The steel gear D-845WP is part of Hitec's D-Series dynamo servo line. All Hitec D-Series servos have been designed using our 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 ~ 8.4 voltage range, allowing use with any common battery chemistry without the need for adapters or regulators. Featuring a 15 tooth HD (D15T) output spline with M3 hex screw, each D-Series servo brings monster performance never known before in the market.
The answer to this question is partially dependent on what you are using to control the servo.
Click for a quick video explanation.
With an Average Radio System:
90°
Your average transmitter and receiver will output a relatively narrow PWM signal range.
Radio System + Travel Tuner:
146°
Adding a Servo Travel Tuner to your radio system setup will allow you to achieve wide PWM signal ranges.
Wide Signal Controllers:
146°
Controllers such as the Servo Commander, Arduinos, and Raspberry Pi servo hats can usually send a wide signal.
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:
145°
Your average transmitter and receiver will output a relatively narrow PWM signal range.
Radio System + Travel Tuner:
202°
Adding a Servo Travel Tuner to your radio system setup will allow you to achieve wide PWM signal ranges.
Wide Signal Controllers:
202°
Controllers such as the Servo Commander, Arduinos, and Raspberry Pi servo hats can usually send a wide signal.
*Programmable features require servo programmer, sold separately (DPC-11).
| Output Shaft Style | D15T Spline |
|---|---|
| Voltage Range | 4.8V - 8.4V |
| No-Load Speed (7.4V) | 0.17 sec/60° |
| No-Load Speed (4.8V) | 0.26 sec/60° |
| No-Load Speed (6.0V) | 0.21 sec/60° |
| Stall Torque (4.8V) | 451 oz-in. (32.5 kg.cm) |
| Stall Torque (6.0V) | 562 oz-in. (40.5 kg.cm) |
| Stall Torque (7.4V) | 694 oz-in. (50 kg.cm) |
| Max PWM Signal Range | 870-2320 μsec |
| Travel per µs (Stock) | 0.101° |
| Travel per µs (reprogrammed high res) | 0.162° |
| Max Rotation (Stock) | 146.45° |
| Pulse Amplitude | 3-5V |
| Motor Type | Coreless |
| Feedback Style | 5KΩ Potentiometer |
| Output Shaft Support | Dual Ball Bearing |
| Gear Material | Steel |
| Weight | 8 oz (227g) |
| IP Rating | IP67 |
| Servo Size | Large |