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Robbe FS 31
Micro

Robbe FS 31

Compatible Hardware

*Based on known specs.

Technical Specifications

Last Updated: 2026-10-09
Identity
Brand Robbe
Product Number 8449
Category Hobby
Performance
Torque
6.0V 15.28 oz-in
4.8V 12.50 oz-in
Speed
6.0V 0.16 sec/60°
4.8V 0.19 sec/60°
Physical
Weight 0.17 ozAbove Average
Dimensions L 0.669 in
W 0.315 in
H 0.866 in
Case Material Aluminum
Drivetrain
Gears Plastic
Gear Spline/Teeth 15 T
Rotation/Support Bushing
Control & Signal
Modulation Analog
Control System PWM
Electrical & Environment
Operating Voltage 3.3–8.4 V
Power Source 2S LiPo
Water Rating IP56/67
Connectivity
Connector JR (Universal) estimate
Origin
Country of Origin Austria

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

WeightAbove Average
Lighter than 81% of 346 Analog Micro servos

Performance Analysis

Shaft Power 0.12–0.18 W
Power Density0.968 W/in³
More power-dense than 60% of 333 Analog Micro servos
Torque Density2.6596 oz-in/g
Torque-to-Volume Ratio68.49 oz-in/in³
Speed-to-Weight1.11982 (1/sec·g)
Speed-Torque Trade-off2.37
Voltage Range Width5.1 V
1st-highest voltage range width of 182 Analog Micro servos

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