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Technical Specifications
Last Updated: 2026-10-09
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | JR77438 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
41.70 oz-in
3.00 kg-cm
0.3 N-m
7.0V
34.70 oz-in
2.50 kg-cm
0.2 N-m
6.0V
28.80 oz-in
2.07 kg-cm
0.2 N-m
5.0V
24.80 oz-in
1.79 kg-cm
0.2 N-m
Average
|
| Speed |
8.4V
0.08 sec/60°
750.0 deg/s
125.0 RPM
7.0V
0.09 sec/60°
666.7 deg/s
111.1 RPM
6.0V
0.11 sec/60°
545.5 deg/s
90.9 RPM
5.0V
0.13 sec/60°
461.5 deg/s
76.9 RPM
Below Average
|
| Physical | |
| Weight | 0.35 oz10.0 gAverage |
| Dimensions |
L 0.906 in W 0.472 in H 0.866 in L 23.0 mm W 12.0 mm H 22.0 mm |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Hybrid |
| Control & Signal | |
| Modulation | Digital |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 5–8.4 V |
| Connectivity | |
| Connector | JR (Universal) estimate |
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 38% of 328 Digital Micro servos at 5.0V |
| Speed | Below Average Faster than 31% of 328 Digital Micro servos at 5.0V |
| Weight | Average Lighter than 51% of 620 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.35–0.96 W |
| Power Density | 2.601 W/in³ More power-dense than 59% of 590 Digital Micro servos |
| Torque Density | 2.4800 oz-in/g Stronger than 52% of 327 Digital Micro servos |
| Torque-to-Volume Ratio | 66.94 oz-in/in³ Denser torque than 41% of 327 Digital Micro servos |
| Speed-to-Weight | 0.76923 (1/sec·g) Faster than 55% of 327 Digital Micro servos |
| Speed-Torque Trade-off | 3.22 Better balanced than 49% of 327 Digital Micro servos |
| Torque Gain per Volt | 20.04%/V More voltage-responsive (torque) than 68% of 268 Digital Micro servos |
| Speed Gain per Volt | 18.39%/V More voltage-responsive (speed) than 57% of 273 Digital Micro servos |
| Voltage Range Width | 3.4 V Wider voltage range than 77% of 511 Digital Micro servos |
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