Vesconite Bearings is proud to have supplied its largest-ever machined stern tube bearing from the long-life, wear-resistant, no-swell bearing material Vesconite Hilube.
The order was completed with the assistance of a recently-purchased six-meter centre lathe, which is part of Vesconite Bearings’ newly-introduced extra-large marine bearings’ facility.
The long aft stern tube bearing measured 534 mm (outer diameter) x 460 mm (inner diameter) and was 1,640 mm in length, excluding the 640 mm diameter flange, which was machined separately.
Vesconite Bearings marine sales engineer Wian Venter explains that the flange and the bearing had steps machined into them to allow the flange to have a sliding fit over the bearing.
Water-cooling grooves were also specified, as is typical for stern tube bearings, to help cool the bearing during operation, he adds.
A smaller forward stern tube bearing, with water-cooling grooves, was also manufactured for the client, Venter describes.
It measured 533 mm (outer diameter) x 460 mm (inner diameter) and was 410 mm in length, he says.
The bearings were installed on an oil and chemical tanker, the Celsius Mayfair, in China in December.
“I am highly satisfied with the items supplied, which have been successfully installed onboard our vessel during its third special survey,” says the Celsius Mayfair’s Manager, while discussing the Vesconite Hilube bearings that replaced the rubber Cutless bearings that were in place prior to the refit.
The vessel has been running for over six months without any problems after the installation, he notes.
Vesconite Hilube stern tube bearings typically exhibit no squeal at low speed, no stick-slip, can be easily installed, and provide a long wear life.
The one-piece stern tube bearing was approved by the Japanese classification society, Nippon Kaiji Kyokai, known as ClassNK.