D940TW Servo-Clockwise (stock)-Stock Rotation


The titanium gear D-940TW is part of Hitec’s D-Series dynamo servo line. All Hitec D-Series servos have been designed using their cutting edge, custom engineering. Combining industry leading high-resolution, state-of-the-art ultra-response technology with a 32-bit MCU, and a 12-bit ADC for unprecedented programmability and flexibility. These servos deliver significantly smoother movement. The speedy, powerful line operates on a wide 4.8 ~ 8.4 voltage range, allowing use with any common battery chemistry without the need for adapters or regulators. Featuring Hitec’s industry standard 25-tooth output spline with an M3 pan head with a phillips drive style, each D-Series servo brings monster performance never known before in the market.

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.

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

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

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

Special Features

  • Wide Voltage Range: DC 4.8-8.4V
  • 2 cell Li-Po (6 cell Ni-MH) compatible
  • Programmable digital amplifier with MOSFET drive
  • Gold plated connector
  • Narrow dead band width & high standing torque
  • Applied H25T horn gear
  • 3mm horn screw (‘+’ & HEX socket screw included)
  • 32bit MCU / 12bit ADC
  • Durable titanium alloy metal gears with dual ball bearings
  • Ultra hardness gear shaft with 3 axial metal bushing
  • Heat sink for motor
  • Water & dust resistant (splash proof)

Tech Tips


Output Shaft Style H25T Spline
Voltage Range 4.8V - 8.4V
No-Load Speed (7.4V) 0.07 sec/60°
No-Load Speed (4.8V) 0.11 sec/60°
No-Load Speed (6.0V) 0.08 sec/60°
Stall Torque (4.8V) 138.87 oz-in. (10.0 kg.cm)
Stall Torque (6.0V) 187.48 oz-in. (13.5 kg.cm)
Stall Torque (7.4V) 229.14 oz-in. (16.5 kg.cm)
Max PWM Signal Range 750-2250μsec
Travel per µs (Stock) .080°/μsec
Max Rotation (Stock) 120°
Pulse Amplitude 3-5V
Operating Temperature -20°C to +60°C
Continuous Rotation Modifiable Yes
Direction w/ Increasing PWM Signal Clockwise
Deadband Width 2µs
Motor Type Coreless
Feedback Style 5KΩ Potentiometer
Output Shaft Support Dual Ball Bearings
Gear Material Titanium
Wire Length 11.81" (300mm)
Weight 2.40oz (68g)
Direction Clockwise (stock)
Servo Size Standard

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