Stern Tube Bearing · Shaft Line Equipment
Water-lubricated stern tube bearings are essential components in a wide range of marine applications, ensuring reliable operation and environmental compliance. The SXL / COMPAC Series from Thordon Bearings offers robust solutions for shaft diameters ranging from 100 to 1,000 mm. These polymer-based bearings feature elastomeric staves housed in bronze or steel, designed for passive seawater lubrication. With variants like the SXL 150, SXL 300, and COMPAC 500, this series has been a trusted choice since 1985. Common issues such as bearing wear from sand and silt ingestion in shallow waters, uneven wear due to shaft misalignment, stave debonding in extreme conditions, and noise or vibration at low speeds are well-documented. To mitigate these, Thordon Bearings provides replacement staves within 4-8 weeks, along with 24/7 global emergency support. For optimal performance, it is recommended to keep wear measurement tools onboard. During drydock maintenance, bearing clearance should be measured using a poker gauge, and shaft alignment checked. Wear rate monitoring is crucial; deep-sea vessels typically see a life of 15-25 years, while coastal applications may have a shorter lifespan. The SXL / COMPAC Series ensures no oil pollution risk, making it compliant with VGP/EPA regulations.
Every value below comes from the manufacturer datasheet or class-society record on file for this model.
Other models of the same equipment type.
What our service work and the manufacturer documentation say about keeping this model running.
Bearing clearance measurement at drydock (poker gauge). Wear rate monitoring — typical life 15-25 years on deep-sea vessels, shorter on coastal. Shaft alignment check at each drydock. No oil pollution risk — environmentally compliant (VGP/EPA).
Thordon Bearings (Burlington, Ontario, Canada). Replacement staves: 4-8 weeks. Emergency service: Thordon has 24/7 global support. Keep onboard: wear measurement tools.
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