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Technical Specifications
Last Updated: 2026-10-23| Identity | |
| Brand |  |
| Product Number | KST-X08H-PLUS |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
73.56 oz-in
5.30 kg-cm
0.5 N-m
7.4V
67.18 oz-in
4.84 kg-cm
0.5 N-m
6.0V
52.74 oz-in
3.80 kg-cm
0.4 N-m
3.8V
33.31 oz-in
2.40 kg-cm
0.2 N-m
Average
|
| Speed |
8.4V
0.09 sec/60°
666.7 deg/s
111.1 RPM
7.4V
0.12 sec/60°
500.0 deg/s
83.3 RPM
6.0V
0.15 sec/60°
400.0 deg/s
66.7 RPM
3.8V
0.18 sec/60°
333.3 deg/s
55.6 RPM
Bottom 10%
|
| Physical | |
| Weight | 0.32 oz9.0 gAverage |
| Dimensions |
L 0.925 in W 0.315 in H 0.661 in L 23.5 mm W 8.0 mm H 16.8 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Steel |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 120° |
| Pulse Width | 1000-2000 µs |
| Neutral Position | 1520 µs |
| Dead Band | 2 µs |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 3.8–8.4 V |
| Temperature | -10–65 °C14–149 °F |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 100 mm3.94 in |
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 | Average Stronger than 61% of 363 Digital Micro servos at 3.8V |
| Speed | Bottom 10% Faster than 8% of 361 Digital Micro servos at 3.8V |
| Weight | Average Lighter than 63% of 665 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.34–1.51 W |
| Power Density | 7.840 W/in³ More power-dense than 92% of 625 Digital Micro servos |
| Torque Density | 3.7011 oz-in/g Stronger than 84% of 363 Digital Micro servos |
| Torque-to-Volume Ratio | 172.81 oz-in/in³ Denser torque than 89% of 359 Digital Micro servos |
| Speed-to-Weight | 0.61728 (1/sec·g) Faster than 40% of 361 Digital Micro servos |
| Speed-Torque Trade-off | 6.00 Better balanced than 74% of 358 Digital Micro servos |
| Torque Gain per Volt | 26.27%/V More voltage-responsive (torque) than 87% of 302 Digital Micro servos |
| Speed Gain per Volt | 21.75%/V More voltage-responsive (speed) than 71% of 305 Digital Micro servos |
| Voltage Range Width | 4.6 V Wider voltage range than 92% of 553 Digital Micro servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0020 Finer dead band than 27% of 220 Digital Micro servos |
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Reviews (13)
Includes 13 reviews aggregated from around the web.
Owners are mostly very happy with this servo, especially in sailplane and slope-soarer wings, where the small size and torque suit elevator and aileron duty. Buyers call it precise, good value and a solid choice for thin wings, with minimal but not zero backlash. The main concern is reliability: one owner reported that about half of his units suddenly stopped responding because of an electronics failure and advised against using them on critical controls, and another bought replacements after identical servos died suddenly. One owner also dislikes the small exposed can and thin wires. There are only a dozen or so reviews for this servo on the web.
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