AHTS Stern Roller Bearings and Seals

Stern roller
SXL Stern Roller Thrust Washers

AHTS vessels do the tough job of setting anchors for drilling rigs, as well as towing mobile drilling rigs and equipment from one location to another.The AHTS stern rollers and seals operate in harsh sea conditions, under high bearing loading, while demanding low maintenance and grease free operation. Thordon provides a reliable and cost effective solution to the traditional metallic or phenolic bearings that require constant maintenance.

  • Able to withstand shock loading and fatigue
  • Abrasive resistance
  • Less rigid - it can deflect slightly
  • Allows better load distribution over the bearing surface



References articles of Thordon commercial Propeller shaft bearings in blue water operation



The final (fully finished) sizing of a Thordon elastomer or ThorPlas bearing can be determined by using the Thordon Bearing Sizing Calculation Program.

To download the Thordon Bearing Sizing Calculation Program Version 2017, Release 10, a user registration is required.

Request Bearing Sizing Program User Registration Number

Download Bearing Sizing Calculation Program (2.2 MB) Version 2017, Release 10


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    Thordon NewsWorks 2018

    Thordon’s web-based newsletter specifically developed for marine users of oil-free and grease-free bearings. This newsletter includes feature articles about seawater being the only commercially viable EAL, new class rules, and Thordon's SeaThigor seal.
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