Sleipner SPS55B Actuator kit for Vector Fins™ VF650/VF800

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Boat length
15 - 20 m


For stabilizer fins VF650 and VF800. The SPS55 actuators for Vector fins™ are incredibly compact and silent, designed to fit in small available spaces in modern boats below 20 meters (70 feet).

The actuators are produced to be reliable and hassle-free, ensuring quiet operation that satisfies an owner-operated vessel's needs.

The most compact fin stabilizer actuator ever

Technical design benefits

  • The squared base plate provides a large load distribution area to the hull while installing in tight spaces between stringers and bulkheads.
  • Dual, balanced cylinders provide symmetrical load and force.
  • The actuator can be installed in any direction in the boat; the fin angle is independent of the actuator's direction.
  • No moving hoses at all secures leakages and potential wear and simplifies the installation process.
  • Oversized bearings for lifetime operation with only a minimal level of maintenance.
  • Rack and pinion drive connection for quiet, reliable, long-life operation, with easy service when needed after thousands of operational hours.
  • The Vector fins are quickly and easily installed and removed from the outside for best convenience, such as transport or other haul-out situations.
  • Defined shaft-shear point in case of the fins accidentally hitting something.
  • All wet parts in stainless steel.

Size comparison

Size from side view (left) and top view (right) compared to other brand actuators for similar fin size:


Designed to fit in small and challenging installation areas, the Vector Fins™ unique cone shaft design allows you to utilize the space onboard to install the actuators in any direction and insert the fins into the position you require.
S-Link™ is a CAN-based control system used for communication between Sleipner products installed on a vessel.
  • Compact and waterproof plugs
  • Keyed and color-coded connectors to ensure correct and easy installation
  • Different cable lengths, extenders and T-connectors makes the system scalable and flexible to install
Powered by hydraulic pressure.
Operating PowerHydraulic
Ideal Vessel ClassMotor boat, Commercial vessel
Ideal Vessel Size< 20m / < 70ft
(H) Height149.5mm / 4.65in
(L) Length510mm / 4.33in
(W) Width430mm / 0.16in
(HT) Hull Thickness49mm / 4.33in

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