Stern Tube Bearing · Shaft Line Equipment
Ensuring reliable operation and minimizing downtime are critical considerations in maritime applications. The SKF Marine Simplex Compact Seal offers a robust solution for sealing seawater/stern tube oil interfaces. Available in four size ranges—Simplex Compact S, M, L, and XL—this stern tube seal accommodates shaft diameters from 100 to 1,200 mm. Designed as a passive, multi-lip rubber seal with a chrome liner and spring-loaded mechanism, it has been a trusted choice since its introduction in 1950. While the Simplex Compact Seal is known for its durability, potential common failures include lip seal wear from shaft liner scoring, chrome liner pitting due to seawater corrosion, seal housing bolt corrosion/seizure, and oil loss from a worn aft seal. SKF Marine offers seal kits and chrome liners, with lead times ranging from 3 to 10 weeks. Service recommendations include daily drain inspections, seal replacement during drydock periods, chrome liner reconditioning or replacement if scored, and oil analysis every three months.
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What our service work and the manufacturer documentation say about keeping this model running.
Same as Wärtsilä seals. Drain inspection daily. Seal replacement at drydock. Chrome liner reconditioning or replacement if scored. Oil analysis every 3 months.
SKF Marine (Gothenburg, Sweden). Simplex seal kits: 3-6 weeks. Chrome liners: 6-10 weeks.
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