User's Manual
Moog Components Group • www.moog.com/components
•  Film position transducer
•  Canard E.M. brake
• Low backlash
•  Robust structural design
•  High efciency steel gearing
•  Position output signal
•  Stroke: ±36.5° Aileron
 43.8° CW Canard / 29.2° CCW Canard
Model 980-10 and 980-20
The Model 980 Rotary Brushless Actuator 
System is an antenna azimuth drive servo 
actuator system consisting of the actuator 
motor/gearhead,  separate  controller  and 
interconnecting cables. The system is used 
for ground vehicle radar applications in full 
and sector scan modes.
• Size: 4.06 x 4.06 (over mounting ange)          
  x 14.00 inches from rear of motor  
  assembly to front of mounting   
  ange  (Model  98000000-10 Actuator)
• Size:11.0 x11.0 mounting base x 7.00 
  inches high (Model 98000000-20 Drive 
  Controller)
• Rated Power Point: 168 in lb @ 183 rpm
• Weight: 17.3 lbs actuator only
• Input Power: 3 Phase 120/208 400 Hz 
• Rare earth brushless DC Hall sensor 
  commutated motor with thermistors
• Encoder rate feedback
• Robust structural design
• Low endplay
• High efciency planetary steel gearing
• Front ange mount
• Stroke: continuous rotation
• Stall point: 1,650 in lbs
• No-load speed: 230 rpm (limited by 
  controller)
• Scan, sector and stare modes
• Bit test outputs
• Separately package drive controller 
  that accepts RS-232 commands
Model 873
The Model 873 Rotary Brushless Actuator  
is used to control 
the  rotational 
function of the 
aircraft’s night 
vision  targeting 
system.
• Size: 1.6 x 3.5 x 5.8 inches
• Power: 150 VDC and ±15 VDC
• Power point: 40 in-lb @ 621 rpm
• Weight: 3.9 lbs
• Peak torque: 135 in-lbs
• ±10 VDC analog command input
• SmCo permanent magnet DC 
brushless motor
• 1 & 16 speed resolver
• Fail safe brake
• Very low backlash
• Robust structural design
• High efciency steel gearing
• No load speed: 660 rpm
Model 874
The  Model  874  Rotary 
Brushless Actuator  is 
used  to  control  the 
derotational  function 
of  the  aircraft’s  night 
vision targeting system.
• Size: 1.25 x 2.35 x 4.0 inches
• Power: 150 VDC and ±15 VDC
•  Power point: 12 in-lb @ 660 rpm
• Weight: 1.4 lbs
• Peak torque: 30 in-lbs
• ±10 VDC analog command input
• SmCo permanent magnet DC 
brushless motor
•  1 speed resolver
•  Tachometer
•  Very low backlash
•  Robust structural design
•  High efciency steel gearing 
•  No load speed: 790 rpm
Model 875
The Model 
875 Rotary 
Brushless Actuator is used to control the 
shroud function of the aircraft’s night vision 
targeting system.
• Size: 2.2 x 2.6 x 6.8 inches
• Power: 150 VDC and ±15 VDC
• Power point: 21 in-lb @ 230 rpm
• Weight: 3.0 lbs
• Peak torque: 46 in-lbs
• ±10 VDC analog command input
• SmCo permanent magnet DC brushless 
motor
• 1 speed resolver
• Tachometer
• Fail-safe brake
• Very low backlash
• Robust structural design
• High efciency steel gearing
• No load speed: 320 rpm
Model 905-30
The Model 905-30 
Rotary Servo
Actuator is used
to position the
control surfaces of a
reconnaissance unmanned
air vehicle and is designed to operate
under extreme environmental conditions.
• Size: 2.3 x 4.9 inch foot print and 5.4 
inches long
• Power: 28 VDC
• Power point: 150 in-lb @ 25 rpm
• Weight: 3.0 lbs
• Peak torque: 300 in-lbs
• ±10 VDC analog command input
• Brushless permanent magnet DC motor
• Electronic position and torque limiting
• Film position transducer
• Position output signal
• Current output signal
• Low backlash
• Robust structural design
• High efciency steel gearing
• Mechanical stops
• Bandwidth to 10 Hz
• No load speed: 35 rpm
• Stroke: ±46°
Model 917
Our military
qualied Model
917 Rotary 
Brushless
Actuator is  an  azimuth drive  servo  for an
airborne  rate  and  position  antenna
Rotary Servo Actuators








