Discover XQ-Power Servos in Our eBay Store!
Shop Now
Technical Specifications
Last Updated: 2026-10-24
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
0.580 A
580 mA
6.0V
0.390 A
390 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 | Metal |
| Drivetrain | |
| Motor Type | Coreless |
| Motor Drive | MOS |
| Gears | Metal |
| Gear Spline/Teeth | 25 T |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 60° |
| Pulse Cycle | 3.03 ms |
| Pulse Width | 1000-2000 µs |
| Neutral Position | 1500 µs |
| Dead Band | 1 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 55% of 1060 Digital Standard servos at 6.0V |
| Speed | Average Faster than 38% of 1045 Digital Standard servos at 6.0V |
| Weight | Average Lighter than 64% of 1880 Digital Standard servos |
| Running Current | Below Average Lower draw than 26% of 226 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 1768 Digital Standard servos |
| Torque Density | 4.0485 oz-in/g Stronger than 63% of 1053 Digital Standard servos |
| Torque-to-Volume Ratio | 132.06 oz-in/in³ Denser torque than 59% of 1058 Digital Standard servos |
| Speed-to-Weight | 0.11299 (1/sec·g) Faster than 49% of 1038 Digital Standard servos |
| Speed-Torque Trade-off | 35.83 Better balanced than 59% of 1034 Digital Standard servos |
| Idle-to-Running Current Ratio | 1.487 Lower idle draw than 0% of 167 Digital Standard servos |
| Torque Gain per Volt | 7.51%/V More voltage-responsive (torque) than 9% of 873 Digital Standard servos |
| Speed Gain per Volt | 10.42%/V More voltage-responsive (speed) than 19% of 874 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 45% of 1560 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 65% of 504 Digital Standard servos |
Similar Active Servos
Reviews (1)
Includes 1 review aggregated from around the web.
There are very few reviews for this servo on the web. The one buyer who reviewed it replaced the steering servo in an Arrma Outcast and says it is faster and stronger than stock and makes the truck feel like a different car to drive.
Be the first to review!