The ship engine crankshaft converts linear piston motion into rotational power. It is a critical component made of high-strength steel to withstand heavy loads. Key engine parts include pistons, connecting rods, and bearings that work together with the crankshaft.

Ship Engine Crankshaft:

- Size: Typically 1-10 meters in length, depending on engine size

- Grade: High-strength alloy steel (e.g., ASTM A668, DIN 1.7225)

- Viscosity: N/A (solid component)

- Buoyancy: N/A (non-floating component)

- Material: Forged steel or nodular cast iron

Engine Parts (General):

- Size: Varies (pistons, bearings, valves, etc.)

- Grade: Steel alloys (e.g., SAE 4140, 4340), cast iron, or aluminum

- Viscosity: Applies to lubricants (e.g., SAE 30, 40, or 15W-40)

- Buoyancy: N/A (most parts are non-floating)

- Material: Steel, aluminum, titanium, or composite materials