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Technical Specifications
Last Updated: 2026-10-09
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | B251 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
799.91 oz-in
57.60 kg-cm
5.6 N-m
7.4V
672.15 oz-in
48.40 kg-cm
4.7 N-m
6.0V
543.00 oz-in
39.10 kg-cm
3.8 N-m
|
| Speed |
8.4V
0.08 sec/60°
750.0 deg/s
125.0 RPM
7.4V
0.09 sec/60°
666.7 deg/s
111.1 RPM
6.0V
0.11 sec/60°
545.5 deg/s
90.9 RPM
|
| Physical | |
| Weight | 2.64 oz74.8 gBelow Average |
| Dimensions |
L 1.56 in W 0.79 in H 1.55 in L 39.6 mm W 20.1 mm H 39.4 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Steel |
| Gear Spline/Teeth | 25 T |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Temperature | -10–60 °C14–140 °F |
| Connectivity | |
| Wire Length | 200 mm7.87 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 21% of 1902 Digital Standard servos |
Performance Analysis
| Shaft Power | 9.13–18.49 W |
| Power Density | 9.678 W/in³ More power-dense than 97% of 1759 Digital Standard servos |
| Torque Density | 7.2594 oz-in/g |
| Torque-to-Volume Ratio | 284.26 oz-in/in³ |
| Speed-to-Weight | 0.12154 (1/sec·g) |
| Speed-Torque Trade-off | 59.73 |
| Voltage Range Width | 3.6 V Wider voltage range than 81% of 1539 Digital Standard servos |
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