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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | MAC5921HV |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
281.91 oz-in
20.30 kg-cm
2.0 N-m
6.0V
238.86 oz-in
17.20 kg-cm
1.7 N-m
Average
|
| Speed |
8.4V
0.12 sec/60°
500.0 deg/s
83.3 RPM
6.0V
0.15 sec/60°
400.0 deg/s
66.7 RPM
Average
|
| Running Current |
8.4V
0.820 A
820 mA
6.0V
0.550 A
550 mA
Below Average
|
| Physical | |
| Weight | 2.08 oz59.0 gAverage |
| Dimensions |
L 1.59 in W 0.79 in H 1.44 in L 40.4 mm W 20.1 mm H 36.6 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | Coreless |
| Motor Drive | MOS |
| Gears | Metal |
| Gear Spline/Teeth | 25 T |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 90° |
| Pulse Cycle | 3.03 ms |
| Pulse Width | 1000-2000 µs |
| Neutral Position | 1500 µs |
| Dead Band | 2 µs |
| Refresh Rate | 330 Hz |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Power Source | 2S LiPo |
| Temperature | -20–60 °C-4–140 °F |
| Water Rating | Waterproof |
| Idle Current | 0.580 A580 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 260 mm10.24 in |
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 53% of 1043 Digital Standard servos at 6.0V |
| Speed | Average Faster than 36% of 1041 Digital Standard servos at 6.0V |
| Weight | Average Lighter than 63% of 1902 Digital Standard servos |
| Running Current | Below Average Lower draw than 23% of 173 Digital Standard servos at 6.0V |
Performance Analysis
| Shaft Power | 2.94–4.34 W |
| Power Density | 2.402 W/in³ More power-dense than 50% of 1759 Digital Standard servos |
| Torque Density | 4.0485 oz-in/g Stronger than 62% of 1036 Digital Standard servos |
| Torque-to-Volume Ratio | 132.06 oz-in/in³ Denser torque than 57% of 1042 Digital Standard servos |
| Speed-to-Weight | 0.11299 (1/sec·g) Faster than 48% of 1033 Digital Standard servos |
| Speed-Torque Trade-off | 35.83 Better balanced than 59% of 1031 Digital Standard servos |
| Idle-to-Running Current Ratio | 1.055 Lower idle draw than 9% of 112 Digital Standard servos |
| Torque Gain per Volt | 7.51%/V More voltage-responsive (torque) than 10% of 850 Digital Standard servos |
| Speed Gain per Volt | 10.42%/V More voltage-responsive (speed) than 19% of 871 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 45% of 1539 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0020 Finer dead band than 23% of 468 Digital Standard servos |
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