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Technical Specifications
Last Updated: 2026-10-26
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
Top 10%
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
|
| 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
Average
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
|
| Stall Current | 3.5–8.4 A3500–8400 mABottom 10% |
| 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 | Steel |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 125° |
| Mechanical Limit | 125° |
| Pulse Cycle | 3.03 ms |
| 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 | 7.4–12 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 | Top 10% Stronger than 97% of 1059 Digital Standard servos at 7.4V |
| Speed | Average Faster than 38% of 1044 Digital Standard servos at 7.4V |
| Weight | Bottom 10% Lighter than 1% of 1879 Digital Standard servos |
| Stall Current | Bottom 10% Lower draw than 5% of 570 Digital Standard servos |
Performance Analysis
| Torque Density | 6.8681 oz-in/g Stronger than 93% of 1052 Digital Standard servos |
| Torque-to-Volume Ratio | 312.99 oz-in/in³ Denser torque than 96% of 1057 Digital Standard servos |
| Speed-to-Weight | 0.06955 (1/sec·g) Faster than 7% of 1037 Digital Standard servos |
| Speed-Torque Trade-off | 98.76 Better balanced than 96% of 1033 Digital Standard servos |
| Current-per-Torque Ratio | 0.0134 A/oz-in More efficient than 56% of 331 Digital Standard servos |
| Torque Gain per Volt | 9.74%/V More voltage-responsive (torque) than 16% of 872 Digital Standard servos |
| Speed Gain per Volt | 14.04%/V More voltage-responsive (speed) than 42% of 873 Digital Standard servos |
| Voltage Range Width | 4.6 V Wider voltage range than 95% of 1559 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0014 Finer dead band than 53% of 504 Digital Standard servos |
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