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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | BLS905X |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
111.04 oz-in
8.00 kg-cm
0.8 N-m
7.4V
97.16 oz-in
7.00 kg-cm
0.7 N-m
6.0V
83.28 oz-in
6.00 kg-cm
0.6 N-m
Below Average
|
| Speed |
8.4V
0.04 sec/60°
1,714.3 deg/s
285.7 RPM
7.4V
0.04 sec/60°
1,500.0 deg/s
250.0 RPM
6.0V
0.05 sec/60°
1,333.3 deg/s
222.2 RPM
Top 10%
|
| Physical | |
| Weight | 2.54 oz72.0 gBelow Average |
| Dimensions |
L 1.595 in W 0.787 in H 1.457 in L 40.5 mm W 20.0 mm H 37.0 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Steel |
| Gear Spline/Teeth | 25 T estimate |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Pulse Width | 450-1050 µs |
| Refresh Rate | 560 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Signal Voltage | 3.3–5V |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -10–65 °C14–149 °F |
| Connectivity | |
| Connector | JR (Universal) estimate |
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 | Below Average Stronger than 13% of 1055 Digital Standard servos at 6.0V |
| Speed | Top 10% Faster than 99% of 1038 Digital Standard servos at 6.0V |
| Weight | Below Average Lighter than 29% of 1872 Digital Standard servos |
Performance Analysis
| Shaft Power | 3.42–5.87 W |
| Power Density | 3.207 W/in³ More power-dense than 62% of 1762 Digital Standard servos |
| Torque Density | 1.1567 oz-in/g Stronger than 5% of 1048 Digital Standard servos |
| Torque-to-Volume Ratio | 45.54 oz-in/in³ Denser torque than 12% of 1053 Digital Standard servos |
| Speed-to-Weight | 0.30864 (1/sec·g) Faster than 96% of 1031 Digital Standard servos |
| Speed-Torque Trade-off | 3.75 Better balanced than 5% of 1029 Digital Standard servos |
| Torque Gain per Volt | 13.89%/V More voltage-responsive (torque) than 39% of 868 Digital Standard servos |
| Speed Gain per Volt | 11.91%/V More voltage-responsive (speed) than 28% of 868 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 58% of 1552 Digital Standard servos |
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Reviews (6)
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