HS-7985MG Servo

The HS-7985MG High Torque Digital Servo has the added benefit of Hitec's new G2 second generation programmable digital circuit. This circuit has twice the resolution of our original circuit while adding programmable overload protection. The technology doesn’t stop at the circuit board, with a high performance coreless motor, dual ball bearing supported output shaft, bushing supported gear shafts and Hitec's Heavy Duty Metal gear train the HS-7985MG was designed to withstand the stress of larger high performance aircraft and on/off road vehicles.

How Far Will This Servo Rotate?

The answer to this question is partially dependant on what you are using to control the servo.
Click for a quick video explanation.

Stock:

With an Average Radio System:
67°
Your average transmitter and receiver will output a relativly narrow PWM signal range.

Radio System + Servo Stretcher:
113°
Adding a Servo Stretcher to your radio system setup will allow you to achieve wide PWM signal ranges.

Wide Signal Controllers:
113°
Controllers such as the Actobotics® Servo Controller, Arduinos, and Raspberry Pi servo hats can usually send a wide signal.

Reprogrammed:

Whether you purchase the reprogrammed option or get a servo programmer and do it yourself, a reprogrammed version of this servo will be able to achieve greater travel than it can in stock form.

With an Average Radio System:
117°
Your average transmitter and receiver will output a relativly narrow PWM signal range.

Radio System + Servo Stretcher:
195°
Adding a Servo Stretcher to your radio system setup will allow you to achieve wide PWM signal ranges.

Wide Signal Controllers:
195°
Controllers such as the Actobotics® Servo Controller, Arduinos, and Raspberry Pi servo hats can usually send a wide signal.

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)

Tech Tips

Specs

Output Shaft Style C24T Spline
Voltage Range 4.8V - 6.0V
No-Load Speed (4.8V) 0.16sec/60°
No-Load Speed (6.0V) 0.13sec/60°
Stall Torque (4.8V) 144 oz-in (10.4 kg.cm)
Stall Torque (6.0V) 172 oz-in (12.4 kg.cm)
Max PWM Signal Range 750-2250μsec
Travel per µs (Stock) .075°/μsec
Travel per µs (Reprogrammed) .130°/μsec
Max Rotation (Stock) 113°
Max Rotation (Reprogrammed) 195°
Pulse Amplitude 3-5V
Operating Temperature -20°C to +60°C
Current Drain - idle (4.8V) 3mA
Current Drain - idle (6.0V) 3mA
Current Drain - no-load (4.8V) 200mA
Current Drain - no-load (6V) 240mA
Current Drain - stall (4.8V) 2A
Current Drain - stall (6V) 3A
Continuous Rotation Modifiable Yes
Direction w/ Increasing PWM Signal Clockwise
Deadband Width 2µs
Motor Type Coreless Carbon Brush
Feedback Style 5KΩ Potentiometer
Output Shaft Support Dual Ball Bearing MR106
Gear Material 3 Metal, 1 Metal Karbonite Gear
Wire Length 7" (178mm)
Weight 2.18oz (62g)
Wire Gauge 22AWG
Servo Size Standard

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