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Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | HD-B2S |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
694.50 oz-in
50.01 kg-cm
4.9 N-m
7.4V
625.05 oz-in
45.01 kg-cm
4.4 N-m
6.0V
527.82 oz-in
38.01 kg-cm
3.7 N-m
Top 10%
|
| 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
0.15 sec/60°
400.0 deg/s
66.7 RPM
Average
|
| Physical | |
| Weight | 2.36 oz67.0 gAverage |
| Dimensions |
L 1.61 in W 0.81 in H 1.51 in L 40.9 mm W 20.6 mm H 38.4 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Titanium / Steel |
| Gear Spline/Teeth | 25 T estimate |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 120° |
| Pulse Cycle | 3.003 ms |
| Neutral Position | 1520 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Potentiometer |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -10–60 °C14–140 °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 | Top 10% Stronger than 93% of 1055 Digital Standard servos at 6.0V |
| Speed | Average Faster than 41% of 1038 Digital Standard servos at 6.0V |
| Weight | Average Lighter than 40% of 1872 Digital Standard servos |
Performance Analysis
| Shaft Power | 6.51–12.84 W |
| Power Density | 6.521 W/in³ More power-dense than 88% of 1762 Digital Standard servos |
| Torque Density | 7.8779 oz-in/g Stronger than 97% of 1048 Digital Standard servos |
| Torque-to-Volume Ratio | 268.04 oz-in/in³ Denser torque than 92% of 1053 Digital Standard servos |
| Speed-to-Weight | 0.09950 (1/sec·g) Faster than 36% of 1031 Digital Standard servos |
| Speed-Torque Trade-off | 79.17 Better balanced than 92% of 1029 Digital Standard servos |
| Torque Gain per Volt | 13.16%/V More voltage-responsive (torque) than 34% of 868 Digital Standard servos |
| Speed Gain per Volt | 20.83%/V More voltage-responsive (speed) than 81% of 868 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 54% of 1552 Digital Standard servos |
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