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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | RBS581 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V
216.60 oz-in
15.60 kg-cm
1.5 N-m
4.8V
177.00 oz-in
12.75 kg-cm
1.2 N-m
Average
|
| Speed |
6.0V
0.14 sec/60°
444.4 deg/s
74.1 RPM
4.8V
0.17 sec/60°
363.6 deg/s
60.6 RPM
Below Average
|
| Physical | |
| Weight | 1.48 oz42.0 gTop 10% |
| Dimensions |
L 1.50 in W 0.75 in H 1.57 in L 38.1 mm W 19.0 mm H 39.9 mm |
| Drivetrain | |
| Gears | Plastic |
| Gear Spline/Teeth | 23 T estimate |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Digital |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Connectivity | |
| Connector | JR (Universal) estimate |
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.
Class Comparison
| Torque | Average Stronger than 39% of 1043 Digital Standard servos at 4.8V |
| Speed | Below Average Faster than 28% of 1041 Digital Standard servos at 4.8V |
| Weight | Top 10% Lighter than 94% of 1902 Digital Standard servos |
Performance Analysis
| Shaft Power | 1.98–2.97 W |
| Power Density | 1.680 W/in³ More power-dense than 36% of 1759 Digital Standard servos |
| Torque Density | 4.2143 oz-in/g Stronger than 64% of 1036 Digital Standard servos |
| Torque-to-Volume Ratio | 100.21 oz-in/in³ Denser torque than 42% of 1042 Digital Standard servos |
| Speed-to-Weight | 0.14430 (1/sec·g) Faster than 68% of 1033 Digital Standard servos |
| Speed-Torque Trade-off | 29.21 Better balanced than 51% of 1031 Digital Standard servos |
| Torque Gain per Volt | 18.64%/V More voltage-responsive (torque) than 73% of 850 Digital Standard servos |
| Speed Gain per Volt | 18.52%/V More voltage-responsive (speed) than 71% of 871 Digital Standard servos |
| Voltage Range Width | 1.2 V Wider voltage range than 22% of 1539 Digital Standard servos |
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