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Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | HD-A-40CHV |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
555.60 oz-in
40.01 kg-cm
3.9 N-m
7.4V
486.15 oz-in
35.01 kg-cm
3.4 N-m
6.0V
347.25 oz-in
25.00 kg-cm
2.5 N-m
Above Average
|
| Speed |
8.4V
0.10 sec/60°
600.0 deg/s
100.0 RPM
7.4V
0.12 sec/60°
500.0 deg/s
83.3 RPM
6.0V
0.14 sec/60°
428.6 deg/s
71.4 RPM
Average
|
| Physical | |
| Weight | 2.82 oz80.0 gBelow Average |
| Dimensions |
L 1.60 in W 0.81 in H 1.52 in L 40.6 mm W 20.6 mm H 38.6 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Metal / Steel |
| Gear Spline/Teeth | 25 T estimate |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Neutral Position | 1520 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Potentiometer |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -20–60 °C-4–140 °F |
| Water Rating | Splashproof |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Origin | |
| Country of Origin | Hong Kong |
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 | Above Average Stronger than 78% of 1060 Digital Standard servos at 6.0V |
| Speed | Average Faster than 50% of 1045 Digital Standard servos at 6.0V |
| Weight | Below Average Lighter than 11% of 1880 Digital Standard servos |
Performance Analysis
| Shaft Power | 4.59–10.27 W |
| Power Density | 5.215 W/in³ More power-dense than 80% of 1768 Digital Standard servos |
| Torque Density | 4.3406 oz-in/g Stronger than 68% of 1053 Digital Standard servos |
| Torque-to-Volume Ratio | 176.28 oz-in/in³ Denser torque than 76% of 1058 Digital Standard servos |
| Speed-to-Weight | 0.08929 (1/sec·g) Faster than 24% of 1038 Digital Standard servos |
| Speed-Torque Trade-off | 48.61 Better balanced than 74% of 1034 Digital Standard servos |
| Torque Gain per Volt | 25.00%/V More voltage-responsive (torque) than 92% of 873 Digital Standard servos |
| Speed Gain per Volt | 16.66%/V More voltage-responsive (speed) than 56% of 874 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 54% of 1560 Digital Standard servos |
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Reviews (1)
Includes 1 review aggregated from around the web.
There are very few reviews for this servo on the web. The one buyer who reviewed it gave five stars and called it a good, powerful servo with no play.
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