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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | A20BHM |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
158.00 oz-in
11.38 kg-cm
1.1 N-m
7.4V
142.00 oz-in
10.23 kg-cm
1.0 N-m
6.0V
118.00 oz-in
8.50 kg-cm
0.8 N-m
4.8V
100.00 oz-in
7.20 kg-cm
0.7 N-m
Above Average
|
| Speed |
8.4V
0.07 sec/60°
882.4 deg/s
147.1 RPM
7.4V
0.08 sec/60°
800.0 deg/s
133.3 RPM
6.0V
0.09 sec/60°
652.2 deg/s
108.7 RPM
4.8V
0.11 sec/60°
571.4 deg/s
95.2 RPM
Average
|
| Physical | |
| Weight | 0.74 oz21.0 gAbove Average |
| Dimensions |
L 0.91 in W 0.47 in H 1.08 in L 23.1 mm W 11.9 mm H 27.4 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Motor Drive | FET |
| Gears | Steel |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 180° |
| Mechanical Limit | No Limit |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1520 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Temperature | -15–70 °C5–158 °F |
| Certification | CE | ROHS | FCC |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 180 mm7.09 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 | Above Average Stronger than 82% of 284 Digital Mini servos at 4.8V |
| Speed | Average Faster than 56% of 288 Digital Mini servos at 4.8V |
| Weight | Above Average Lighter than 68% of 490 Digital Mini servos |
Performance Analysis
| Shaft Power | 1.76–4.30 W |
| Power Density | 9.301 W/in³ More power-dense than 98% of 468 Digital Mini servos |
| Torque Density | 4.7619 oz-in/g Stronger than 94% of 280 Digital Mini servos |
| Torque-to-Volume Ratio | 216.49 oz-in/in³ Denser torque than 97% of 282 Digital Mini servos |
| Speed-to-Weight | 0.45352 (1/sec·g) Faster than 71% of 284 Digital Mini servos |
| Speed-Torque Trade-off | 10.50 Better balanced than 74% of 282 Digital Mini servos |
| Torque Gain per Volt | 16.11%/V More voltage-responsive (torque) than 50% of 252 Digital Mini servos |
| Speed Gain per Volt | 15.12%/V More voltage-responsive (speed) than 39% of 258 Digital Mini servos |
| Voltage Range Width | 3.6 V Wider voltage range than 80% of 396 Digital Mini servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 80% of 96 Digital Mini servos |
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