D840WP Servo

The steel gear D-840WP is part of Hitec's D-Series dynamo servo line. All Hitec D-Series servos have been designed using Hitec's brand new, cutting edge, custom engineering. Combining industry leading high-resolution, state-of-the-art ultra-response technology with a 32-bit MCU and 12-bit ADC for unprecedented programmability and flexibility, these servos deliver significantly smoother movement. The speedy, powerful line operates on a wide 4.8 ~ 8.4V input range, allowing use with any common battery chemistry without the need for adapters or regulators. Featuring Hitec’s 15 tooth HD (D15T) output spline with M3 hex screw, 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.

Stock:

With an Average Radio System:
72°
Your average transmitter and receiver will output a relativly narrow PWM signal range.

Radio System + Servo Stretcher:
120°
Adding a Servo Stretcher to your radio system setup will allow you to achieve wide PWM signal ranges.

Wide Signal Controllers:
120°
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:
118°
Your average transmitter and receiver will output a relativly narrow PWM signal range.

Radio System + Servo Stretcher:
199°
Adding a Servo Stretcher to your radio system setup will allow you to achieve wide PWM signal ranges.

Wide Signal Controllers:
199°
Controllers such as the Actobotics® Servo Controller, Arduinos, and Raspberry Pi servo hats can usually send a wide signal.

Features

  • Wide Voltage, Multipurpose Digital Servo
  • Programmable High Response Digital Amplifier with Mosfet Drive
  • Durable Steel Gears with Dual Ball Bearing
  • Water and Dust Resistant (IP67)
  • Heat Sink for Motor

*Programmable features require servo programmer, sold separately (DPC-11).

Tech Tips

Specs

Output Shaft Style D15T Spline
Voltage Range 4.8V - 8.4V
No-Load Speed (7.4V) 0.11 sec/60°
No-Load Speed (4.8V) 0.17 sec/60°
No-Load Speed (6.0V) 0.14 sec/60°
Stall Torque (4.8V) 264 oz-in. (19 kg.cm)
Stall Torque (6.0V) 333 oz-in (24 kg.cm)
Stall Torque (7.4V) 417 oz-in (30 kg.cm)
Motor Type Coreless
Feedback Style 5KΩ Potentiometer
Output Shaft Support Dual Ball Bearings
Gear Material Steel
Weight 227g (8 oz)
IP Rating IP67
Servo Size Large
Max PWM Signal Range 850-2350µsec
Travel per µs (Stock) 0.080°/μsec
Travel per µs (Reprogrammed) 0.132°/μsec
Max Rotation (Stock) 120°
Max Rotation (Reprogrammed) 199°

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