Thordon SXL offers a lower coefficient of friction for reduced break-away torque and smoother operation at lower shaft RPM, increased resistance to third particle abrasive wear and improved wear life compared to XL.

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  • News-Thumbnails-320x160_NWWB21

    Thordon Workboat NewsWorks 2021

    Thordon’s web-based newsletter specifically developed for marine users of oil-free and grease-free bearings in the workboat sector. This newsletter includes feature articles that highlight our successes in the Workboat industry with TG100 shaft seals, RiverTough tailshaft bearings, and other pollution-free Thordon products on the US Inland Waterways, Latin America and around the world.
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Recent Marine News

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  • ThordonNews-Apr25-RT500-thumb

    Thordon Bearings RiverTough Exceeds 500 Installations in Workboat Sector

    May 01, 2025
    In a significant milestone for the company, Thordon Bearings has seen its RiverTough tailshaft bearing solution surpass 500 installations in the workboat sector. Primarily a retrofit solution but also increasingly specified for newbuilds, RiverTough is designed for coastal and inland waterways, where conditions are typically muddy and abrasive. The solution, applied in combination with hard-coated nickel-chrome-boron (NiCrB) Thordon shaft sleeves, has been verified as outlasting rubber bearings by a factor of two or more in the harshest operating environments.
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  • ThordonNews-SXL3-1-thumb

    Thordon Secures Contract to Retrofit Tailshaft Bearings Across Panama Fleet of 32 Tugs

    May 21, 2024
    Thordon Bearings has secured a significant contract to convert the rubber tailshaft bearings across an entire fleet of Panama-operating tugs, pilot vessels, and workboats to water-lubricated polymer bearings. The agreement with the unnamed operator follows the successful retrofitting of Thordon’s SXL tailshaft bearings to twelve of its twin-screw tugs last year during scheduled dry dockings.
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