Propeller bearings in marine propulsion support the propeller shaft, ensuring smooth rotation and alignment. They reduce friction and wear between moving parts, enhancing efficiency and longevity. Proper lubrication and maintenance are crucial for optimal performance and preventing failures.

Size: Typically ranges from 50 mm to 1000 mm in diameter, depending on vessel size and propulsion requirements.

Grade: Commonly uses high-grade materials like ASTM A148 or ASTM A487 for cast steel components.

Viscosity: Lubrication oil viscosity usually ranges from ISO VG 68 to ISO VG 150, depending on operating conditions.

Buoyancy: Designed to withstand thrust loads up to several hundred tons, with buoyancy support integrated into stern tube systems.

Material: Bearings often made of white metal (Babbitt), bronze, or composite polymers like Thordon for corrosion resistance.

Load Capacity: Rated for dynamic loads up to 500 kN or more, depending on bearing size and design.

Operating Temperature: Typically -10°C to 80°C, with specialized coatings for extreme conditions.

Corrosion Resistance: Stainless steel (316L) or nickel-aluminum bronze (NAB) components for seawater exposure.

Alignment Tolerance: Precision-machined to within 0.05 mm/m to ensure proper shaft alignment.

Maintenance Interval: Requires lubrication every 6-12 months, with inspections every 2-5 years based on usage.

Yes, Propeller Bearings, Marine Propulsion products typically comply with maritime standards such as ISO, ABS, DNV, and other relevant industry certifications.