CMC Marine hydraulic fin actuators, named Stabilis Mechanica, are simple, long-lasting and flexible: three key traits that allow for easy installation and maintenance.
Thanks to the choice of very high quality material it is possible to guarantee the maximum level of resistance and reliability. All parts that could be in direct contact with sea water are made of stainless steel. The parts not in stainless steel have undergone a special surface treatment against sea water corrosion.
Stabilis Mechanica
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The range of the Stabilis Mechanica models cover a wide range of yachts, starting from 24 metres and all available with at anchor stabilization system. Key Features Good efficiency Proven reliability Wide application range High flexibility
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| Standard Fin Size: | 0,80 m2, 1,00 m2, 1,20 m2 |
| Fin Attachment: |
Precision machined oversized self-locking taper. |
| Main Shaft: |
85 mm diameter duplex stainless steel. |
| Maximum Working Pressure: | 160 bar |
| Cylinder Bore Diameter: | 56 mm |
| Rod Diameter: | 28 mm |
| Fin Actuator Housing Material: | High strength cast iron. |
| Upper and Lower Bearing: | Heavy-duty tapered roller bearings. |
| Sealing Feature: | Two double-lip seals for seawater protection. Easily accessible in a 316 stainless steel cover. Double-lip seal, spring-loaded for grease retention. |
| Lubrication: |
Pre-packed with water-resistant grease for lifetime maintenance-free service. |
| Hydraulic Cylinder: | Bosch Rexroth cylinders for CMC Marine stabilizer applications. Double acting. Steel body construction with high strength tie rods for heavy-duty service. |
| Cylinder Mounting: | Head Trunnion mount allows most compact fin actuator design. Trunnion freely pivots in dual high capacity roller bearing assembly. |
| Rod End Pins: | Through-hardened, ground and passivated high resistance steel. |
| Tiller Arm: | High strength alloy steel, tenifer plated for corrosion resistance. |
| Shaft-Tiller Arm Connection: | Oversized clamp-type for maximum torque capability. |
| Fit & Finishing: | Painted RAL 9016 and polished. |
| Standard Fin Size: | 1,20 m2, 1,40 m2. |
| Fin Attachment: | Precision machined oversized self-locking taper. |
| Main Shaft: | 95 mm diameter duplex stainless steel. |
| Maximum Working Pressure: | 160 bar |
| Cylinder Bore Diameter: | 56 mm |
| Rod Diameter: |
28 mm |
| Fin Actuator Housing Material: | High strength cast iron. |
| Upper and Lower Bearing: | Heavy-duty tapered roller bearings. |
| Sealing Feature: | Two double-lip seals for seawater protection. Easily accessible in a 316 stainless steel cover. Double-lip seal, spring-loaded for grease retention. |
| Lubrication: | Pre-packed with water-resistant grease for lifetime maintenance-free service. |
| Hydraulic Cylinder: | Bosch Rexroth cylinders for CMC Marine stabilizer applications. Double acting. Steel body construction with high strength tie rods for heavy-duty service. |
| Cylinder Mounting: |
Head Trunnion mount allows most compact fin actuator design. Trunnion freely pivots in dual high capacity roller bearing assembly. |
| Rod End Pins: | Through-hardened, ground and passivated high resistance steel. |
| Tiller Arm: | High strength alloy steel, tenifer plated for corrosion resistance. |
| Shaft-Tiller Arm Connection: |
Splined coupling type for maximum torque capability. |
| Fit & Finishing: | Painted RAL 9016 and polished. |
| Standard Fin Size: | 1,60 m2, 1,80 m2, 2,00 m2, 2,40 m2 |
| Fin Attachment: | Precision machined oversized self-locking taper. |
| Main Shaft: |
120 mm diameter duplex stainless steel. |
| Maximum Working Pressure: | 160 bar |
| Cylinder Bore Diameter: | 63 mm |
| Rod Diameter: | 28 mm |
| Fin Actuator Housing Material: | High strength cast iron. |
| Upper and Lower Bearing: | Heavy-duty tapered roller bearings. |
| Sealing Feature: | Two double-lip seals for seawater protection. Easily accessible in a 316 stainless steel cover. Double-lip seal, spring-loaded for grease retention. |
| Lubrication: | Pre-packed with water-resistant grease for lifetime maintenance-free service. |
| Hydraulic Cylinder: | Bosch Rexroth cylinders for CMC Marine stabilizer applications. Double acting. Steel body construction with high strength tie rods for heavy-duty service. |
| Cylinder Mounting: | Head Trunnion mount allows most compact fin actuator design. Trunnion freely pivots in dual high capacity roller bearing assembly. |
| Rod End Pins: | Through-hardened, ground and passivated high resistance steel. |
| Tiller Arm: | High strength alloy steel, tenifer plated for corrosion resistance. |
| Shaft-Tiller Arm Connection: | Splined coupling type for maximum torque capability. |
| Fit & Finishing: | Painted RAL 9016 and polished. |
| Standard Fin Size: | 2,40 m2, 2,60 m2, 2,80 m2, 3,00 m2, 3,50 m2 |
| Fin Attachment: | Precision machined oversized hydraulic taper. |
| Main Shaft: | 150 mm diameter duplex stainless steel. |
| Maximum Working Pressure: | 160 bar |
| Cylinder Bore Diameter: | 80 mm |
| Rod Diameter: | 45 mm |
| Fin Actuator Housing Material: | High strength cast iron. |
| Upper and Lower Bearing: | Heavy-duty tapered roller bearings. |
| Sealing Feature: | Two double-lip seals for seawater protection. Easily accessible in a 316 stainless steel cover. Double-lip seal, spring-loaded for grease retention. |
| Lubrication: | Pre-packed with water-resistant grease for lifetime maintenance-free service. |
| Hydraulic Cylinder: | Bosch Rexroth cylinders for CMC Marine stabilizer applications. Double acting. Steel body construction with high strength tie rods for heavy-duty service. |
| Cylinder Mounting: | Head Trunnion mount allows most compact fin actuator design. Trunnion freely pivots in dual high capacity roller bearing assembly. |
| Rod End Pins: | Through-hardened, ground and passivated high resistance steel. |
| Tiller Arm: | High strength alloy steel, tenifer plated for corrosion resistance. |
| Shaft-Tiller Arm Connection: | Splined coupling type for maximum torque capability. |
| Fit & Finishing: | Painted RAL 9016 and polished. |
| Fins are available for all type of vessels, fin size range starting from 0.60 sqm. The CMC marine fins blades are made from reinforced fiberglass with internal stainless steel structure. The fin geometry and wings profiles offer excellent results in terms of lift coefficient with reduced drag resistance at high speed. The special winglet geometry assures good performances, not only for the fin wake, but also while working at anchor mode. Special CMC Marine fin’s design studies have been afterwards and successfully confirmed by extensive CFD (Computational Fluid Dynamics) analyses as well as full scale records. |
Cfd analyses, flow distribution on a fin profile at 12 knots 10° angle of attack.
Fin wake distribution merging the ship wake at 12 knots forward speed.
Flow speed distribution due to fin swinging on anchor mode.
The CMC Marine fins size starts from 0,60 sqm
The CMC Marine fins size starts from 0,60 sqm
