Robbe FS 61 BB

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-09

Identity
Brand
Product Number	8519
Category	Hobby
Discontinued	Yes
Performance
Torque	4.8V21.24 oz-inBelow Average
Speed	4.8V0.11 sec/60°Average
Physical
Weight	0.32 ozAverage
Dimensions	L 0.91 in W 0.45 in H 0.80 in
Drivetrain
Gear Spline/Teeth	25 T estimate
Rotation/Support	Single Bearing
Control & Signal
Modulation	Digital
Rotational Range	155°
Neutral Position	1500 µs
Refresh Rate	333 Hz
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	Below Average Stronger than 31% of 328 Digital Micro servos at 4.8V
Speed	Average Faster than 55% of 328 Digital Micro servos at 4.8V
Weight	Average Lighter than 58% of 620 Digital Micro servos

Performance Analysis

Shaft Power	0.37 W
Power Density	1.120 W/in³ More power-dense than 22% of 590 Digital Micro servos
Torque Density	2.3341 oz-in/g Stronger than 48% of 327 Digital Micro servos
Torque-to-Volume Ratio	64.84 oz-in/in³ Denser torque than 38% of 327 Digital Micro servos
Speed-to-Weight	1.02701 (1/sec·g) Faster than 73% of 327 Digital Micro servos
Speed-Torque Trade-off	2.27 Better balanced than 33% of 327 Digital Micro servos
Voltage Range Width	1.2 V Wider voltage range than 38% of 511 Digital Micro servos