Robbe FS 555 BB MG

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-09

Identity
Brand
Product Number	8537
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 79.30 oz-in 4.8V 67.90 oz-in Above Average
Speed	6.0V 0.12 sec/60° 4.8V 0.15 sec/60° Below Average
Physical
Weight	0.74 ozBottom 10%
Dimensions	L 1.18 in W 0.51 in H 1.10 in
Drivetrain
Motor Type	Coreless
Gears	Metal
Gear Spline/Teeth	25 T estimate
Rotation/Support	Single Bearing
Control & Signal
Modulation	Digital
Control System	PWM
Electrical & Environment
Operating Voltage	4.8–6 V
Connectivity
Connector	JR (Universal) estimate

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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

*Spec is estimated from brand data.

Class Comparison

Torque	Above Average Stronger than 88% of 328 Digital Micro servos at 4.8V
Speed	Below Average Faster than 18% of 328 Digital Micro servos at 4.8V
Weight	Bottom 10% Lighter than 9% of 620 Digital Micro servos

Performance Analysis

Shaft Power	0.84–1.22 W
Power Density	1.846 W/in³ More power-dense than 48% of 590 Digital Micro servos
Torque Density	3.2333 oz-in/g Stronger than 76% of 327 Digital Micro servos
Torque-to-Volume Ratio	102.57 oz-in/in³ Denser torque than 73% of 327 Digital Micro servos
Speed-to-Weight	0.31746 (1/sec·g) Faster than 3% of 327 Digital Micro servos
Speed-Torque Trade-off	10.19 Better balanced than 91% of 327 Digital Micro servos
Torque Gain per Volt	13.99%/V More voltage-responsive (torque) than 36% of 268 Digital Micro servos
Speed Gain per Volt	20.83%/V More voltage-responsive (speed) than 68% of 273 Digital Micro servos
Voltage Range Width	1.2 V Wider voltage range than 39% of 511 Digital Micro servos