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Technical Specifications
Last Updated: 2026-10-10
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
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
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
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 |
| 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 |
| 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 1043 Digital Standard servos at 6.0V |
| Speed | Average Faster than 39% of 1041 Digital Standard servos at 6.0V |
| Weight | Average Lighter than 39% of 1902 Digital Standard servos |
Performance Analysis
| Shaft Power | 6.51–12.84 W |
| Power Density | 6.521 W/in³ More power-dense than 88% of 1759 Digital Standard servos |
| Torque Density | 7.8779 oz-in/g Stronger than 96% of 1036 Digital Standard servos |
| Torque-to-Volume Ratio | 268.04 oz-in/in³ Denser torque than 91% of 1042 Digital Standard servos |
| Speed-to-Weight | 0.09950 (1/sec·g) Faster than 34% of 1033 Digital Standard servos |
| Speed-Torque Trade-off | 79.17 Better balanced than 91% of 1031 Digital Standard servos |
| Torque Gain per Volt | 13.16%/V More voltage-responsive (torque) than 34% of 850 Digital Standard servos |
| Speed Gain per Volt | 20.83%/V More voltage-responsive (speed) than 81% of 871 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 54% of 1539 Digital Standard servos |
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