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Technical Specifications
Last Updated: 2026-10-23| Identity | |
| Brand |  |
| Product Number | BMS-A10H |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
44.45 oz-in
3.20 kg-cm
0.3 N-m
7.4V
40.28 oz-in
2.90 kg-cm
0.3 N-m
6.0V
33.34 oz-in
2.40 kg-cm
0.2 N-m
3.7V
22.22 oz-in
1.60 kg-cm
0.2 N-m
Below Average
|
| Speed |
8.4V
0.07 sec/60°
857.1 deg/s
142.9 RPM
7.4V
0.08 sec/60°
750.0 deg/s
125.0 RPM
6.0V
0.10 sec/60°
600.0 deg/s
100.0 RPM
3.7V
0.15 sec/60°
400.0 deg/s
66.7 RPM
Below Average
|
| Physical | |
| Weight | 0.26 oz7.4 gAbove Average |
| Dimensions |
L 0.866 in W 0.315 in H 0.602 in L 22.0 mm W 8.0 mm H 15.3 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless Brushed |
| Motor Drive | FET |
| Gears | Metal |
| Gear Spline/Teeth | 19 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Clockwise |
| Rotational Range | 90° |
| Mechanical Limit | 90° |
| Pulse Cycle | 3.003 ms |
| Pulse Width | 1100-1900 µs |
| Neutral Position | 1500 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Control System | PWM |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 3.7–8.4 V |
| Power Source | 2S LiPo |
| Temperature | -20–60 °C-4–140 °F |
| Idle Current | 0.002 A2 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 150 mm5.91 in |
| Origin | |
| Country of Origin | Taiwan |
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 | Below Average Stronger than 31% of 349 Digital Micro servos at 3.7V |
| Speed | Below Average Faster than 18% of 347 Digital Micro servos at 3.7V |
| Weight | Above Average Lighter than 81% of 597 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.27–1.17 W |
| Power Density | 7.150 W/in³ More power-dense than 91% of 563 Digital Micro servos |
| Torque Density | 3.0027 oz-in/g Stronger than 70% of 349 Digital Micro servos |
| Torque-to-Volume Ratio | 135.31 oz-in/in³ Denser torque than 81% of 345 Digital Micro servos |
| Speed-to-Weight | 0.90090 (1/sec·g) Faster than 65% of 347 Digital Micro servos |
| Speed-Torque Trade-off | 3.33 Better balanced than 53% of 345 Digital Micro servos |
| Torque Gain per Volt | 21.29%/V More voltage-responsive (torque) than 76% of 290 Digital Micro servos |
| Speed Gain per Volt | 24.31%/V More voltage-responsive (speed) than 83% of 295 Digital Micro servos |
| Voltage Range Width | 4.7 V Wider voltage range than 96% of 496 Digital Micro servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0025 Finer dead band than 19% of 182 Digital Micro servos |
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Reviews (12)
Includes 12 reviews aggregated from around the web.
Owners are positive. A UK glider retailer shows 12 reviews, with buyers calling it very good quality, a good choice for tight spots such as inside a V-tail, and impressively fast on 1S, with good centering and power in F3K, F5J and DLG gliders. One pilot used it in three DLGs, two of which went to the World Champs and performed faultlessly. Minor notes are that one unit arrived with centering problems and was replaced, and that the speed means it draws more battery than some rivals.
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