Model 290 Linear Servo Actuator

Model 290 Linear Actuator

The Model 290 is one of the highest performance linear servo actuators available on the market. We offer this actuator with a digital communications interface. It provides 1,500 lbf at 0.26 inches / second for up to 7.75 inch strokes. It has a homing sequence that determines end of travel on startup, thus, ensuring proper positioning along its stroke. These features allow our customer flexibility to have a drop-in servo actuator for their system.

Details, Features, Product Specifications


  • Size: 3.88 x 4.75 x 14.75 inches long
  • Power: 28 VDC
  • Rated power point: 1500 lb @ 0.26 in/sec
  • Weight: 8.1 lbs
  • Two NFeB Permanent Magnet DC brush motors
  • Two failsafe electromagnetic brakes
  • Robust structural design
  • Low endplay
  • High efficiency steel gearing
  • Trunnion mount for fixed end and traveling nut endfitting
  • Ball screw/nut power screw assembly
  • Stroke: 7.25 inches electrical stroke
  • No-load speed: 0.87 in/sec


  • Unmanned air vehicles — tactical, medium altitude, long endurance (MALE), and high altitude long endurance (HALE) vehicles
    - Flight control surface actuation
  • Optionally piloted air vehicles (OPV)
  • Utility actuation — throttle control, doors, spoilers
  • Electric aircraft, eVTOL, eSTOL, air taxis and urban air mobility vehicles — propeller pitch control, tilting mechanism, flight control, landing gear


Operating Voltage 18 to 32 VDC
Weight 6.0 lb nom
Motor Type 24 VDC permanent magnet brush-type
Brake Type 24 VDC permanent magnet static
Output Shaft Ball screw 0.2 inches / turn
Free Play 0.012 inches (0.3 mm) with 50 lbf
Mechanical Stroke 8.0 inches
Electrical Stroke 7.75 inches
No Load Current 800 mA
No Load Current with Brake 1.1 A
No Load Speed @ 28 VDC 0.6 inches / sec
Rated Current 5.75 A
Rated Torque and Speed 1,500 lbf (6,670 N) @ 0.26 inches / sec with a 10% duty cycle
Maximum Static Load 2,500 lbf (11,120 N)
Electrical Command Interface Isolated half duplex RS-4852