Stern Tube Bearing · Shaft Line Equipment
The Orkot TLMM and TXMM are composite stern tube bearings from Trelleborg Sealing Solutions, fitted in the stern tube to support the propeller shaft. They are water-lubricated polymer composite bearings that carry the shaft load and allow rotation with seawater as the lubricating film. DNV approval covers their use as stern tube bearings on seagoing vessels.
What our service work and the manufacturer documentation say about keeping this model running.
Measure bearing wear down or shaft drop at drydock and class surveys and compare with the allowable clearance limits. Check the water supply flow and the sealing arrangement, and inspect for edge wear indicating misalignment.
Plan bearing replacement for drydock, as the bearings are normally machined and fitted ashore or in the yard. Keep spare seal and sealing ring sets and keep records of bearing clearances to plan renewal.
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