Stern Bearing Oil is a specialized marine lubricant designed for stern tube bearings in ships. It provides excellent lubrication, cooling, and corrosion protection for propeller shaft bearings. Its formulation ensures smooth operation and longevity in harsh marine environments.

Stern Bearing Oil, Marine Lubricants:

- Size: Typically available in 20L, 200L drums, or bulk quantities

- Grade: ISO VG 68, 100, 150, 220, 320 (common grades for marine applications)

- Viscosity: Ranges from 68 cSt to 320 cSt at 40°C, depending on application

- Buoyancy: Not typically specified; primary function is lubrication, not buoyancy

- Material: Mineral or synthetic base oils with anti-wear, anti-corrosion, and extreme pressure (EP) additives

- Operating Temperature Range: -10°C to 120°C (varies by formulation)

- Flash Point: Minimum 200°C (to ensure safety in marine environments)

- Density: Approximately 0.88–0.92 g/cm³ at 15°C

- Compatibility: Suitable for bronze, steel, and composite stern bearings

- Water Resistance: High demulsibility to separate from water

- Oxidation Stability: High resistance to degradation in harsh marine conditions

Stern Bearing Oil and Marine Lubricants typically comply with maritime standards such as ISO 6743-4, ISO 15380, and OEM specifications from manufacturers like Wärtsilä, MAN, and Caterpillar. Always check the product datasheet for specific compliance details.