Propeller shaft couplings in marine propulsion connect the engine to the propeller shaft, ensuring efficient power transmission. They accommodate misalignment and reduce vibrations for smooth operation. Common types include rigid, flexible, and hydraulic couplings, each suited for specific marine applications.

Size: Typically ranges from 50 mm to 500 mm in diameter, depending on vessel size and propulsion requirements.

Grade: Commonly complies with marine standards such as ISO 8845, DIN 862, or ABS/Lloyd's Register certifications.

Viscosity: Lubricants used often have an ISO VG 68 to VG 220 viscosity range for optimal performance.

Buoyancy: Neutral buoyancy is maintained to avoid additional load on the propulsion system.

Material: High-strength steel (e.g., AISI 4140), stainless steel (e.g., 316L), or composite materials for corrosion resistance.

Torque Capacity: Ranges from 1,000 Nm to 50,000 Nm, depending on coupling size and application.

Operating Temperature: -20°C to +120°C, with specialized variants for extreme conditions.

Alignment Tolerance: Angular misalignment up to 3°, parallel misalignment up to 5 mm.

Damping Properties: Rubber or polyurethane elements often integrated to reduce vibrations.

Corrosion Resistance: Coatings like zinc-nickel or galvanization for saltwater environments.

Yes, Propeller Shaft Couplings for Marine Propulsion typically comply with maritime standards such as ISO 8845, ISO 8846, and ABS (American Bureau of Shipping) standards. Always verify specific compliance with the manufacturer.