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Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | 7921 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V
48.10 oz-in
3.46 kg-cm
0.3 N-m
4.8V
43.90 oz-in
3.16 kg-cm
0.3 N-m
Above Average
|
| Speed |
6.0V
0.11 sec/60°
571.4 deg/s
95.2 RPM
4.8V
0.14 sec/60°
444.4 deg/s
74.1 RPM
Below Average
|
| Physical | |
| Weight | 0.63 oz18.0 gBelow Average |
| Dimensions |
L 1.16 in W 0.47 in H 1.16 in L 29.5 mm W 11.9 mm H 29.5 mm |
| Drivetrain | |
| Gears | Karbonite |
| Gear Spline/Teeth | 23 T estimate |
| Rotation/Support | Bushing |
| Control & Signal | |
| Modulation | Digital |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 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 | Above Average Stronger than 78% of 349 Digital Micro servos at 4.8V |
| Speed | Below Average Faster than 26% of 347 Digital Micro servos at 4.8V |
| Weight | Below Average Lighter than 20% of 597 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.60–0.85 W |
| Power Density | 1.339 W/in³ More power-dense than 32% of 563 Digital Micro servos |
| Torque Density | 2.4389 oz-in/g Stronger than 50% of 349 Digital Micro servos |
| Torque-to-Volume Ratio | 69.41 oz-in/in³ Denser torque than 43% of 345 Digital Micro servos |
| Speed-to-Weight | 0.41152 (1/sec·g) Faster than 10% of 347 Digital Micro servos |
| Speed-Torque Trade-off | 5.93 Better balanced than 77% of 345 Digital Micro servos |
| Torque Gain per Volt | 7.97%/V More voltage-responsive (torque) than 7% of 290 Digital Micro servos |
| Speed Gain per Volt | 23.81%/V More voltage-responsive (speed) than 80% of 295 Digital Micro servos |
| Voltage Range Width | 1.2 V Wider voltage range than 43% of 496 Digital Micro servos |
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