Discover XQ-Power Servos in Our eBay Store!
Shop Now
Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | 9124 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
556.99 oz-in
40.11 kg-cm
3.9 N-m
6.0V
447.26 oz-in
32.21 kg-cm
3.2 N-m
Above Average
|
| Speed |
8.4V
0.09 sec/60°
666.7 deg/s
111.1 RPM
6.0V
0.11 sec/60°
545.5 deg/s
90.9 RPM
Above Average
|
| Physical | |
| Weight | 3.07 oz87.0 gBottom 10% |
| Dimensions |
L 1.594 in W 0.807 in H 1.575 in L 40.5 mm W 20.5 mm H 40.0 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Metal |
| Gear Spline/Teeth | 25 T |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Control System | Digital (Brushless) |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Water Rating | Waterproof |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Origin | |
| Country of Origin | German |
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 88% of 1043 Digital Standard servos at 6.0V |
| Speed | Above Average Faster than 70% of 1041 Digital Standard servos at 6.0V |
| Weight | Bottom 10% Lighter than 3% of 1902 Digital Standard servos |
Performance Analysis
| Shaft Power | 7.52–11.44 W |
| Power Density | 5.648 W/in³ More power-dense than 82% of 1759 Digital Standard servos |
| Torque Density | 5.1409 oz-in/g Stronger than 79% of 1036 Digital Standard servos |
| Torque-to-Volume Ratio | 220.76 oz-in/in³ Denser torque than 87% of 1042 Digital Standard servos |
| Speed-to-Weight | 0.10449 (1/sec·g) Faster than 39% of 1033 Digital Standard servos |
| Speed-Torque Trade-off | 49.19 Better balanced than 75% of 1031 Digital Standard servos |
| Torque Gain per Volt | 10.22%/V More voltage-responsive (torque) than 20% of 850 Digital Standard servos |
| Speed Gain per Volt | 9.26%/V More voltage-responsive (speed) than 13% of 871 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 53% of 1539 Digital Standard servos |
Similar Active Servos
Reviews of Robbe FS-7740
Be the first to review!