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Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | SM-S8166B |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
278.20 oz-in
20.03 kg-cm
2.0 N-m
4.8V
229.50 oz-in
16.53 kg-cm
1.6 N-m
Average
|
| Speed |
6.0V
0.21 sec/60°
285.7 deg/s
47.6 RPM
4.8V
0.25 sec/60°
240.0 deg/s
40.0 RPM
Below Average
|
| Physical | |
| Weight | 4.27 oz121.0 gBelow Average |
| Dimensions |
L 2.362 in W 1.102 in H 2.362 in L 60.0 mm W 28.0 mm H 60.0 mm |
| Drivetrain | |
| Motor Type | Brushed |
| Gears | Plastic |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Analog |
| Rotational Range | 180° |
| Neutral Position | 1500 µs |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Connectivity | |
| Connector | JR (Universal) |
| 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 | Average Stronger than 44% of 40 Large servos at 4.8V |
| Speed | Below Average Faster than 26% of 40 Large servos at 4.8V |
| Weight | Below Average Lighter than 20% of 174 Large servos |
Performance Analysis
| Shaft Power | 1.70–2.45 W |
| Power Density | 0.398 W/in³ More power-dense than 14% of 97 Springrc servos |
| Torque Density | 1.8967 oz-in/g Stronger than 55% of 41 Springrc servos |
| Torque-to-Volume Ratio | 37.33 oz-in/in³ Denser torque than 28% of 41 Springrc servos |
| Speed-to-Weight | 0.03306 (1/sec·g) Faster than 5% of 41 Springrc servos |
| Speed-Torque Trade-off | 57.38 3rd-highest speed-torque trade-off of 41 Springrc servos |
| Torque Gain per Volt | 17.68%/V More voltage-responsive (torque) than 74% of 40 Springrc servos |
| Speed Gain per Volt | 15.87%/V More voltage-responsive (speed) than 59% of 40 Springrc servos |
| Voltage Range Width | 1.2 V Wider voltage range than 30% of 44 Springrc servos |
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