Meter-Class Capability  |  Up to 5 m diameter, in-house

The Pain Point

Marine shaft lines are uniquely vulnerable: propeller pitch, hull fouling, and sea state all shift the system’s natural frequency. On direct-drive two-stroke slow-speed engines, a single resonant event can crack a crankshaft or twist a propeller shaft. On four-stroke medium-speed engines with gearboxes, torsional peaks amplify at gear mesh. Dampers must survive salt spray, high humidity, and 24/7 operation — often at meter-class diameter.

Auramaia Solution

Auramaia manufactures large-bore crankshaft dampers up to 5 meters in diameter under one roof — from steel-plate rolling and machining to dynamic balancing and final verification. We offer rubber, silicone-oil, and composite damper technologies, selected per engine type, operating profile, and classification society requirements. Every unit is dynamically balanced to ISO 1940 G6.3 or tighter.

Customer Value

• Shifts critical speeds completely outside the operating range — no barred speed range at any load
• Meter-scale manufacturing eliminates the need for multi-piece assemblies
• In-house dynamic balancing ensures smooth operation from day one
• Corrosion-resistant materials and coatings for long-term marine deployment
• Full torsional calculation report and classification support documentation provided