Fin actuator meeting extreme requirements for performance, weight and miniaturisation

Fin actuator

This miniature fin actuator manufactured by MPS Microsystems was designed based on customer specifications. Designed to guide a very small object and disposing of an extremely limited space, it meets strict requirements in terms of performance, weight - less than 100 g - and dimensions. To reduce the length of this actuator, MPS Microsystems used part of the screw length as the motor axis. This screw is equipped with a very compact 4-point contact bearing that simultaneously absorbs axial and radial loads. The angular play on the aileron axis is less than 0.1° rms.

This actuator meets the storage and vibration requirements of military equipment.



    Weight: < 100 g
    Angular backlash on the fin axis: < 0.1° rms
    Motor drive: 1 Faulhaber brushless motor, 20 mm diameter, type BX4, glueless
    1 ball screw: diameter 4 mm with axial play < 5 µm
  • 1 oil-free 4 points of contact bearing with ceramic balls


  • Application catalogue
  • Product catalogue

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