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Technical Specifications
Last Updated: 2026-10-10
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
Below 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
Average
|
| Physical | |
| Weight | 0.63 oz18.0 gAbove 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 | Plastic |
| 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 | Below Average Stronger than 31% of 262 Digital Mini servos at 4.8V |
| Speed | Average Faster than 36% of 263 Digital Mini servos at 4.8V |
| Weight | Above Average Lighter than 82% of 466 Digital Mini servos |
Performance Analysis
| Shaft Power | 0.60–0.85 W |
| Power Density | 1.339 W/in³ More power-dense than 37% of 440 Digital Mini servos |
| Torque Density | 2.4389 oz-in/g Stronger than 53% of 258 Digital Mini servos |
| Torque-to-Volume Ratio | 69.41 oz-in/in³ Denser torque than 41% of 262 Digital Mini servos |
| Speed-to-Weight | 0.41152 (1/sec·g) Faster than 64% of 259 Digital Mini servos |
| Speed-Torque Trade-off | 5.93 Better balanced than 35% of 261 Digital Mini servos |
| Torque Gain per Volt | 7.97%/V More voltage-responsive (torque) than 3% of 232 Digital Mini servos |
| Speed Gain per Volt | 23.81%/V More voltage-responsive (speed) than 91% of 235 Digital Mini servos |
| Voltage Range Width | 1.2 V Wider voltage range than 37% of 351 Digital Mini servos |
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