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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | OMG-D4-20BF |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
319.00 oz-in
22.97 kg-cm
2.3 N-m
7.4V
305.00 oz-in
21.96 kg-cm
2.2 N-m
6.0V
278.00 oz-in
20.02 kg-cm
2.0 N-m
4.8V
250.00 oz-in
18.00 kg-cm
1.8 N-m
Above Average
|
| Speed |
8.4V
0.05 sec/60°
1,200.0 deg/s
200.0 RPM
7.4V
0.06 sec/60°
1,090.9 deg/s
181.8 RPM
6.0V
0.06 sec/60°
1,000.0 deg/s
166.7 RPM
4.8V
0.07 sec/60°
857.1 deg/s
142.9 RPM
Above Average
|
| Stall Current | ≤3.2 A≤3200 mAAverage |
| Physical | |
| Weight | 2.05 oz58.0 gBelow Average |
| Dimensions |
L 1.61 in W 0.81 in H 1.14 in L 40.9 mm W 20.6 mm H 29.0 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Stainless Steel |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 120° |
| Mechanical Limit | 120° |
| Pulse Cycle | 3.003 ms |
| Neutral Position | 1520 µs |
| Refresh Rate | 333 Hz |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Regulator Type | BEC |
| Connectivity | |
| Connector | JR (Universal) |
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 90% of 136 Digital Low Profile servos at 4.8V |
| Speed | Above Average Faster than 78% of 135 Digital Low Profile servos at 4.8V |
| Weight | Below Average Lighter than 18% of 251 Digital Low Profile servos |
| Stall Current | Average Lower draw than 54% of 64 Digital Low Profile servos |
Performance Analysis
| Shaft Power | 6.60–11.80 W |
| Power Density | 7.935 W/in³ More power-dense than 90% of 215 Digital Low Profile servos |
| Torque Density | 4.3103 oz-in/g Stronger than 88% of 136 Digital Low Profile servos |
| Torque-to-Volume Ratio | 168.16 oz-in/in³ Denser torque than 84% of 136 Digital Low Profile servos |
| Speed-to-Weight | 0.24631 (1/sec·g) Faster than 66% of 135 Digital Low Profile servos |
| Speed-Torque Trade-off | 17.50 Better balanced than 68% of 134 Digital Low Profile servos |
| Current-per-Torque Ratio | 0.0128 A/oz-in More efficient than 85% of 40 Digital Low Profile servos |
| Torque Gain per Volt | 7.67%/V More voltage-responsive (torque) than 4% of 115 Digital Low Profile servos |
| Speed Gain per Volt | 11.11%/V More voltage-responsive (speed) than 29% of 117 Digital Low Profile servos |
| Voltage Range Width | 3.6 V Wider voltage range than 72% of 223 Digital Low Profile servos |
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