Theta Servos Razor-DH1 Brushless Low Profile High Voltage Servo

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Theta Servos Razor-DH1 Brushless Low Profile High Voltage Servo
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Price: $109.99

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The Razor DH1 Theta Servo is a low profile size brushless servo that is capable of handling high voltage of up to 8.4V. The high torque brushless servo delivers incredible power and can be used for RC helicopters, airplanes, cars, and trucks. Featuring NFC technology, the Razor series of servos can tune and optimize performance through an Android device. Settings such as servo centering (servo offset), refresh rate, acceleration, and PID control loop are all available for tuning. 


  • High voltage compatibility
  • Brushless motor
  • Metal gears
  • Precision centering 
  • NFC Wireless tuning via Android devices
  • 25T Output shaft 
  • All black cables
  • Neutral position: 760uS | 1520uS - Selectable

  • Operating Voltage: 5V - 8.4V
  • Torque:
    • 3A:
      • 6V: 360 oz/in (26kg-cm)
      • 7.4V:  388 oz/in (28kg-cm)
      • 8.4V: 416 oz/in (30kg-cm)
    • 5A:
      • 6V: 471 oz/in (34kg-cm)
      • 7.4V:  513 oz/in (37kg-cm)
      • 8.4V:  555 oz/in (40kg-cm)
  • Speed:
    • 3A:
      • 6V: 0.09 sec/60
      • 7.4V:  0.08 sec/60
      • 8.4V:  0.07 sec/60
    • 5A:
      • 6V: 0.081 sec/60
      • 7.4V: 0.072 sec/60
      • 8.4V:  0.063 sec/60
  • Weight: 60g (2.11 Oz)
  • Motor Type: Brushless
  • Spline: 25T

This product was added to our catalog on May 4, 2022

Verified Owner
Monday, Jun 27 2022 (3 months ago)
Theta Servos Razor-DH1 Brushless Low Profile High Voltage Servo
It bragged about being adjustable with an app. Ya! Not so much. Thankfully my radio has servo adjustments. I could not get the app to work for me. Seems like they are still in the process of getting the app up and running. I made some adjustments on my radio to get the servo to work to my needs. Performance is so so. Fast, GLITCHY till I added capacitor. Time will tell.
It’s a fasttech product so I don’t have much faith. I didn’t know that part till I did research of course. Looks cool. But the Dh1 is all black not like the aqua in the pic either. Hope it holds up. Drove mint at the indoor track.