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Technical Specifications
Last Updated: 2026-10-23
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | KST-1405 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
83.28 oz-in
6.00 kg-cm
0.6 N-m
7.4V
72.17 oz-in
5.20 kg-cm
0.5 N-m
6.0V
62.46 oz-in
4.50 kg-cm
0.4 N-m
3.8V
38.87 oz-in
2.80 kg-cm
0.3 N-m
Above Average
|
| Speed |
8.4V
0.09 sec/60°
666.7 deg/s
111.1 RPM
7.4V
0.11 sec/60°
545.5 deg/s
90.9 RPM
6.0V
0.13 sec/60°
461.5 deg/s
76.9 RPM
3.8V
0.21 sec/60°
285.7 deg/s
47.6 RPM
Bottom 10%
|
| Stall Current | ≤0.68 A≤680 mAAbove Average |
| Physical | |
| Weight | 0.39 oz11.0 gAverage |
| Dimensions |
L 0.925 in W 0.315 in H 0.996 in L 23.5 mm W 8.0 mm H 25.3 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Steel |
| Gear Spline/Teeth | 15 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 120° |
| Pulse Cycle | 3.003 ms |
| Pulse Width | 1000-2000 µs |
| Neutral Position | 1500 µs |
| Dead Band | 1 µs |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | Yes |
| Signal Voltage | 3.3–5V |
| Electrical & Environment | |
| Operating Voltage | 3.8–8.4 V |
| Temperature | -20–65 °C-4–149 °F |
| Connectivity | |
| Connector | JR (Universal) estimate |
| 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 | Above Average Stronger than 72% of 349 Digital Micro servos at 3.8V |
| Speed | Bottom 10% Faster than 1% of 347 Digital Micro servos at 3.8V |
| Weight | Average Lighter than 49% of 597 Digital Micro servos |
| Stall Current | Above Average Lower draw than 75% of 188 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.34–1.71 W |
| Power Density | 5.894 W/in³ More power-dense than 85% of 563 Digital Micro servos |
| Torque Density | 3.5336 oz-in/g Stronger than 81% of 349 Digital Micro servos |
| Torque-to-Volume Ratio | 133.90 oz-in/in³ Denser torque than 79% of 345 Digital Micro servos |
| Speed-to-Weight | 0.43290 (1/sec·g) Faster than 12% of 347 Digital Micro servos |
| Speed-Torque Trade-off | 8.16 Better balanced than 86% of 345 Digital Micro servos |
| Current-per-Torque Ratio | 0.0175 A/oz-in 5th-highest current-per-torque ratio of 98 Digital Micro servos |
| Torque Gain per Volt | 24.84%/V More voltage-responsive (torque) than 85% of 290 Digital Micro servos |
| Speed Gain per Volt | 28.99%/V More voltage-responsive (speed) than 96% of 295 Digital Micro servos |
| Voltage Range Width | 4.6 V Wider voltage range than 93% of 496 Digital Micro servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 72% of 182 Digital Micro servos |
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