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Technical Specifications
Last Updated: 2026-10-23
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | 8520 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
4.8V7.79 oz-in0.56 kg-cm0.1 N-mBottom 10% |
| Speed |
4.8V0.09 sec/60°643.1 deg/s107.2 RPMAbove Average |
| Physical | |
| Weight | 0.31 oz8.9 gAbove Average |
| Dimensions |
L 0.91 in W 0.45 in H 0.803 in L 23.1 mm W 11.4 mm H 20.4 mm |
| Drivetrain | |
| Gears | Carbon |
| Gear Spline/Teeth | 25 T estimate |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Digital |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 4.8–5.1 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 | Bottom 10% Stronger than 3% of 363 Digital Micro servos at 4.8V |
| Speed | Above Average Faster than 70% of 361 Digital Micro servos at 4.8V |
| Weight | Above Average Lighter than 66% of 665 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.15 W |
| Power Density | 0.470 W/in³ More power-dense than 3% of 625 Digital Micro servos |
| Torque Density | 0.8753 oz-in/g Stronger than 2% of 363 Digital Micro servos |
| Torque-to-Volume Ratio | 23.69 oz-in/in³ Denser torque than 3% of 359 Digital Micro servos |
| Speed-to-Weight | 1.20428 (1/sec·g) Faster than 79% of 361 Digital Micro servos |
| Speed-Torque Trade-off | 0.73 Better balanced than 4% of 358 Digital Micro servos |
| Voltage Range Width | 0.3 V Wider voltage range than 2% of 553 Digital Micro servos |
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Reviews (1)
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chopstick
January 17, 2010Application(s): this servo workes fine on my 450-size heli and a Spartan DS760-gyro.all with anSpektrum DX7 TX and AR6110 RX
Comments: Specially designd for 450-sized helicopters