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 Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter May 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Ship Repair & Conversion

Turkey to Modernize Pakistan’s Subs

The Turkish defense firm Defense Technologies and Engineering (STM) won the tender to modernize Pakistan's submarines against its French competitor DCNS, reports Daily Sabah.

Turkey Launches F-513 TCG Burgazada

Turkish Navy’s third Milgem class corvette, the F-513 TCG Burgazada, created as part of the MILGEM project, was launched with a ceremony attended by Turkish President

SeaPro FourStroke Making Gains in the Commercial Market

Mercury Marine’s family of SeaPro FourStroke outboard engines is suited for high-hour applications and harsh environments, according to the manufacturer, who said

Dredging

Damen Wins Best Paper Award at WODCON

At the WODCON 2016 held last week in Miami, Damen was awarded the “Best Paper Award” for a paper on efficient dredge pump design, written and presented by Klaas Slager.

Trelleborg Debuts New Dredging Hose in China

Trelleborg’s engineered products operation is now manufacturing a pre-bend rubber dredging hose in China – the only one of its kind available in the country, according to the manufacturer.

MTG Presents Latest Dredging Solutions in Miami

MTG attended the Wodcon XXI World Dredging Congress and Exhibition from June 13-17, 2016, introducing its latest solutions for the dredging market.   The new MTG Systems DMet is a G.

Marine Equipment

ABP orders Two Gottwald cranes

Terex Port Solutions (TPS) has received an order from Associated British Ports (ABP) for two electric Terex Gottwald Model 8 portal harbour cranes in the G HSK 8424 B four-rope grab variant.

Austal Delivers LCS 8 to US Navy

Austal Limited (Austal) (ASX:ASB) delivered the future USS Montgomery (LCS 8) to the U.S. Navy, during a ceremony held aboard the ship at Austal USA’s shipyard in Mobile, Alabama, USA on 23 June.

POSH Bags Shell FLNG Contract

Singapore’s offshore marine services provider PACC Offshore Services Holdings Ltd. (POSH) has been awarded a contract to support Shell’s Prelude floating liquefied

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Standards Navigation Offshore Oil Pipelines Salvage Ship Electronics Sonar Winch
rss | archive | history | articles | privacy | 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: 0.1371 sec (7 req/sec)