Stern tube bearing seal replacement sleeves are critical components in propulsion systems, designed to protect bearings from water ingress and contamination. These sleeves ensure proper sealing around the propeller shaft, maintaining lubrication and preventing leaks. They are essential for the longevity and efficiency of marine propulsion systems.

Size: Typically ranges from 50mm to 600mm in diameter, depending on vessel requirements.

Grade: High-grade stainless steel (316L) or bronze alloys for corrosion resistance.

Viscosity: Compatible with lubricants of ISO VG 68 to VG 220 viscosity grades.

Buoyancy: Neutral buoyancy to minimize load on the stern tube.

Material: Stainless steel, bronze, or composite materials for durability and wear resistance.

Surface Finish: Precision-machined to 0.8-1.6 µm Ra for optimal sealing.

Operating Temperature: -20°C to +120°C for standard applications.

Pressure Rating: Withstands up to 4 bar static pressure in marine environments.

Hardness: 200-250 HB for metal sleeves, ensuring wear resistance.

Compliance: Meets ISO 9001 and marine classification society standards (ABS, DNV, LR).