SpringRC SR-401P

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-26

Identity
Brand
Product Number	SR401P
Category	Robotics
Performance
Torque	7.4V 69.40 oz-in 6.0V 52.80 oz-in Below Average
Speed	7.4V 0.16 sec/60° 6.0V 0.18 sec/60° Average
Physical
Weight	1.69 ozAverage
Shape	Boxed
Dimensions	L 1.583 in W 0.83 in H 1.69 in
Drivetrain
Gears	Plastic
Gear Spline/Teeth	25 T
Rotation Mode	Positional
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Analog
Rotational Range	180°
Neutral Position	1500 µs
Control System	PWM
Electrical & Environment
Operating Voltage	6–7.4 V
Connectivity
Wire Length	300 mm
Origin
Country of Origin	China

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Compatible Hardware

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*Based on known specs.

Class Comparison

Torque	Below Average Stronger than 32% of 198 Analog Standard servos at 6.0V
Speed	Average Faster than 59% of 195 Analog Standard servos at 6.0V
Weight	Average Lighter than 52% of 447 Analog Standard servos

Performance Analysis

Shaft Power	0.54–0.80 W
Power Density	0.361 W/in³ More power-dense than 25% of 432 Analog Standard servos
Torque Density	1.1000 oz-in/g Stronger than 22% of 198 Analog Standard servos
Torque-to-Volume Ratio	23.78 oz-in/in³ Denser torque than 14% of 198 Analog Standard servos
Speed-to-Weight	0.11574 (1/sec·g) Faster than 56% of 195 Analog Standard servos
Speed-Torque Trade-off	9.50 Better balanced than 28% of 195 Analog Standard servos
Torque Gain per Volt	22.46%/V More voltage-responsive (torque) than 89% of 156 Analog Standard servos
Speed Gain per Volt	8.94%/V More voltage-responsive (speed) than 6% of 156 Analog Standard servos
Voltage Range Width	1.4 V Wider voltage range than 87% of 239 Analog Standard servos