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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | OMG-ST-40BF |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
556.00 oz-in
40.04 kg-cm
3.9 N-m
7.4V
528.00 oz-in
38.02 kg-cm
3.7 N-m
|
| Speed |
8.4V
0.07 sec/60°
923.1 deg/s
153.8 RPM
7.4V
0.08 sec/60°
769.2 deg/s
128.2 RPM
|
| Physical | |
| Weight | 2.79 oz79.0 gBelow Average |
| Dimensions |
L 1.57 in W 0.79 in H 1.50 in L 39.9 mm W 20.1 mm H 38.1 mm |
| Case Material | Metal |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Titanium / Steel |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 180° |
| Mechanical Limit | 180° |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1520 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -15–70 °C5–158 °F |
| Water Rating | IP67 |
| Connectivity | |
| Wire Length | 300 mm11.81 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
| Weight | Below Average Lighter than 12% of 1880 Digital Standard servos |
Performance Analysis
| Shaft Power | 12.52–15.82 W |
| Power Density | 8.501 W/in³ More power-dense than 95% of 1768 Digital Standard servos |
| Torque Density | 6.6835 oz-in/g |
| Torque-to-Volume Ratio | 283.80 oz-in/in³ |
| Speed-to-Weight | 0.16229 (1/sec·g) |
| Speed-Torque Trade-off | 41.19 |
| Voltage Range Width | 2.4 V Wider voltage range than 47% of 1560 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 67% of 504 Digital Standard servos |
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