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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | OMG-ST-20DM/PRO |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
333.00 oz-in
23.98 kg-cm
2.4 N-m
7.4V
306.00 oz-in
22.03 kg-cm
2.2 N-m
Above Average
|
| Speed |
8.4V
0.15 sec/60°
400.0 deg/s
66.7 RPM
7.4V
0.16 sec/60°
375.0 deg/s
62.5 RPM
Below Average
|
| Physical | |
| Weight | 2.29 oz65.0 gAverage |
| Dimensions |
L 1.61 in W 0.79 in H 1.57 in L 40.9 mm W 20.1 mm H 39.9 mm |
| Case Material | Metal / Plastic |
| Drivetrain | |
| Motor Type | Brushed |
| Gears | Copper |
| 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 | No |
| Electrical & Environment | |
| Operating Voltage | 7.4–8.4 V |
| Temperature | -15–70 °C5–158 °F |
| Water Rating | Water Resistant |
| 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
| Torque | Above Average Stronger than 69% of 1043 Digital Standard servos at 7.4V |
| Speed | Below Average Faster than 30% of 1041 Digital Standard servos at 7.4V |
| Weight | Average Lighter than 43% of 1902 Digital Standard servos |
Performance Analysis
| Shaft Power | 3.54–4.10 W |
| Power Density | 2.056 W/in³ More power-dense than 45% of 1759 Digital Standard servos |
| Torque Density | 4.7077 oz-in/g Stronger than 73% of 1036 Digital Standard servos |
| Torque-to-Volume Ratio | 153.24 oz-in/in³ Denser torque than 64% of 1042 Digital Standard servos |
| Speed-to-Weight | 0.09615 (1/sec·g) Faster than 31% of 1033 Digital Standard servos |
| Speed-Torque Trade-off | 48.96 Better balanced than 74% of 1031 Digital Standard servos |
| Torque Gain per Volt | 8.82%/V More voltage-responsive (torque) than 14% of 850 Digital Standard servos |
| Speed Gain per Volt | 6.67%/V More voltage-responsive (speed) than 4% of 871 Digital Standard servos |
| Voltage Range Width | 1.0 V Wider voltage range than 3% of 1539 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 68% of 468 Digital Standard servos |
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