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Technical Specifications
Last Updated: 2026-11-04
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | A66FHLW |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
834.00 oz-in
60.05 kg-cm
5.9 N-m
7.4V
736.00 oz-in
53.00 kg-cm
5.2 N-m
6.0V
639.00 oz-in
46.01 kg-cm
4.5 N-m
4.8V
569.00 oz-in
40.97 kg-cm
4.0 N-m
Top 10%
|
| Speed |
8.4V
0.10 sec/60°
600.0 deg/s
100.0 RPM
7.4V
0.12 sec/60°
521.7 deg/s
87.0 RPM
6.0V
0.13 sec/60°
454.5 deg/s
75.8 RPM
4.8V
0.15 sec/60°
413.8 deg/s
69.0 RPM
Bottom 10%
|
| Running Current |
8.4V
0.580 A
580 mA
7.4V
0.540 A
540 mA
6.0V
0.500 A
500 mA
4.8V
0.460 A
460 mA
Below Average
|
| Stall Current | 5.4–7.5 A5400–7500 mABottom 10% |
| Physical | |
| Weight | 2.67 oz75.8 gBottom 10% |
| Dimensions |
L 1.61 in W 0.80 in H 1.16 in L 40.9 mm W 20.3 mm H 29.5 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Motor Drive | FET |
| Gears | Titanium / Steel |
| Gear Spline/Teeth | 25 T |
| Shaft Size | 5.9 mm |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 180° |
| Mechanical Limit | No Limit |
| Pulse Cycle | 3 ms |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1520 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Hall Effect |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Temperature | -15–70 °C5–158 °F |
| Water Rating | IP67 |
| Certification | CE | ROHS | FCC |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 300 mm11.81 in |
| Origin | |
| Country of Origin | China |
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 | Top 10% Stronger than 98% of 186 Digital Low Profile servos at 4.8V |
| Speed | Bottom 10% Faster than 9% of 183 Digital Low Profile servos at 4.8V |
| Weight | Bottom 10% Lighter than 1% of 304 Digital Low Profile servos |
| Running Current | Below Average Lower draw than 19% of 27 Digital Low Profile servos at 4.8V |
| Stall Current | Bottom 10% Lower draw than 4% of 81 Digital Low Profile servos |
Performance Analysis
| Shaft Power | 7.26–15.42 W |
| Power Density | 10.321 W/in³ More power-dense than 94% of 273 Digital Low Profile servos |
| Torque Density | 7.5066 oz-in/g Stronger than 97% of 185 Digital Low Profile servos |
| Torque-to-Volume Ratio | 380.84 oz-in/in³ 4th-highest torque-to-volume ratio of 186 Digital Low Profile servos |
| Speed-to-Weight | 0.09098 (1/sec·g) Faster than 3% of 182 Digital Low Profile servos |
| Speed-Torque Trade-off | 82.50 4th-highest speed-torque trade-off of 183 Digital Low Profile servos |
| Current-per-Torque Ratio | 0.0132 A/oz-in More efficient than 82% of 58 Digital Low Profile servos |
| No-Load vs Stall Current Spread | 16.30 Narrower current spread than 63% of 20 Low Profile servos |
| Torque Gain per Volt | 12.94%/V More voltage-responsive (torque) than 30% of 164 Digital Low Profile servos |
| Speed Gain per Volt | 12.50%/V More voltage-responsive (speed) than 37% of 163 Digital Low Profile servos |
| Voltage Range Width | 3.6 V Wider voltage range than 81% of 276 Digital Low Profile servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 82% of 79 Digital Low Profile servos |
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