Bühler GmbHSailors SocietyPort of South LouisianaPort of StocktonTMS Awards 2023Vigan
  • Van Aalst
  • Cimbria
  • Port of South Louisiana
  • Vigan
  • Telestack
  • Sailors Society

Yards specify Thordon system

Yards specify Thordon system

(Posted on 28/02/20)

Thordon Bearings’ ThorPlas-Blue has established itself as the bearing of choice for deck equipment, with European shipyards and owners frequently specifying the grease-free bearing system as standard for vessels’ winches, fairleads, davits, capstans and windlasses.

Sweden’s Falkvarv AB, Oresund Dry Docks, and the Oskarshamnsvarvet shipyard have been particularly strong proponents of the grease-free bearing, with these yards maintaining an inventory of ThorPlas-Blue stock with which to replace worn and costly bronze bearings and bushings when vessels drydock for repairs.

Tommy Holmgren, Sales Director, Duwel Group, Thordon’s authorised distributor in Sweden, said: “The ThorPlas-Blue inventories these yards keep could be indicative of the number of vessels drydocking with bronze bearing problems since approximately 96% of the inventory is used to replace the greased bearings in mooring winches.

“Since Falkvarv first retrofitted ThorPlas-Blue bearings to the mooring winches aboard two coastal tankers the yard has always recommended that ship owners retrofit the non-metallic bearing to their vessels. It is the same with the Oresund and Oskarshamnsvarvet yards.”

ThorPlas-Blue is a simple-to-machine-and-install self-lubricating bearing so does not require any lubricating grease. The economically and environmentally acceptable solution is especially pertinent to sensitive areas like the Baltic Sea.

Outside the Baltic area, Romania’s Constanta Shipyard has just completed the retrofit installation of ThorPlas-Blue bearings to deck winches and windlasses aboard a 105,042dwt Aframax tanker operated by a Greece-based ship manager.

This project followed a similar retrofit in July 2018 to a sistership at a Piraeus drydock, where anchor and mooring winch bearings were replaced with the Thordon solution.

The 105,459dwt tanker reported pieces of metal on deck and excessive bearing clearances in bronze rope drum bearings. The biggest clearances were recorded in the port and starboard anchor winches and the forward starboard mooring winch. Five shafts were dismantled and inspected, with excessive wear and corrosion recorded on the shaft journals, reaching up to 4.50mm (0.18 in) in diameter.

All in all, twelve bronze bushings were replaced with the self-lubricating ThorPlas-Blue bearing, each of which was machined to achieve 0.3mm (0.01in) final interference (running) and shrunk to fit housings using solid carbon dioxide (dry ice).

Commenting on the project, George Morrison, Thordon Bearings’ Regional Manager, said: “We have been steadily replacing the bronze bushes in deck machinery across this ship manager’s fleet over the past five years and now have the Thordon solution installed aboard in over 30 vessels.

“The bronze bushes created problems when they came in contact with seawater – a chemical reaction resulting in oxidization. They were becoming too costly to repair and maintain. The ship manager has had very good results with the Thordon system, with no wear or damage. They have also proven very easy to maintain.”

Morrison intimated that the Thordon system could soon be specified for vessels’ steering gear. “We are currently carrying out load analysis of the steering gear on a number of vessels,” he said.

Latest News

Weathernews enhances SeaNavigator platform with powerful new tools

(Posted on 19/06/24)

In line with its focus on continuous improvement of its cloud-based SeaNavigator voyage-optimization... Read more


BOA: Ships should be built to seawater-lubricated sterntubeless design

(Posted on 14/06/24)

Future newbuild ships of all types should be built without a sterntube and with a seawater-lubricated... Read more


Survitec white paper calls for greater oversight for fire safety inspections

(Posted on 07/06/24)

Global Survival Technology solutions provider Survitec has highlighted the dangers of inadequate maintenance... Read more


Making sense of real-time load measurement

(Posted on 07/06/24)

The handling of dry bulk materials used to be a completely manual process, but it is now being increasingly... Read more


Laskaridis Shipping and Metis to find pathways to low carbon future

(Posted on 01/06/24)

A research project which brings together The Cambridge Centre for Advanced Research and Education in... Read more


BWM delivers dust suppression system at Fraser Surrey docks

(Posted on 31/05/24)

Australia based Blue Water Misting (BWM) has delivered and commissioned a dust suppression system at... Read more


A new era in ballast water management

(Posted on 31/05/24)

Alfa Laval PureBallast 3 Ultra is the latest ballast water management system (BWMS) built on proven... Read more


New Ro-Ro Radial Telescopic Unit continues Telestack innovation

(Posted on 28/05/24)

Telestack are launching the NEW TSR 40 Radial Telescopic, the only Roll On-Roll Off (Ro-Ro) Radial Telescopic... Read more


Florida port orders two Konecranes Gottwald Generation 6 MHCs

(Posted on 28/05/24)

SeaPort Manatee will bring extra capacity to general cargo and container handling at their operations... Read more


Liebherr-MCCtec GmbH honoured again with EcoVadis gold medal

(Posted on 28/05/24)

Liebherr-MCCtec GmbH has once again achieved the gold medal, which is reserved for the top 5% of all... Read more


TBA GroupVan AalstGeneva DryCimbriaTelestack
  • Port of Stockton
  • Geneva Dry
  • TMS Awards 2023
  • Bühler GmbH

Subscribe to our newsletter

Keep up to date with the latest global news in bulk cargo handling and shipping