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Technical Specifications
Last Updated: 2026-07-10
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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 | 7904 |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
13.89 oz-in
1.00 kg-cm
0.1 N-m
4.8V
11.11 oz-in
0.80 kg-cm
0.1 N-m
|
| Speed |
6.0V
0.06 sec/60°
1,000.0 deg/s
166.7 RPM
4.8V
0.07 sec/60°
857.1 deg/s
142.9 RPM
|
| Running Current | (add) |
| Stall Current | (add) |
| Physical | |
| Weight | 0.28 oz8.0 g |
| Dimensions |
L 0.85 in W 0.43 in H 0.83 in L 21.5 mm W 11.0 mm H 21.0 mm |
| Case Material | (add) |
| Drivetrain | |
| Motor Type | Brushed |
| Motor Drive | (add) |
| Gears | Karbonite |
| Gear Spline/Teeth | (add) |
| Shaft Size | (add) |
| Rotation Mode | (add) |
| Rotation/Support | Single Bearing |
| Backlash | (add) |
| Control & Signal | |
| Modulation | Digital |
| Direction | (add) |
| Rotational Range | (add) |
| Mechanical Limit | (add) |
| Pulse Cycle | 3000 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 | 4.8–6 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 | 0.29–0.43 W |
| Torque Density | 1.3888 oz-in/g Stronger than 8% of the 240 Digital Micro servos in the database |
| Torque-to-Volume Ratio | 36.65 oz-in/in³ Denser torque than 9% of the 242 Digital Micro servos in the database |
| Power Density | 1.412 W/in³ More power-dense than 36% of the 544 Digital Micro servos in the database |
| Speed-to-Weight | 1.78571 (1/sec·g) Faster than 90% of the 240 Digital Micro servos in the database |
| Speed-Torque Trade-off | 0.78 Better balanced than 5% of the 242 Digital Micro servos in the database |
| Torque Gain per Volt | 20.85%/V More voltage-responsive (torque) than 77% of the 194 Digital Micro servos in the database |
| Speed Gain per Volt | 13.89%/V More voltage-responsive (speed) than 29% of the 196 Digital Micro servos in the database |
| Voltage Range Width | 1.2 V Wider voltage range than 26% of the 407 Digital Micro servos in the database |
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