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Technical Specifications
Last Updated: 2026-10-21| Identity | |
| Brand |  |
| Product Number | HD-9150MG |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V
222.20 oz-in
16.00 kg-cm
1.6 N-m
4.8V
180.50 oz-in
13.00 kg-cm
1.3 N-m
Average
|
| Speed |
6.0V
0.18 sec/60°
333.3 deg/s
55.6 RPM
4.8V
0.20 sec/60°
300.0 deg/s
50.0 RPM
Below Average
|
| Running Current |
6.0V
0.350 A
350 mA
4.8V
0.300 A
300 mA
Average
|
| Stall Current | 2.6–3.2 A2600–3200 mAAverage |
| Physical | |
| Weight | 2.15 oz61.0 gAverage |
| Dimensions |
L 1.60 in W 0.79 in H 1.66 in L 40.6 mm W 20.1 mm H 42.2 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Metal |
| Gear Spline/Teeth | 25 T |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 120° |
| Mechanical Limit | 180° |
| Pulse Cycle | 20 ms |
| Pulse Width | 800-2200 µs |
| Refresh Rate | 250 Hz |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Temperature | -10–50 °C14–122 °F |
| Idle Current | 0.005 A5 mA |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 300 mm11.81 in |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Class Comparison
| Torque | Average Stronger than 40% of 1060 Digital Standard servos at 4.8V |
| Speed | Below Average Faster than 12% of 1045 Digital Standard servos at 4.8V |
| Weight | Average Lighter than 58% of 1880 Digital Standard servos |
| Running Current | Average Lower draw than 38% of 226 Digital Standard servos at 4.8V |
| Stall Current | Average Lower draw than 52% of 570 Digital Standard servos |
Performance Analysis
| Shaft Power | 1.67–2.28 W |
| Power Density | 1.088 W/in³ More power-dense than 20% of 1768 Digital Standard servos |
| Torque Density | 2.9590 oz-in/g Stronger than 42% of 1053 Digital Standard servos |
| Torque-to-Volume Ratio | 86.02 oz-in/in³ Denser torque than 35% of 1058 Digital Standard servos |
| Speed-to-Weight | 0.08197 (1/sec·g) Faster than 16% of 1038 Digital Standard servos |
| Speed-Torque Trade-off | 36.10 Better balanced than 59% of 1034 Digital Standard servos |
| Current-per-Torque Ratio | 0.0177 A/oz-in More efficient than 36% of 331 Digital Standard servos |
| Idle-to-Running Current Ratio | 0.017 Lower idle draw than 87% of 167 Digital Standard servos |
| No-Load vs Stall Current Spread | 10.67 Narrower current spread than 74% of 179 Digital Standard servos |
| Torque Gain per Volt | 19.25%/V More voltage-responsive (torque) than 75% of 873 Digital Standard servos |
| Speed Gain per Volt | 9.25%/V More voltage-responsive (speed) than 12% of 874 Digital Standard servos |
| Voltage Range Width | 1.2 V Wider voltage range than 20% of 1560 Digital Standard servos |
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Reviews (4)
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Dalton
July 11, 2013Application(s): Elevator and Ailerons on a 50cc Yak 54
Comments: Powerful servo with a good response time for a fantastic price. I've had these on the elevators and ailerons of my 50cc Aeroworks Yak flying imac and light 3D for about a year now with ZERO problems. They have performed fantastically- I'm about to buy more for a 50cc Extra.
Conrad
April 16, 2013Application(s): 1/8th Buggy Steering
Comments: Use it with JR 40Mhz transmitter. Servo jittered. Changed the transmitter from PPM to PCM. Jitters gone, centers 100%. No problems and using for 3 years now.
Mike
July 9, 2012Application(s): Pattern 2 mater aileron and rudder
Comments: Excellent choice. I love what you get for the price.
schu
June 15, 2010Application(s): 30cc Gas airplane.
Comments: These servos are pretty strong and center pretty well, but they have one major flaw. They twitch and extend to one side when they are powered on without a signal. The new spektrum RX gear doesn't send a signal to the servo until they find the TX so with plugged into my newer AR6200 they all twitch.
On my older firmware AR6200, they don't twitch because the RX sends a centering signal to the servos until it finds the TX.