Robbe FS 555 BB MG

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-11-05

Identity
Brand
Product Number	8537
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 79.30 oz-in 4.8V 67.90 oz-in Average
Speed	6.0V 0.12 sec/60° 4.8V 0.15 sec/60° Below Average
Physical
Weight	0.74 ozAbove Average
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	Average Stronger than 61% of 290 Digital Mini servos at 4.8V
Speed	Below Average Faster than 26% of 293 Digital Mini servos at 4.8V
Weight	Above Average Lighter than 71% of 505 Digital Mini servos

Performance Analysis

Shaft Power	0.84–1.22 W
Power Density	1.846 W/in³ More power-dense than 53% of 482 Digital Mini servos
Torque Density	3.2333 oz-in/g Stronger than 77% of 286 Digital Mini servos
Torque-to-Volume Ratio	102.57 oz-in/in³ Denser torque than 69% of 288 Digital Mini servos
Speed-to-Weight	0.31746 (1/sec·g) Faster than 49% of 289 Digital Mini servos
Speed-Torque Trade-off	10.19 Better balanced than 70% of 288 Digital Mini servos
Torque Gain per Volt	13.99%/V More voltage-responsive (torque) than 35% of 257 Digital Mini servos
Speed Gain per Volt	20.83%/V More voltage-responsive (speed) than 79% of 262 Digital Mini servos
Voltage Range Width	1.2 V Wider voltage range than 28% of 405 Digital Mini servos