Robbe FS-527+

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Technical Specifications

Last Updated: 2026-07-28

Identity
Brand
Product Number	9132
Category	Hobby
Performance
Torque	8.4V 372.25 oz-in 4.8V 326.42 oz-in Above Average
Speed	8.4V 0.14 sec/60° 4.8V 0.18 sec/60° Below Average
Physical
Weight	2.29 ozAverage
Dimensions	L 1.575 in W 0.807 in H 1.594 in
Case Material	Aluminum
Drivetrain
Gears	Metal
Gear Spline/Teeth	25 T
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Electrical & Environment
Operating Voltage	4.8–8.4 V
Connectivity
Connector	JR (Universal) estimate
Origin
Country of Origin	German

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Above Average Stronger than 72% of 1055 Digital Standard servos at 4.8V
Speed	Below Average Faster than 20% of 1038 Digital Standard servos at 4.8V
Weight	Average Lighter than 45% of 1872 Digital Standard servos

Performance Analysis

Shaft Power	3.35–4.92 W
Power Density	2.427 W/in³ More power-dense than 51% of 1762 Digital Standard servos
Torque Density	5.0219 oz-in/g Stronger than 78% of 1048 Digital Standard servos
Torque-to-Volume Ratio	161.11 oz-in/in³ Denser torque than 70% of 1053 Digital Standard servos
Speed-to-Weight	0.08547 (1/sec·g) Faster than 19% of 1031 Digital Standard servos
Speed-Torque Trade-off	58.76 Better balanced than 84% of 1029 Digital Standard servos
Torque Gain per Volt	3.90%/V More voltage-responsive (torque) than 1% of 868 Digital Standard servos
Speed Gain per Volt	7.94%/V More voltage-responsive (speed) than 8% of 868 Digital Standard servos
Voltage Range Width	3.6 V Wider voltage range than 83% of 1552 Digital Standard servos