Hitec D955TW Ultra Torque Titanium Gear Digital Servo (High Voltage)

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Hitec D955TW Ultra Torque Titanium Gear Digital Servo (High Voltage)
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Price: $104.99

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This is the Hitec D955TW Monster Torque Titanium Gear Digital Servo. The power of Hitec’s D-Series servos continues with the introduction of the next Premium Class trio: the D930SW, D954SW and D955TW. As with Hitec's entire “D” line, these technologically-advanced servos are powered by a 32-bit MCU (Microcontroller Unit) and 12-bit ADC (Analog to Digital Converter) industrial science and possess Smart Sense engineering with rapid, high resolution response. This servo features unprecedented programmability and wide-voltage capabilities to deliver the most progressive, leading-edge performance for all radio control needs. The reliably-strong titanium-geared D955TW replaces the well-known HS-7955TH. Advancing servo technology and providing superior engineering has always been Hitec’s mission and that continues today as they expand their outstanding D-Series product line.


  • 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
Operating Voltage Range (Volts DC): 4.8V ~ 7.4V
Speed (Second @ 60°): 0.19 ~ 0.12
Maximum Torque Range oz. / in.: 251 ~ 404
Maximum Torque Range kg. / cm.: 18.0 ~ 29.0
Current Draw at Idle: 30 mA 
No Load Operating Current Draw: 500 mA
Stall Current Draw: 5,200 mA
Dead Band Width: 1 µs 
Dimensions (Inches): 1.57 x 0.78 x 1.46 
Dimensions (Metric): 40.0 x 20.0 x 37.0 
Weight (Ounces): 2.33
Weight (Gram): 66.0 
Circuit Type: 32bit Programable Digital 
Motor Type: Coreless Metal Brush 
Gear Material: MK 1st Gear & 3 Titanium Gears
Bearing Type: Dual Ball Bearing 
Output Shaft (type / Ømm): H25T
Case Material: Plastic / Aluminum
Dust / Water Resistance: Splash Proof
Connector Gauge (AWG) / Strand Count: 20 / 80

  • D955TW Monster Torque Titanium Gear Digital Servo
  • 3 Titanium Gears Set
  • Metal / Karbonite 1st Gear Set
  • Plastic/Aluminum Alloy Case Set/Link
  • Applicable Horns & Screws
Limited Warranty:
Hitec Servo Warranty: Each Hitec servo is backed by a limited two-year warranty from the date of purchase. Hitec RCD USA, INC. shall REPAIR OR REPLACE, at Hitec RCD, INC., defective equipment covered by this warranty, otherwise the purchaser and/or consumer is responsible for any charges for the repair or replacement of the product.

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

Verified Owner
Monday, Feb 15 2021 (about 2 years ago)
Hitec D955TW Ultra Torque Titanium Gear Digital Servo (High Voltage)
A fantastic addition to my SMT10. A BEC is a must if you want to get the full potential out of this servo. Rest assured it is up to the task once you do.
Michael Taylor
Verified Owner
Thursday, Apr 27 2023 (7 months ago)
Hitec D955TW Ultra Torque Titanium Gear Digital Servo (High Voltage)
Good servo but us not compatible with new hitek recievers. Again hobby was able to refund D955TW servos. Info I have about this servo reciever combo was from hirek. There working on a patch to fix this centering problem. Other non hiteck receivers work According to hiteck.