Saturday, June 15, 2024

Craig Carter News

Shaft removal during stern tube repair procedures courtesy of Marine and Industrial Transmissions.
Photo courtesy Marine and Industrial Transmissions

Is Stern Tube Damage Declining?

It might be easy to blame EALs, but the ongoing causes of stern tube damage are varied, and possibly declining.Environmentally Acceptable lubricants (EALs) gained market traction with the introduction of US VGP regulations in 2013. Since then, DNV has observed two major trends. The first, starting in 2013 was early life damage, either during sea trials or within the first five years of operation, where aft stern tube bearings typically failed under extreme load conditions. Then from around 2018…

(Image: Thordon Bearings)

ClassNK Amends Rules for Seawater-lubricated Shafts

Nippon Kaiji Kyokai (ClassNK) has joined the major classification societies to amend its rules relating to the inspection of seawater-lubricated propeller shaft systems.The amendment means that ships with open seawater-lubricated propeller shafts that are built to ClassNK rules are subject to the same 15-year shaft withdrawal inspection periods as oil-lubricated shafts and sterntubes, subject to monitoring criteria.The announcement brings ClassNK’s requirements in line with those of other large class societies…

(Image: Thordon Bearings)

Water Lubricated Propeller Shaft Bearings Reduce Fuel Use -Study

Peer-reviewed research by Thordon Bearings into the hydrodynamic lubrication efficiency of a ship’s propeller shaft bearing has found that the use of seawater-lubricated elastomeric polymer bearings reduces fuel consumption.The environmental and financial benefits of adopting a seawater-lubricated propeller shaft system are well documented, but this is the first indication that the arrangement reduces hydrodynamic resistance enough to improve fuel consumption, compared to a conventional…

Thordon’s SXL Bearings Installed on History-making Ferry Daleela

Thordon Bearings’ Egyptian distributor and integrated services provider Nefertiti Marine has commissioned the water lubricated Thordon SXL propeller shaft bearings installed aboard the 24,112gt ferry Daleela.The 1991-built, 400-passenger capacity RoPax, owned by El-Etehad International and chartered to Scandro Holdings, began operations on the revived Piraeus–Limassol route in June 2022 following an extensive refit in the floating dock operated by the Suez Shipyard in Egypt.Nefertiti Marine supplied a total of 14 Thordon SXL forward…

(Photo: Thordon Bearings)

Thordon Bearings Unveils New Water-lubricated Shaft Seal

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…

Thordon’s seawater lubricated propeller shaft bearing system eliminates oil pollution from the ocean and waterways (Image: Thordon Bearings)

Thordon Expresses Concern Over New VIDA Proposals

Thordon Bearings has added to the growing concern over proposed changes to Vessel Incidental Discharge National Standards of Performance (VIDA) requirements, citing far reaching environmental consequences if clauses in the existing document are removed.In a statement submitted to the U.S. Environmental Protection Agency (EPA) on November 20, 2020, the Canada-based bearings and seals pioneer “strongly questions the removal of some text” in the proposed amendments, stating that…

A Thordon COMPAC installation (Photo: Thordon Bearings)

Oil-to-water Conversions Success for Great Lakes Bulkers

The oil-to-water lubricated tailshaft conversion Thordon Bearings carried out last year to the 26,260dwt Great Lakes Fleet-managed bulk carrier SS John G. Munson has successfully completed its first season as a diesel-powered ship.The shaft conversion of the 1952-built self-unloader formed a key part of the mammoth 12-month power conversion project completed last year by Fincantieri’s Bay Shipbuilding yard, in Sturgeon Bay, Wisconsin, U.S.The vessel’s steam propulsion plant was replaced with an energy efficient medium-speed diesel arrangement.

Thordon Unveils New Bearing Information Portal

Thordon Bearings has unveiled a new web-based platform to provide all the information industry professionals need to know about the commercial, technical and environmental advantages of using grease-free and water-lubricated polymer bearings across a wide variety of applications.Covering all of Thordon’s target market sectors, the new website has been designed to provide shipowners, shipyards and propulsion system integrators, in particular, with the information they need to make more informed procurement decisions…

Thordon’s SeaThigor up for Environmental Award

SeaThigor, the forward propeller shaft seal Thordon Bearings introduced to the market last year, has been nominated in the technology category of the Green4Sea awards, which will take place in Athens this April. Officially unveiled at Hamburg’s SMM exhibition, last September, the SeaThigor forward seal has been cited as “raising the bar in dynamic and static seal design”. It incorporates an ingenious secondary seal module to provide Safe-Return-To-Port capability in the event of a face failure of the primary seal.

