Hitec D940TW D-Series Ultra Torque Titanium Gear Digital Servo (High-Voltage)

Hitec D940TW D-Series Ultra Torque Titanium Gear Digital Servo (High-Voltage)
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Price: $129.99
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This is a Hitec D940TW Titanium Gear Servo, designed with industry leading high-resolution and state-of-the-art ultra-response technology. A 32-bit MCU and 12-bit ADC allow for unprecedented programmability and flexibility. 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 3mm hex screw, each D-Series servo delivers monster performance.


  • Programmable PWM Digital Amplifier
  • 32-Bit MCU with 12-Bit ADC Circuitry
  • 4096 Resolution
  • 1M Cycle Long Life Potentiometer
  • Wide Operating Voltage (4.8 ~ 8.4 Volts DC)
  • Dual Ball Bearing Supported Output Shaft
  • 25-Tooth Output Spline
  • Coreless Metal Brush Motors
  • Nylon Reinforced Plastic Upper and Lower Case
  • Diamond Cut Aluminum Heat Sink Center Case
  • Dust Resistant and Splash Proof Case
Programmable Functions:
  • End Point Adjustments
  • Direction
  • Fail Safe
  • Dead Band
  • Speed (Slower)
  • Soft Start Rate
  • Overload Protection
  • Data Save / Load
  • Program Reset


Size Category: Standard
Type: Digital
Torque: 139 oz-in @ 4.8v, 187 oz-in @ 6.0v, 229 oz-in @ 7.4v
Speed: 0.11 @ 4.8v, 0.07 @ 6.0v, 0.06 @ 7.4v
Dimensions (WxLxH): 1.57 x 0.79 x 1.50 in (39.9 x 20.1 x 38.1 mm)
Bushing Or Bearing: Bearing
Bearing: Dual
Gear Type: Metal
Gear Material: Titanium

  • 3 Titanium/ Steel Gears Set
  • Metal/ Karbonite 1st Gear Set
  • Plastic/ Aluminum Case Set
  • Applicable Horns

This product was added to our catalog on October 25, 2019

Verified Owner
Friday, May 14 2021 (3 months ago)
Hitec D940TW D-Series Ultra Torque Titanium Gear Digital Servo (High-Voltage)
I have used the HiTEC D 940 TW in all my large scale airplanes for throttle control. It's super high speed response, resolution and more than adequate torque has worked perfectly. I have 4 33% and 2 40 % airplanes using this servo and combined with its programmability, it has been the perfect choice. I have also found that the Titanium geared HiTEC servos are the most durable combination in high vibration/high cycle applications.
Verified Owner
Monday, Mar 8 2021 (5 months ago)
Hitec D940TW D-Series Ultra Torque Titanium Gear Digital Servo (High-Voltage)
Good night,

I ordered this servo from Amain Hobbies in March 2020 and I did not receive it till April, 2020. Due to the pandemic I was unable to use the servo due to the country being on lockdown. I finally was able to use it weekend gone and while on the track after the 3rd lap, I realise I could not turn the steering to the right. I ran to get the truggy and noticed the gear was stripped.

How can I be compensated for this servo as this is the first time I am using the servo and I have paid $127.00 plus shipping and I must say this is unacceptable and all my end points and alignment with the steering and everything is on point.

I can be reached at 1-868-355-2339.

I look forward to hearing from you.

Scott Mc Lean