Cutterhead Shaft Bearings Last 9 Years on Dredger

Posted by Eric Haun
Thursday, August 07, 2014
Thordon Composite cutterhead shaft bearings prior to installation on the D’Artagnan owned by DEME

Water lubricated Thordon Composite cutterhead shaft bearings have performed well for nine years on one of the largest cutter suction dredgers in the world–Dredging, Environmental and Marine Engineering N.V. (DEME)’s D'Artagnan (28,200 kW total installed power).

The vessel had a major dry docking at Drydocks World-Dubai in February 2014 where the shaft was removed, and bearings and shaft inspected. Originally built in 2005, the D'Artagnanself-propelled cutter suction dredgeris involved in very heavy rock-breaking having a cutting power for operations in rock soils of 6000 kW.  “The bearings performed well and have shown a positive wear life compared to grease lubricated metallic bearings,” said Frederik Mertens, Assistant Vessel Manager at DEME.

The decision was made to replace the cutterhead shaft bearings. The same Thordon Composite bearings are also installed on the intermediate ladder shaft bearings. Mertens said, “For the intermediate ladder bearings we noticed even less wear on the Thordon bearings than the cutterhead bearings so we did not replace them.” Grease-free Thordon SXL wire rope sheaves were also installed during the drydocking.

Thordon’s authorized Distributor in the U.A.E., Ocean Power International (OPI), assisted Drydocks World and Dredging International (DEME’s subsidiary) in the replacement with additional supervision during, and prior to, installation.

Thordon Composite has been consistently outperforming rubber in dredge cutterhead bearing applications since it was introduced in the 1970s, the manufacturer said. Composite bearing wear rates in dirty abrasive conditions are typically half that of rubber bearings, reducing maintenance downtime over the life of the vessel. The inspected bearings confirmed that the Thordon Composite grade can withstand the most abrasive conditions typical for a dredger equipped for working in various mediums. “Compared to expensive bio-degradable greases, these water lubricated bearings from Thordon are a real cost saving alternative,” Mertens said.

Thordon Bearings Inc. designs and manufactures a complete range of polymer bearing and shaftline products for the marine, clean power generation, pump, offshore and industrial markets. Thordon’s strong and recognizable global brand is known for high quality and superior performance, eliminating oil and grease from bearing applications in ships, hydro-turbines, vertical pumps and many other marine applications.

thordonbearings.com
 

  • Thordon Composite dredge cutterhead bearings

    Thordon Composite dredge cutterhead bearings

Maritime Reporter October 2013 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Ship Repair & Conversion

Henderson, Hanes & Associates Opens Doors in Miami

Ocean Engineering/ Naval Architecture Firm Brings Innovation to the Mega Yacht Community The Miami-based ocean engineering and naval architecture firm of Henderson & Associates, Inc.

Scanjet Secures 30-ship Tank Management Order

Scanjet Group has followed up its Tank Management order from Stolt-Nielsen with a series of contracts for its ITAMA Intelligent Tank Management concept including Tankcleaning,

Industry Professionals to Speak at ShipConstructor Conference

The speakers representing various companies at next week's SSI Americas ShipConstructor User Conference, October 7-9, 2014 in Mobile, Alabama, demonstrate SSI's

Dredging

Nigerian Customer Orders Ninth Damen Dredger

A Nigerian customer has added its ninth Damen dredger to its fleet. The Cutter Suction Dredger type CSD500 was chosen due to the availability of Damen Field Services in Nigeria,

GLDD, ESG in Steel Cutting Ceremony

Eastern Shipbuilding is pleased to announce that on, Monday, September 15, 2014, Great Lakes Dredge & Dock Company, LLC “(Great Lakes”) (NASDAQ: GLDD) and Eastern Shipbuilding Group, Inc.

Eastern Shipbuilding Start Construction of Dredge Barge ATB for Great Lakes

Eastern Shipbuilding is pleased to announce that on, Monday, September 15, 2014, Great Lakes Dredge & Dock Company, LLC  and Eastern Shipbuilding Group, Inc.

Marine Equipment

NAVTOR, AWT Agreement Marks Next Step in E-navigation

NAVTOR has signed an agreement with maritime weather routing specialist Applied Weather Technology (AWT) that will see the two companies integrating their services

Going Big for Sustainability

Orkot Marine Bearings, developed and manufactured by Trelleborg Sealing Solutions, contribute to the build of the world’s largest and most efficient containerships,

MAN Propulsion Packages for New Trawler Series

Orders for five fresh-fish trawlers feature two different ship designs and MAN 6L27/38 engines and aft-ship equipment Icelandic owners, HB Grandi, Vinnslustodin hf.

 
 
Maritime Careers / Shipboard Positions Naval Architecture Navigation Pod Propulsion Port Authority Salvage Ship Repair Ship Simulators Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.3351 sec (3 req/sec)