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Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | PTK 9840 MG-D |
| Category | Hobby |
| Performance | |
| Torque |
7.4V
458.28 oz-in
33.00 kg-cm
3.2 N-m
6.0V
388.85 oz-in
28.00 kg-cm
2.7 N-m
4.8V
333.30 oz-in
24.00 kg-cm
2.4 N-m
Above Average
|
| Speed |
7.4V
0.11 sec/60°
535.7 deg/s
89.3 RPM
6.0V
0.11 sec/60°
526.3 deg/s
87.7 RPM
4.8V
0.12 sec/60°
517.2 deg/s
86.2 RPM
Above Average
|
| Physical | |
| Weight | 2.47 oz70.0 gBelow Average |
| Dimensions |
L 1.59 in W 0.79 in H 1.43 in L 40.4 mm W 20.1 mm H 36.3 mm |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Titanium |
| Gear Spline/Teeth | 25 T estimate |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 90° |
| Pulse Width | 1000-2000 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Water Rating | IP67 |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 300 mm11.81 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 | Above Average Stronger than 74% of 1055 Digital Standard servos at 4.8V |
| Speed | Above Average Faster than 69% of 1038 Digital Standard servos at 4.8V |
| Weight | Below Average Lighter than 34% of 1872 Digital Standard servos |
Performance Analysis
| Shaft Power | 5.31–7.57 W |
| Power Density | 4.212 W/in³ More power-dense than 73% of 1762 Digital Standard servos |
| Torque Density | 4.7614 oz-in/g Stronger than 75% of 1048 Digital Standard servos |
| Torque-to-Volume Ratio | 185.56 oz-in/in³ Denser torque than 78% of 1053 Digital Standard servos |
| Speed-to-Weight | 0.12315 (1/sec·g) Faster than 57% of 1031 Digital Standard servos |
| Speed-Torque Trade-off | 38.67 Better balanced than 63% of 1029 Digital Standard servos |
| Voltage Range Width | 3.6 V Wider voltage range than 80% of 1552 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0020 Finer dead band than 24% of 501 Digital Standard servos |
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