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Technical Specifications
Last Updated: 2026-10-21
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | PTK-7308 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
48.60 oz-in
3.50 kg-cm
0.3 N-m
6.0V
41.66 oz-in
3.00 kg-cm
0.3 N-m
3.8V
36.11 oz-in
2.60 kg-cm
0.3 N-m
Above Average
|
| Speed |
8.4V
0.07 sec/60°
923.1 deg/s
153.8 RPM
6.0V
0.08 sec/60°
722.9 deg/s
120.5 RPM
3.8V
0.18 sec/60°
342.9 deg/s
57.1 RPM
Below Average
|
| Physical | |
| Weight | 0.28 oz8.0 gAbove Average |
| Dimensions |
L 0.93 in W 0.661 in H 0.315 in L 23.6 mm W 16.8 mm H 8.0 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Aluminum |
| Gear Spline/Teeth | 15 T estimate |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 180° |
| Pulse Width | 500-2500 µs |
| Dead Band | 3 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Potentiometer |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 3.8–8.4 V |
| Temperature | -20–60 °C-4–140 °F |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 200 mm7.87 in |
| Origin | |
| Country of Origin | China |
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 67% of 363 Digital Micro servos at 3.8V |
| Speed | Below Average Faster than 10% of 361 Digital Micro servos at 3.8V |
| Weight | Above Average Lighter than 70% of 665 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.38–1.38 W |
| Power Density | 7.140 W/in³ More power-dense than 90% of 625 Digital Micro servos |
| Torque Density | 4.5138 oz-in/g Stronger than 91% of 363 Digital Micro servos |
| Torque-to-Volume Ratio | 186.48 oz-in/in³ Denser torque than 91% of 359 Digital Micro servos |
| Speed-to-Weight | 0.71429 (1/sec·g) Faster than 53% of 361 Digital Micro servos |
| Speed-Torque Trade-off | 6.32 Better balanced than 76% of 358 Digital Micro servos |
| Torque Gain per Volt | 7.52%/V More voltage-responsive (torque) than 4% of 302 Digital Micro servos |
| Speed Gain per Volt | 36.78%/V More voltage-responsive (speed) than 97% of 305 Digital Micro servos |
| Voltage Range Width | 4.6 V Wider voltage range than 92% of 553 Digital Micro servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0015 Finer dead band than 48% of 220 Digital Micro servos |
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Reviews (1)
Includes 1 review aggregated from around the web.
There are very few reviews for this servo on the web. A German forum thread on PTK servos reports a very good first impression on build quality and bench testing, and another user says two PTK 9g servos have run unnoticed in a slope glider.
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