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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | SPMS904 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V250.00 oz-in18.00 kg-cm1.8 N-mBottom 10% |
| Speed |
6.0V0.22 sec/60°277.8 deg/s46.3 RPMBelow Average |
| Physical | |
| Dimensions |
L 2.33 in W 1.14 in H 2.16 in L 59.2 mm W 29.0 mm H 54.9 mm |
| Case Material | Plastic |
| Drivetrain | |
| Gears | Metal |
| Gear Spline/Teeth | 15 T |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 120° |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 6–6 V |
| Water Rating | Waterproof |
| Connectivity | |
| Connector | JR (Universal) estimate |
| 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 | Bottom 10% Stronger than 3% of 88 Digital Giant servos at 6.0V |
| Speed | Below Average Faster than 32% of 89 Digital Giant servos at 6.0V |
Performance Analysis
| Shaft Power | 2.14 W |
| Power Density | 0.373 W/in³ More power-dense than 4% of 136 Digital Giant servos |
| Torque-to-Volume Ratio | 43.57 oz-in/in³ Denser torque than 6% of 88 Digital Giant servos |
| Speed-Torque Trade-off | 54.00 Better balanced than 10% of 85 Digital Giant servos |
| Voltage Range Width | 0.0 V Wider voltage range than 5% of 160 Digital Giant servos |
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