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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | KST-0420 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
444.16 oz-in
31.98 kg-cm
3.1 N-m
7.4V
416.40 oz-in
29.98 kg-cm
2.9 N-m
6.0V
333.12 oz-in
23.99 kg-cm
2.4 N-m
Above Average
|
| Speed |
8.4V
0.05 sec/60°
1,276.6 deg/s
212.8 RPM
7.4V
0.05 sec/60°
1,153.8 deg/s
192.3 RPM
6.0V
0.07 sec/60°
895.5 deg/s
149.3 RPM
Top 10%
|
| Physical | |
| Weight | 2.47 oz70.0 gAverage |
| Dimensions |
L 1.595 in W 0.787 in H 1.496 in L 40.5 mm W 20.0 mm H 38.0 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | 4-pole |
| Gears | Steel |
| Gear Spline/Teeth | 25 T estimate |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 100° |
| Pulse Cycle | 3.003 ms |
| Neutral Position | 1520 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -20–65 °C-4–149 °F |
| Water Rating | IP65 |
| 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 | Above Average Stronger than 73% of 1060 Digital Standard servos at 6.0V |
| Speed | Top 10% Faster than 92% of 1045 Digital Standard servos at 6.0V |
| Weight | Average Lighter than 35% of 1880 Digital Standard servos |
Performance Analysis
| Shaft Power | 9.19–17.47 W |
| Power Density | 9.302 W/in³ More power-dense than 97% of 1768 Digital Standard servos |
| Torque Density | 4.7589 oz-in/g Stronger than 75% of 1053 Digital Standard servos |
| Torque-to-Volume Ratio | 177.35 oz-in/in³ Denser torque than 76% of 1058 Digital Standard servos |
| Speed-to-Weight | 0.21322 (1/sec·g) Faster than 89% of 1038 Digital Standard servos |
| Speed-Torque Trade-off | 22.32 Better balanced than 40% of 1034 Digital Standard servos |
| Torque Gain per Volt | 13.89%/V More voltage-responsive (torque) than 39% of 873 Digital Standard servos |
| Speed Gain per Volt | 17.73%/V More voltage-responsive (speed) than 63% of 874 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 57% of 1560 Digital Standard servos |
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