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Technical Specifications
Last Updated: 2026-07-10
|
Identity
Performance
Physical
Drivetrain
Control & Signal
Electrical & Environment
Connectivity
Origin
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Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | 7990 |
| Category | Hobby |
| Performance | |
| Torque |
7.4V
208.33 oz-in
15.00 kg-cm
1.5 N-m
6.0V
183.33 oz-in
13.20 kg-cm
1.3 N-m
4.8V
138.89 oz-in
10.00 kg-cm
1.0 N-m
|
| Speed |
7.4V
0.14 sec/60°
428.6 deg/s
71.4 RPM
6.0V
0.17 sec/60°
352.9 deg/s
58.8 RPM
4.8V
0.20 sec/60°
300.0 deg/s
50.0 RPM
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| Running Current | (add) |
| Stall Current | (add) |
| Physical | |
| Weight | 2.40 oz68.0 g |
| Dimensions |
L 1.57 in W 0.79 in H 1.57 in L 40.0 mm W 20.0 mm H 40.0 mm |
| Case Material | (add) |
| Drivetrain | |
| Motor Type | Brushless |
| Motor Drive | (add) |
| Gears | Steel |
| Gear Spline/Teeth | (add) |
| Shaft Size | (add) |
| Rotation Mode | (add) |
| Rotation/Support | Dual Bearings |
| Backlash | (add) |
| Control & Signal | |
| Modulation | Digital |
| Direction | (add) |
| Rotational Range | (add) |
| Mechanical Limit | (add) |
| Pulse Cycle | 2500 ms |
| Pulse Width | (add) |
| Neutral Position | 1500 µs |
| Dead Band | (add) |
| Refresh Rate | (add) |
| Angle Sensor | (add) |
| Control System | PWM |
| Programmable | (add) |
| Signal Voltage | (add) |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Power Source | (add) |
| Regulator Type | (add) |
| Temperature | (add) |
| Water Rating | (add) |
| Certification | (add) |
| Idle Current | (add) |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | (add) |
| Origin | |
| Country of Origin | (add) |
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.
Performance Analysis
| Shaft Power | 1.28–2.75 W |
| Torque Density | 2.0425 oz-in/g Stronger than 26% of the 831 Digital Standard servos in the database |
| Torque-to-Volume Ratio | 71.13 oz-in/in³ Denser torque than 29% of the 842 Digital Standard servos in the database |
| Power Density | 1.409 W/in³ More power-dense than 30% of the 1643 Digital Standard servos in the database |
| Speed-to-Weight | 0.07353 (1/sec·g) Faster than 8% of the 820 Digital Standard servos in the database |
| Speed-Torque Trade-off | 27.78 Better balanced than 51% of the 825 Digital Standard servos in the database |
| Voltage Range Width | 3.6 V Wider voltage range than 86% of the 1268 Digital Standard servos in the database |
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