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Technical Specifications
Last Updated: 2026-07-10
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Identity
Performance
Physical
Drivetrain
Control & Signal
Electrical & Environment
Connectivity
Origin
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Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | CYS-S8218 |
| Category | Hobby |
| Performance | |
| Torque |
7.2V
555.50 oz-in
40.00 kg-cm
3.9 N-m
6.0V
527.72 oz-in
38.00 kg-cm
3.7 N-m
|
| Speed |
7.2V
0.18 sec/60°
333.3 deg/s
55.6 RPM
6.0V
0.20 sec/60°
300.0 deg/s
50.0 RPM
|
| Running Current | (add) |
| Stall Current | 7.5–8.6 A7500–8600 mA |
| Physical | |
| Weight | 5.78 oz164.0 g |
| Dimensions |
L 2.34 in W 1.15 in H 2.17 in L 59.5 mm W 29.2 mm H 55.2 mm |
| Case Material | (add) |
| Drivetrain | |
| Motor Type | Brushed |
| Motor Drive | (add) |
| Gears | Metal |
| Gear Spline/Teeth | 17 T |
| Shaft Size | (add) |
| Rotation Mode | (add) |
| Rotation/Support | Dual Bearings |
| Backlash | (add) |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 90° |
| Mechanical Limit | (add) |
| Pulse Cycle | 50 ms |
| Pulse Width | 1000-2000 µs |
| Neutral Position | 1500 µs |
| Dead Band | 4 µs |
| Refresh Rate | (add) |
| Angle Sensor | (add) |
| Control System | PWM |
| Programmable | (add) |
| Signal Voltage | (add) |
| Electrical & Environment | |
| Operating Voltage | 6–7.4 V |
| Power Source | (add) |
| Regulator Type | (add) |
| Temperature | -10–50 °C14–122 °F |
| Water Rating | (add) |
| Certification | (add) |
| Idle Current | (add) |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 300 mm11.81 in |
| 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.
Performance Analysis
| Shaft Power | 4.88–5.71 W |
| Torque Density | 3.2178 oz-in/g Stronger than 51% of the 79 Digital Giant servos in the database |
| Torque-to-Volume Ratio | 90.13 oz-in/in³ Denser torque than 43% of the 88 Digital Giant servos in the database |
| Power Density | 0.975 W/in³ More power-dense than 44% of the 108 Digital Giant servos in the database |
| Speed-to-Weight | 0.03049 (1/sec·g) Faster than 66% of the 77 Digital Giant servos in the database |
| Speed-Torque Trade-off | 105.54 Better balanced than 44% of the 82 Digital Giant servos in the database |
| Current-per-Torque Ratio | 0.0163 A/oz-in More efficient than 24% of the 42 Digital Giant servos in the database |
| Voltage Range Width | 1.4 V Wider voltage range than 29% of the 155 Digital Giant servos in the database |
| Dead-Band-to-Pulse-Width Ratio | 0.0040 Finer dead band than 0% of the 21 Digital Giant servos in the database |
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