# \#stern-tube

**URL:** https://www.queseas.com/tag/stern-tube/66.md

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## [Gard - Increase in stern tube damages (2023)](https://www.queseas.com/t/gard-increase-in-stern-tube-damages-2023/857)

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**Author:** [@Ernesto](https://www.queseas.com/u/Ernesto)\
**Replies:** 0\
**Last updated:** [October 18, 2023, 8:07pm UTC](https://www.queseas.com/t/gard-increase-in-stern-tube-damages-2023/857 "2023-10-18T20:07:44Z")

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An interesting and up to date statistical study by Gard (marine insurers) on stern tube damages. Stern tube damages often top the list of the most expensive insurance claims, so it is no wonder Gard wanted to study the t…

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## [Stern tube oil lubricating system (with air seals)](https://www.queseas.com/t/stern-tube-oil-lubricating-system-with-air-seals/752)

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**Author:** [@Raj.Raganathan](https://www.queseas.com/u/Raj.Raganathan)\
**Replies:** 0\
**Last updated:** [May 19, 2023, 7:10pm UTC](https://www.queseas.com/t/stern-tube-oil-lubricating-system-with-air-seals/752 "2023-05-19T19:10:58Z")

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Good evening! I would like to share with you a short description of the operation logic of the stern tube lubricating system. I think it is helpful. The stern tube assembly, which includes the forward and aft seals, se…

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## [Failure of the air supply system on a stern tube air seal](https://www.queseas.com/t/failure-of-the-air-supply-system-on-a-stern-tube-air-seal/670)

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**Author:** [@Surcouf\_Renard](https://www.queseas.com/u/Surcouf_Renard)\
**Replies:** 2\
**Last updated:** [May 19, 2023, 7:07pm UTC](https://www.queseas.com/t/failure-of-the-air-supply-system-on-a-stern-tube-air-seal/670 "2023-05-19T19:07:26Z")

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Is the failure of the air supply system on a stern tube air seal, critical for the stern tube system?

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## [High Copper concentration in Stern Tube LO](https://www.queseas.com/t/high-copper-concentration-in-stern-tube-lo/487)

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**Author:** [@KostasXydis](https://www.queseas.com/u/KostasXydis)\
**Replies:** 1\
**Last updated:** [October 18, 2022, 2:20pm UTC](https://www.queseas.com/t/high-copper-concentration-in-stern-tube-lo/487 "2022-10-18T14:20:24Z")

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Good day everybody. Does anybody have past experience with increased Copper concentration (60ppm-80ppm) in Stern Tube LO? What actions were taken in your case?

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## [Stern tube bearing damage due to partial propeller immersion](https://www.queseas.com/t/stern-tube-bearing-damage-due-to-partial-propeller-immersion/383)

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**Author:** [@Surcouf\_Renard](https://www.queseas.com/u/Surcouf_Renard)\
**Replies:** 2\
**Last updated:** [August 18, 2022, 6:26pm UTC](https://www.queseas.com/t/stern-tube-bearing-damage-due-to-partial-propeller-immersion/383 "2022-08-18T18:26:49Z")

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Good evening, We hear that it is highly probable to damage the stern tube bearing when the vessel is sailing with the propeller not fully immersed in the water. Could somebody elaborate further on this?

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## [Stern tube bio oil](https://www.queseas.com/t/stern-tube-bio-oil/139)

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**Author:** [@Philip.Argyropoulos](https://www.queseas.com/u/Philip.Argyropoulos)\
**Replies:** 1\
**Last updated:** [June 25, 2022, 10:50am UTC](https://www.queseas.com/t/stern-tube-bio-oil/139 "2022-06-25T10:50:26Z")

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What are the drawbacks of stern tube biodegradable oil, except its price?