SpringRC SM-S8166B

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-10

Identity
Brand
Product Number	SM-S8166B
Category	Hobby
Performance
Torque	6.0V 278.20 oz-in 4.8V 229.50 oz-in Average
Speed	6.0V 0.21 sec/60° 4.8V 0.25 sec/60° Average
Physical
Weight	4.27 ozAbove Average
Dimensions	L 2.362 in W 1.102 in H 2.362 in
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

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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	Average Stronger than 48% of 24 Analog Giant servos at 4.8V
Speed	Average Faster than 55% of 23 Analog Giant servos at 4.8V
Weight	Above Average Lighter than 71% of 59 Analog Giant servos

Performance Analysis

Shaft Power	1.70–2.45 W
Power Density	0.398 W/in³ More power-dense than 46% of 58 Analog Giant servos
Torque Density	1.8967 oz-in/g Stronger than 70% of 24 Analog Giant servos
Torque-to-Volume Ratio	37.33 oz-in/in³ Denser torque than 52% of 24 Analog Giant servos
Speed-to-Weight	0.03306 (1/sec·g) Faster than 64% of 23 Analog Giant servos
Speed-Torque Trade-off	57.38 Better balanced than 64% of 23 Analog Giant servos
Torque Gain per Volt	17.68%/V More voltage-responsive (torque) than 33% of 22 Analog Giant servos
Speed Gain per Volt	15.87%/V More voltage-responsive (speed) than 25% of 21 Analog Giant servos
Voltage Range Width	1.2 V Wider voltage range than 30% of 24 Analog Giant servos