SpringRC SM-S8166M

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-08

Identity
Brand
Category	Hobby
Performance
Torque	6.0V 459.00 oz-in 4.8V 417.40 oz-in Top 10%
Speed	6.0V 0.21 sec/60° 4.8V 0.25 sec/60° Average
Physical
Weight	5.64 ozBelow Average
Dimensions	L 2.362 in W 1.102 in H 2.362 in
Drivetrain
Motor Type	Brushed
Gears	Hybrid
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Analog
Rotational Range	60°
Neutral Position	1500 µs
Control System	PWM
Electrical & Environment
Operating Voltage	4.8–6 V
Power Source	DC
Temperature	-30–60 °C
Connectivity
Connector	JR (Universal)
Wire Length	300 mm
Origin
Country of Origin	China

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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.

Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Top 10% Stronger than 96% of 24 Analog Giant servos at 4.8V
Speed	Average Faster than 50% of 23 Analog Giant servos at 4.8V
Weight	Below Average Lighter than 24% of 59 Analog Giant servos

Performance Analysis

Shaft Power	3.09–4.04 W
Power Density	0.657 W/in³ More power-dense than 81% of 58 Analog Giant servos
Torque Density	2.6088 oz-in/g 2nd-highest torque density of 24 Analog Giant servos
Torque-to-Volume Ratio	67.89 oz-in/in³ 2nd-highest torque-to-volume ratio of 24 Analog Giant servos
Speed-to-Weight	0.02500 (1/sec·g) Faster than 18% of 23 Analog Giant servos
Speed-Torque Trade-off	104.35 4th-highest speed-torque trade-off of 23 Analog Giant servos
Torque Gain per Volt	8.31%/V More voltage-responsive (torque) than 0% of 22 Analog Giant servos
Speed Gain per Volt	15.87%/V More voltage-responsive (speed) than 20% of 21 Analog Giant servos
Voltage Range Width	1.2 V Wider voltage range than 22% of 24 Analog Giant servos