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Technical Specifications
Last Updated: 2026-09-13
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Identity
Performance
Physical
Drivetrain
Control & Signal
Electrical & Environment
Connectivity
Origin
Preferences are saved automatically.
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | FUTM0521 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
4.8V53.00 oz-in3.82 kg-cm0.4 N-m |
| Speed |
4.8V0.06 sec/60°1,000.0 deg/s166.7 RPM |
| Running Current | (add) |
| Stall Current | (add) |
| Physical | |
| Weight | 2.10 oz59.5 g |
| Dimensions |
L 1.57 in W 0.79 in H 1.45 in L 39.9 mm W 20.1 mm H 36.8 mm |
| Case Material | Plastic / Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Motor Drive | (add) |
| Gears | Metal |
| Gear Spline/Teeth | 21 T estimate |
| Shaft Size | (add) |
| Rotation Mode | (add) |
| Rotation/Support | Dual Bearings |
| Backlash | (add) |
| Control & Signal | |
| Modulation | Digital |
| Direction | (add) |
| Rotational Range | (add) |
| Mechanical Limit | (add) |
| Pulse Cycle | (add) |
| Pulse Width | (add) |
| Neutral Position | 760 µs |
| Dead Band | (add) |
| Refresh Rate | 560 Hz |
| Angle Sensor | (add) |
| Control System | PWM |
| Programmable | (add) |
| Signal Voltage | (add) |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Power Source | (add) |
| Regulator Type | (add) |
| Temperature | (add) |
| Water Rating | (add) |
| Certification | (add) |
| Idle Current | (add) |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | (add) |
| Origin | |
| Country of Origin | (add) |
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.
Performance Analysis
| Shaft Power | 1.63 W |
| Torque Density | 0.8908 oz-in/g Stronger than 3% of the 832 Digital Standard servos in the database |
| Torque-to-Volume Ratio | 29.47 oz-in/in³ Denser torque than 5% of the 843 Digital Standard servos in the database |
| Power Density | 0.908 W/in³ More power-dense than 16% of the 1644 Digital Standard servos in the database |
| Speed-to-Weight | 0.28011 (1/sec·g) Faster than 91% of the 821 Digital Standard servos in the database |
| Speed-Torque Trade-off | 3.18 Better balanced than 5% of the 826 Digital Standard servos in the database |
| Voltage Range Width | 1.2 V Wider voltage range than 24% of the 1269 Digital Standard servos in the database |
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Reviews (2)
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silcom69
September 23, 2023Application(s): Tail rotor 700 heli - TDR Henseleit
Comments: Robust, precise and reliable.
Logos1
June 20, 2012Application(s): Tailrotor 600heli (Mikado Logo)
Comments: An outstanding servo! Sollid as a rock!