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HS-M7990TH Servo

  • HS-M7990TH in box
  • HS-M7990TH side view
  • HS-M7990TH included hardware
  • HS-M7990TH top view
  • HS-M7990TH shown (left) with a standard size servo for scale
  • HS-M7990TH shown (right) with a standard size servo for scale
  • HS-M7990TH back view
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This product has been discontinued.  Hitec's most technologically advanced servo, the "Monster Torque" HS-M7990TH features an ultra precise high resolution magnetic encoder instead of a conventional mechanical potentiometer. Designed to operate on a two cell LiPo Pack the HS-M7990TH features Hitec's newest high resolution "G2.5" 12 bit generation programmable digital circuit and their practically indestructible Titanium gears. Other features of the HS-M7990TH include a 7.4V optimized coreless motor, integrated heat sink case, and a top case with two hardened steel gear pins supported by brass axialbushings.


Programable Features:
- Dead Band Width
- Direction of Rotation
- Speed of Rotation (slower)
- End Points
- Neutral Points
- Fail Safe On/Off
- Fail Safe Points
- Resolution (default is set at high)
- Overload Protection (default is off)

Dimensions 1.72" x 0.88"x 1.57" (43.8 x 22.4 x 40mm)
Product Weight 2.76oz (78.2g)
Output Shaft Style 24 tooth (C1) spline
Voltage Range 6.0V - 7.4V
No-Load Speed (6.0V) 0.21 sec/60°
No-Load Speed (7.4V) 0.17 sec/60°
Stall Torque (6.0V) 500oz/in. (
Stall Torque (7.4V) 611oz/in. (
Max PWM Signal Range (Standard) 750-2250μsec
Travel per µs (out of box) .082°/μsec
Travel per µs (reprogrammed high res) .133°/μsec
Max Travel (out of box) 123.5°
Max Travel (reprogrammed high res) 199°
Pulse Amplitude 3-5V
Operating Temperature -20°C to +60°C
Continuous Rotation Modifiable No
Direction w/ Increasing PWM Signal Clockwise
Deadband Width 1µs
Motor Type Coreless Carbon Brush
Potentiometer Drive Magnetic Encoder
Output Shaft Support Dual Ball Bearings MR106
Gear Type Straight Cut Spur
Gear Material Titanium
Wire Length 11.81" (300mm)
Wire Gauge 20AWG

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