Thordon Advises WOC on Operational Oil Issue

Addressing the more than 200 delegates at the World Ocean Council’s (WOC) fourth Sustainable Ocean Summit (SOS16) last week, Thordon Bearings advised representatives of international organizations, government agencies, industry and academia about the damage of oil-lubricated propeller shaft systems on the marine environment. Thordon Bearings’ Director of Marketing and Customer Service, Craig Carter, explained that the fleet of 45,000 oceangoing vessels that continue to operate…

Image: Thordon Bearings

Pods Versus Water Lubricated Props

Thordon Bearings has called on the marine industry to investigate the characteristics of both conventional seawater-lubricated propeller shaft systems and podded propulsion arrangements in order to provide shipowners with a better understanding of the two very different propulsion configurations. In a recently published White Paper, the Canadian manufacturer of the COMPAC seawater-lubricated propeller shaft bearing system believes there is a great opportunity for independent comparative data so that cruise ship operators, in particular, can make more informed procurement decisions.

Thordon Bearings Launches Oil Savings Calculator

Thordon Bearings has developed a bespoke modeling tool capable of calculating the amount of operational oil prevented from leaking into the world’s oceans with each installation of a seawater-lubricated propeller shaft bearing. To be launched officially on April 22 to coincide with Earth Day 2016, the world’s largest environmental movement, now in its 46th year, the Oil Savings Calculator shows that more than 60 million liters of oil pollution has been saved to date. “In our opinion the only acceptable propeller shaft stern tube oil leakage is zero.” said Terry McGowan…

Artist impression of Matson’s Aloha-class containership (Image: Matson)

Thordon’s COMPAC for US’ Largest Containerships

Thordon Bearings has signed a contract to supply COMPAC seawater-lubricated propeller shaft bearing solutions to two Jones Act containerships under construction at the Aker Philadelphia Shipyard Inc. (APSI) for Matson Navigation Company, Inc. The order represents the first large containership reference for the manufacturer and the largest commercial ship propeller shafts to be fitted with COMPAC bearings, Thordon noted. The 3600TEU Aloha Class vessels, the largest Jones Act containerships ever built…

Thordon Bearings’ seawater-lubricated propeller shaft bearing system meets classification society rules for extended shaft withdrawal periods (Image: Thordon Bearings)

New Class Rules Favor Seawater Lubricated Props

Classification societies are changing their monitoring rules for seawater-lubricated propeller shafts in line with the rules governing the inspection and withdrawal of oil-lubricated stern tube systems. China Classification Society (CCS), for example, announced in July that if certain condition monitoring criteria are met, shaft withdrawal for inspection may be extended to 15 years. The rule change follows recent revisions by Lloyd’s Register and Bureau Veritas which published amended SCM and MON-SHAFT rules in January 2013 and January 2014, respectively.

An artist’s impression of the VG EcoCoaster  design (Photo: Thordon Bearings)

Thordon's Compac Ordered for 2 EcoCoasters

Thordon Bearings’ Swedish distributor, Duwel Sweden, has signed a contract with Caterpillar Propulsion for the supply and installation of Thordon COMPAC seawater lubricated propeller shaft bearing systems to the two general cargo ships Dutch shipyard Royal Bodewes is building for Finland’s Meriaura Group. Each state-of-the-art 4700 dwt VG EcoCoaster, designed by Meriaura Group together with partners Foreship and Aker Arctic Technology, will feature COMPAC bearings, a Thordon Water Quality Package and a forward shaft seal in order to exceed current and anticipated environmental regulations.

Photo: Thordon Bearings

Thordon Bearings Bags Alaska Ferry Contract

Thordon Bearings has received an order to supply its COMPAC system to two Alaska Ferry newbuilds under construction at the Vigor Industrial shipyard in Ketchikan, Alaska. The Canada-based company, a supplier of seawater-lubricated propeller shaft bearings, will deliver the Environmentally Acceptable Lubricant (EAL)-compliant COMPAC propeller shaft bearing system for shaft diameters of 267mm. The twin-screw, 280ft long Alaska-class ferries will each have capacity to carry 300 passengers…

Photo: Thordon Bearings

Thordon Reports Big Orders from Chinese Shipyards

Thordon Bearings has received an order for a total of 20 seawater-lubricated COMPAC Propeller Shaft Bearing Systems for Chinese shipyards, marking the Canadian company’s most significant order for commercial vessels. Thordon Bearings, a manufacturer of advanced seawater-lubricated stern tube bearing systems, will supply COMPAC and Thordon Water Quality Packages for installation to various merchant and offshore newbuilds under construction for an undisclosed Chinese shipowner.

Cost comparison of stern tube lubricants (Image courtesy of Thordon Bearings)

‘Seawater is the Ultimate EAL’

Thordon Bearings Inc., a manufacturer of seawater lubricated bearings for the global marine industry, has questioned the rise of environmentally acceptable lubricants (EALs) in oil-based stern tube seals and bearings, stating the industry can use “the most environmentally safe lubricant” there is: seawater. The U.S. Environmental Protection Agency (EPA) is enforcing regulations introduced in December 2013 that stipulate that all vessels over 24 meters in length operating in U.S. waters must switch over to EALs in all oil-to-sea interfaces before their next drydocking.