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Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | SRT-BHX9 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
1,041.60 oz-in
75.00 kg-cm
7.4 N-m
7.4V
902.70 oz-in
65.00 kg-cm
6.4 N-m
6.0V
763.80 oz-in
55.00 kg-cm
5.4 N-m
Top 10%
|
| Speed |
8.4V
0.10 sec/60°
600.0 deg/s
100.0 RPM
7.4V
0.11 sec/60°
545.5 deg/s
90.9 RPM
6.0V
0.15 sec/60°
400.0 deg/s
66.7 RPM
Average
|
| Running Current |
8.4V
0.400 A
400 mA
7.4V
0.300 A
300 mA
6.0V
0.300 A
300 mA
Below Average
|
| Stall Current | 2–2.6 A2000–2600 mAAbove Average |
| Physical | |
| Weight | 2.89 oz82.0 gBottom 10% |
| Dimensions |
L 1.57 in W 0.79 in H 1.54 in L 39.9 mm W 20.1 mm H 39.1 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Steel |
| Gear Spline/Teeth | 25 T estimate |
| Shaft Size | 5.9 mm |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Clockwise |
| Rotational Range | 90° |
| Mechanical Limit | 180° |
| Pulse Cycle | 3 ms |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1500 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Power Source | 2S LiPo |
| Temperature | -10–50 °C14–122 °F |
| Idle Current | 0.070 A70 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 300 mm11.81 in |
| Origin | |
| Country of Origin | China |
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 | Top 10% Stronger than 99% of 1055 Digital Standard servos at 6.0V |
| Speed | Average Faster than 39% of 1038 Digital Standard servos at 6.0V |
| Weight | Bottom 10% Lighter than 7% of 1872 Digital Standard servos |
| Running Current | Below Average Lower draw than 33% of 226 Digital Standard servos at 6.0V |
| Stall Current | Above Average Lower draw than 72% of 569 Digital Standard servos |
Performance Analysis
| Shaft Power | 9.42–19.26 W |
| Power Density | 10.083 W/in³ More power-dense than 98% of 1762 Digital Standard servos |
| Torque Density | 9.3146 oz-in/g Stronger than 100% of 1048 Digital Standard servos |
| Torque-to-Volume Ratio | 399.88 oz-in/in³ Denser torque than 99% of 1053 Digital Standard servos |
| Speed-to-Weight | 0.08130 (1/sec·g) Faster than 16% of 1031 Digital Standard servos |
| Speed-Torque Trade-off | 114.57 Better balanced than 98% of 1029 Digital Standard servos |
| Current-per-Torque Ratio | 0.0034 A/oz-in 2nd-highest current-per-torque ratio of 330 Digital Standard servos |
| Idle-to-Running Current Ratio | 0.233 Lower idle draw than 14% of 167 Digital Standard servos |
| No-Load vs Stall Current Spread | 8.67 Narrower current spread than 77% of 179 Digital Standard servos |
| Torque Gain per Volt | 15.15%/V More voltage-responsive (torque) than 46% of 868 Digital Standard servos |
| Speed Gain per Volt | 20.83%/V More voltage-responsive (speed) than 81% of 868 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 47% of 1552 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 77% of 501 Digital Standard servos |
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