Providing the ultimate combination of torque and speed, the HS-7975HB servo features the Karbonite gear technology that offers four times the strength of nylon with no flex or wear resulting in incredible precision and that “locked in feel”. The HS-7975HB features our G2 second generation programmable digital circuit with twice the resolution of our original circuit and added programmable overload protection. The HS-7975HB is an excellent choice for pattern planes and high performance helicopters up to .90 size. 

Warning: Do not use thread lockers on Karbonite geared servos as it will cause the output shaft to fail.


  • G2 Digital Circuit
  • Coreless Motor
  • Dual Ball Bearing Supported Output Shaft
  • Karbonite Composite Gears

Programmable Features Include:

 - Dead Band Width 
 - Direction of Rotation 
 - Speed of Rotation (slower) 
 - End Points 
 - Neutral Points 
 - Fail Safe On/Off 
 - Fail Safe Point 
 - Resolution* (default is high resolution) 
 - Overload Protection* (default is off)

*These features are only programmable with the HFP-20 field programmer.


Motor Type:Coreless
Bearing Type:Dual Ball Bearing
Speed (4.8V/6.0V):0.13 / 0.10
Torque oz./in. (4.8V/6.0V):119 / 144
Torque kg./cm. (4.8V/6.0V):8.6 / 10.4
Size in Inches:1.57 x 0.78 x 1.45
Size in Millimeters:39.88 x 19.81 x 36.83
Weight ounces:1.87
Weight grams:53.01