Robbe FS 61 BB MG

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-07-28

Identity
Brand
Product Number	8523
Category	Hobby
Discontinued	Yes
Performance
Torque	4.8V28.30 oz-inAverage
Speed	4.8V0.16 sec/60°Below Average
Physical
Weight	0.32 ozAverage
Dimensions	L 0.91 in W 0.45 in H 0.80 in
Drivetrain
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 55% of 328 Digital Micro servos at 4.8V
Speed	Below Average Faster than 13% of 328 Digital Micro servos at 4.8V
Weight	Average Lighter than 63% of 620 Digital Micro servos

Performance Analysis

Shaft Power	0.33 W
Power Density	0.998 W/in³ More power-dense than 17% of 590 Digital Micro servos
Torque Density	3.1444 oz-in/g Stronger than 75% of 327 Digital Micro servos
Torque-to-Volume Ratio	86.39 oz-in/in³ Denser torque than 63% of 327 Digital Micro servos
Speed-to-Weight	0.69444 (1/sec·g) Faster than 45% of 327 Digital Micro servos
Speed-Torque Trade-off	4.53 Better balanced than 72% of 327 Digital Micro servos
Voltage Range Width	1.2 V Wider voltage range than 38% of 511 Digital Micro servos