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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | PDI-HV5921MG |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
282.24 oz-in
20.32 kg-cm
2.0 N-m
6.0V
239.60 oz-in
17.25 kg-cm
1.7 N-m
Average
|
| Speed |
8.4V
0.12 sec/60°
487.8 deg/s
81.3 RPM
6.0V
0.15 sec/60°
394.7 deg/s
65.8 RPM
Average
|
| Physical | |
| Weight | 2.09 oz59.3 gAverage |
| Dimensions |
L 1.594 in W 0.807 in H 1.437 in L 40.5 mm W 20.5 mm H 36.5 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Aluminum |
| Gear Spline/Teeth | 25 T |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Pulse Cycle | 3.03 ms |
| Dead Band | 1 µs |
| Refresh Rate | 330 Hz |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -10–55 °C14–131 °F |
| Water Rating | Waterproof |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 265 mm10.43 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 54% 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 |
Performance Analysis
| Shaft Power | 2.91–4.24 W |
| Power Density | 2.295 W/in³ More power-dense than 49% of 1759 Digital Standard servos |
| Torque Density | 4.0405 oz-in/g Stronger than 61% of 1036 Digital Standard servos |
| Torque-to-Volume Ratio | 129.62 oz-in/in³ Denser torque than 57% of 1042 Digital Standard servos |
| Speed-to-Weight | 0.11094 (1/sec·g) Faster than 46% of 1033 Digital Standard servos |
| Speed-Torque Trade-off | 36.42 Better balanced than 60% of 1031 Digital Standard servos |
| Torque Gain per Volt | 7.42%/V More voltage-responsive (torque) than 10% of 850 Digital Standard servos |
| Speed Gain per Volt | 9.83%/V More voltage-responsive (speed) than 17% of 871 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 51% of 1539 Digital Standard servos |
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