May 08, 2012
(Thordon in the News)
(The Naval Architect, May 2012) Seawater lubricated propeller shaft bearings use no oil-based lubricants and can bring 0-EI (zero environmental impact) below the waterline, writes Craig Carter, Director of Marketing at Thordon Bearings, following the company's presentation to the IMO's DE56 meeting in February.
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April 02, 2012
(Blog Posts)
Can this all be true? If you are like the majority of global ship owners using oil lubricated white metal propeller shaft bearings, the cost of aft seal maintenance and the risk of oil discharges from a stern tube is always present. However, if you look at Canadian bulk carrier owners, Algoma Central Corp. and Canada Steamship Lines (CSL), both are benefiting from the decision to use the pollution free propeller shaft bearings systems on their new ships.
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March 28, 2012
(Blog Posts)
Another article has recently been published providing decent information on the Vessel Discharge Evaluation and Review Act in the United States. As it relates to the VGP, oil-based lubricants ARE considered to be pollutants so don’t be fooled into thinking that pollution-free alternatives do not exist.
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May 25, 2011
(Blog Posts)
The MV Algorail is a single screw, 194m (638 ft.) self unloading cargo vessel operating on the Great Lakes and St. Lawrence Seaway. The 43 year old Laker was recently docked at Seaway Marine and Industrial (SMI) in St. Catharines, Ontario, Canada.
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April 11, 2011
(Blog Posts)
The Company of Master Mariners of Canada are holding an international conference on Shipping and Environmental Issues in 2011 on June 6-8, 2011 in Halifax, Nova Scotia, CANADA.
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April 06, 2011
(Blog Posts)
There are several types of rudders on the market – some built by OEM’s such as Becker or Van Der Velden and others built by shipyards throughout the world.
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February 25, 2011
(Blog Posts)
It’s hard to interpret what a “Green Ship” means these days.
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December 29, 2010
(Blog Posts)
A recent marine propulsion discussion on LinkedIn raised the issue that seawater lubricated propeller shaft bearings were not proven on larger shafts
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December 10, 2010
(Press Releases)
Istanbul Naval Shipyards has installed Thordon COMPAC seawater lubricated propeller shaft bearings on the new Turkish Navy Milgem Frigates.
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December 08, 2010
(Blog Posts)
Thordon recently attended the 2010 International Workboat Show in New Orleans, Louisiana
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November 30, 2010
(Blog Posts)
As you know, most of the world’s commercial shipping fleet use a white metal oil lubricated bearing to support the propeller shaft.
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November 17, 2010
(Blog Posts)
As previously noted, higher bearing pressures require higher speeds before the bearing becomes hydrodynamic. Therefore, sizing the bearing correctly for the expected load is important for several reasons:
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November 16, 2010
(Blog Posts)
As mentioned previously, theoretically you can use any fluid to create a hydrodynamic bearing, but each fluid has limitations on the load and speed that it is capable of supporting.
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November 12, 2010
(Blog Posts)
When discussing water lubricated propeller bearings with other engineers or designers, we often talk about establishing “lift” in the bearing, or the importance of keeping shaft rpm above a certain “threshold speed”. What we are really talking about is the creation of a very thin film of water between the shaft and the bearing surface which allows the bearing to carry the load with low friction and minimal wear.
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November 09, 2010
(Blog Posts)
Recently, we have had some ship owners/managers raise the concern that the price the newbuild shipyard was charging to install a COMPAC seawater lubricated stern tube bearing system was higher than the oil lubricated white metal bearing system
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November 04, 2010
(Thordon in the News)
(Marine Engineers Review) October 2010, Dutch company Flinter has specified a Thordon COMPAC stern tube for the 20th time,
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November 01, 2010
(Blog Posts)
I just returned from a recent visit to New Zealand and Hamilton Water Jet - the designer of the world's first water jet propulsion system. Just to give this perspective, when Hamjet first developed the pump-like system for propelling small water craft, they ran a shake-down cruise on the Ganges back in the 1950's. Sir Edmund Hillary was at the controls of one of the boats.
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September 20, 2010
(Thordon in the News)
(Marine Propulsion, Aug/Sept 2010)The 'zero tolerance' of ship source pollution increasingly being pursued by authorities applies equally to all ships, and the prospect of eliminating a pollutant source entirely below the waterline is an attractive one.
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August 05, 2010
(Blog Posts)
In June at the AMOP Technical Seminar on Environmental Contamination and Response in Halifax, Nova Scotia, Canada, DR. Dagmar Etkin of Environmental Research Consulting (New York, USA) presented a paper on oil discharges from ships in ports in the USA.
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June 25, 2010
(Thordon in the News)
(Internation Bulk Journal, Issue 3) U.S. Gypsum Corp. uses Thordon COMPAC seawater lubricated propeller shaft bearings in second ship.
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June 08, 2009
(Thordon in the News)
(Maritime Executive May-June 2009) Stern Tube Oil Pollution Is Just One of Many Reasons to Make the Switch to Seawater-Lubricated Stern Tube Bearings.
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March 30, 2009
(Thordon in the News)
(The Waterways Journal, March, 2009) Article on Blessey Marine Services mv.Alton St. Amant equipped with Thordon Bearings
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February 04, 2009
(Press Releases)
T Mariotti Shipyard of Genova, Italy has recently installed Thordon COMPAC seawater lubricated propeller shaft bearings on the Seabourn Odyssey 50,000GT cruise ship being built for Seabourn Cruise Lines, the Carnival Corporation luxury brand, for June 2009 delivery. This is the eleventh Carnival Corp. owned ship fitted with COMPAC seawater lubricated bearings since the first installation in 1998 on Grand Princess. Thordon COMPAC has also been ordered for the sister ship, Seabourn Sojourn, to be delivered in June 2010.
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December 01, 2008
(Press Releases)
Schelde Naval Shipbuilding in Vlissingen, Netherlands will fit Thordon seawater lubricated COMPAC propeller shaft bearings to four Patrol Vessels that will be built for the Royal Netherlands Navy.
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September 09, 2008
(Press Releases)
Fincantieri’s Sestre Ponente Shipyard in Genoa, Italy, has ordered Thordon seawater lubricated COMPAC propeller shaft bearing systems for two new 66,000 GT Oceania-Class cruise ships being built for Oceania Cruises for 2010 and 2011 delivery, with an option for a third ship. Designed to cruise to all corners of the globe, the new ships will have zero risk of stern tube oil pollution and no aft seals, meaning lower maintenance costs.
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July 30, 2008
(Press Releases)
To demonstrate to commercial ship owners that modern seawater lubricated propeller shaft bearing systems do offer wear life predictability, reduced operating costs and elimination of stern tube oil pollution risks, Thordon Bearings has introduced a 15-year bearing wearlife guarantee for its COMPAC pollution free stern tube bearings.
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March 08, 2007
(Thordon in the News)
(Warship Technology, March 2007) Thordon XL propeller shaft bearings have helped solve a stern tube problem that had plagued the US Coast Guard icebreaker Polar Sea since 1992.
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