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Technical Specifications
Last Updated: 2026-07-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | DS905BLWR |
| Category | Hobby |
| Performance | |
| Torque |
12.0V
905.00 oz-in
65.17 kg-cm
6.4 N-m
8.4V
755.00 oz-in
54.37 kg-cm
5.3 N-m
7.4V
625.00 oz-in
45.00 kg-cm
4.4 N-m
6.6V
505.00 oz-in
36.36 kg-cm
3.6 N-m
6.0V
425.00 oz-in
30.60 kg-cm
3.0 N-m
Above Average
|
| Speed |
12.0V
0.10 sec/60°
625.0 deg/s
104.2 RPM
8.4V
0.13 sec/60°
451.1 deg/s
75.2 RPM
7.4V
0.16 sec/60°
379.7 deg/s
63.3 RPM
6.6V
0.17 sec/60°
359.3 deg/s
59.9 RPM
6.0V
0.17 sec/60°
346.8 deg/s
57.8 RPM
Below Average
|
| Stall Current | 3.5–8.4 A3500–8400 mABelow Average |
| Physical | |
| Weight | 3.21 oz91.0 gBottom 10% |
| Dimensions |
L 1.57 in W 0.79 in H 1.61 in L 39.9 mm W 20.1 mm H 40.9 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Metal |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Standard |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 125° |
| Mechanical Limit | 125° |
| Pulse Width | 800-2200 µs |
| Neutral Position | 1500 µs |
| Dead Band | 2 µs |
| Refresh Rate | 330 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 6–12 V |
| Temperature | -10–50 °C14–122 °F |
| Water Rating | Water Resistant |
| 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 86% of 844 Digital Standard servos at 6.0V |
| Speed | Below Average Faster than 22% of 832 Digital Standard servos at 6.0V |
| Weight | Bottom 10% Lighter than 1% of 1818 Digital Standard servos |
| Stall Current | Below Average Lower draw than 12% of 403 Digital Standard servos |
Performance Analysis
| Torque Density | 4.6703 oz-in/g Stronger than 73% of 833 Digital Standard servos |
| Torque-to-Volume Ratio | 212.83 oz-in/in³ Denser torque than 85% of 844 Digital Standard servos |
| Speed-to-Weight | 0.06352 (1/sec·g) Faster than 3% of 822 Digital Standard servos |
| Speed-Torque Trade-off | 73.53 Better balanced than 91% of 827 Digital Standard servos |
| Current-per-Torque Ratio | 0.0198 A/oz-in More efficient than 36% of 232 Digital Standard servos |
| Torque Gain per Volt | 18.82%/V More voltage-responsive (torque) than 73% of 674 Digital Standard servos |
| Speed Gain per Volt | 13.37%/V More voltage-responsive (speed) than 36% of 688 Digital Standard servos |
| Voltage Range Width | 6.0 V Wider voltage range than 98% of 1271 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0014 Finer dead band than 58% of 329 Digital Standard servos |
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