The Wolfson Centre for Bulk Solids Handling Technology Bühler GmbHPort of StocktonTelestackCimbriaPort of South Louisiana
  • TOC Events
  • Port of South Louisiana
  • Bühler GmbH
  • Cimbria
  • Port of Stockton
  • Telestack

Thordon save owners' costs on Mississippi

Thordon save owners' costs on Mississippi

(Posted on 22/05/20)

The final vessel in a series of five ship-assist tugs has been successfully converted to Thordon’s RiverTough tailshaft bearings and TG100 shaft seals and has returned to work on the Mississippi River.

These five tugs are considered to be the first ship-assist tugs operating in the lower Mississippi fitted with both RiverTough bearings and TG100 seals.

The New-Orleans-based tug operator converted its first vessel – a 117ft (35m), 4200hp twin-screw ship-assist tug – in 2015 to reduce the operating and maintenance costs associated with traditional rubber tailshaft bearings and clad welded journals.

According to Thordon Bearings’ Sales Manager, Jim Bright, who was involved in all five retrofits, the owner specified the solution because it was tired of unbudgeted costs following frequent premature bearing and shaft wear. The owner was familiar with the reputation of RiverTough bearings and its performance on other workboats.

“Their previous arrangements of rubber bearings had to be replaced every two years or so and the shafts needed to be repaired due to excessive wear. This can be avoided with Thordon’s products,” said Bright.

When RiverTough bearings are used by workboats, they routinely provide wear rates of 0.003" to 0.004" (0.075mm to 0.100mm) in 6000 to 7000 hours of annual use on the Mississippi River.

This upgrade was the first ship-assist tug in the New Orleans Port to change over to Thordon.

"We proposed retrofitting the RiverTough tailshaft bearing in conjunction with a ThorSleeve hardened shaft sleeve, and a TG100 shaft seal. This is a much more suitable shafting solution for vessels operating in abrasive rivers like the Mississippi,” Bright stated.

However, during discussions with the owner it emerged that a different installation method was required.

The traditional approach of casting Chockfast (an epoxy resin) directly to the outside diameter of the bearing meant that the Chockfast resin had to be chiseled out each time the existing rubber bearing needed replacing.

A new rubber bearing would have to be installed every 18-24 months. The bearing would have to be aligned and new Chockfast cast around them. This added to the time that the vessel was docked for repairs which in turn meant additional costs. When you factor the lost charter work into the equation, this process can be very costly for the ship owner.

Thordon’s solution was to create a permanent housing using the Chockfast epoxy grout.

Latest News

Inmarsat joins with Sailors’ Society to support seafarer wellness

(Posted on 05/08/22)

Global, mobile satellite communications company Inmarsat is lending its support to seafarer welfare... Read more


Nippon Paint introduces new PSPC-compliant universal primer for newbuilds

(Posted on 29/07/22)

Global coatings pioneer Nippon Paint Marine has added a new anti-corrosive universal primer to its E... Read more


Orders received and order book at new record for Cargotec

(Posted on 25/07/22)

Cargotec’s half-year financial report January–June 2022 has revealed that supply chain challenges... Read more


Neighbouring ship owners order four Damen Combi Freighter vessels

(Posted on 18/07/22)

One hundred and ten year old ship management company Reederei Wessels recently made the same purchase... Read more


It takes two to tango

(Posted on 18/07/22)

Port Esbjerg is the leading port in Europe when it comes to handling and shipping wind energy components... Read more


Reederei Gerdes orders second Damen Combi Freighter

(Posted on 01/07/22)

German short sea shipping specialist ship owner company Reederei Gerdes signed the order for Damen Cargo... Read more


Inmarsat and Thetius explore human element in maritime digitalisation

(Posted on 01/07/22)

 A new report published by Inmarsat, the world leader in global, mobile satellite communications... Read more


Voyage calculations made instant

(Posted on 30/06/22)

AXSMarine, a pioneer and market leader in the provision of advanced solutions for shipping professionals... Read more


Bruks Siwertell commissions new cement unloading system for Colonial

(Posted on 26/06/22)

Bruks Siwertell has completed the installation of a new high-capacity Siwertell ship unloader at Colonial... Read more


Desmi is sold to One Equity Partners

(Posted on 26/06/22)

DESMI, a Danish manufacturer of pumps, pumping systems, environmental cleaning equipment and related... Read more


Sailors SocietyCleveland Cascades LtdViganTOC EventsTBA GroupMultimodal 2022
  • Multimodal 2022
  • Cleveland Cascades Ltd
  • TBA Group
  • Sailors Society

Subscribe to our newsletter

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