Shaft Seals News

The International Association of Classification Societies (IACS) has published a new Unified Requirement, UR M85, providing comprehensive technical guidelines for type approval testing of synthetic materials used in aftmost propeller shaft bearings.Recognized as a critical component of a vessel’s propulsion system, these bearings are essential for long-term operational safety and efficiency.The new UR M85 establishes a robust framework for type approval testing to address what it says is a vital gap in maritime standards.

30 years ago shaft generators with PTI capability kept container ships sailing at top speed. That purpose gone, PTI/PTO is making a new comeback in more cargo shipping segments, this time for reducing emissions.Retrofitting a shaft generator is not an insignificant undertaking. Around 50 tons of equipment needs to be installed into the engineroom through a hole in the hull. A new section of shaft is usually required.That a few shipowners are undertaking such projects - Klaveness Combination Carriers on the Ballard…

Thordon Bearings and Wärtsilä have announced the formation of the Blue Ocean Alliance to develop and promote a stern tube-less ship concept.The Blue Ocean Alliance brings together Thordon Bearings, Wärtsilä, the School of Naval Architecture & Marine Engineering of the National Technical University of Athens (NTUA), naval architect SDARI (Shanghai Merchant Ship Design & Research Institute CSSC) and ABS.The companies say that the concept of a ship design that does not require a…

Thordon Bearings said ABS issued an Approval in Principle to the “sterntube-less ship” concept developed in cooperation with the Shanghai Merchant Ship Design & Research Institute (SDARI), the National Technical University of Athens (NTUA) and Thordon Bearings Inc.The design replaces a vessel’s sterntube with an irregular shaped chamber that allows a shorter, water-lubricated propeller shaft to be inspected and maintained while the vessel is afloat, without having to withdraw…

Thordon Bearings has debuted a new propeller shaft seal for the commercial shipping industry featuring a unique Safe Return to Port (SRTP) design.Completing the COMPAC open seawater lubricated propeller shaft bearing system, Thordon's new BlueWater Seal is described by the manufacturer as a cost effective, commercial grade axial lip seal specifically designed for merchant shipping fleets. It incorporates Thordon’s emergency SRTP capability, first used in the company’s TG100 and…