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Technical Specifications
Last Updated: 2026-10-27
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | SPMS905 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
7.2V
555.50 oz-in
40.00 kg-cm
3.9 N-m
6.0V
537.72 oz-in
38.72 kg-cm
3.8 N-m
Top 10%
|
| Speed |
7.2V
0.18 sec/60°
333.3 deg/s
55.6 RPM
6.0V
0.20 sec/60°
300.0 deg/s
50.0 RPM
Bottom 10%
|
| Physical | |
| Weight | 2.72 oz77.1 gBelow Average |
| Dimensions |
L 2.34 in W 1.54 in H 2.17 in L 59.4 mm W 39.1 mm H 55.1 mm |
| Drivetrain | |
| Motor Type | DC |
| Gears | Metal |
| Gear Spline/Teeth | 15 T |
| Control & Signal | |
| Modulation | Digital |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Water Rating | Waterproof |
| 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 | Top 10% Stronger than 94% of 1060 Digital Standard servos at 6.0V |
| Speed | Bottom 10% Faster than 10% of 1045 Digital Standard servos at 6.0V |
| Weight | Below Average Lighter than 17% of 1880 Digital Standard servos |
Performance Analysis
| Shaft Power | 4.97–5.71 W |
| Power Density | 0.730 W/in³ More power-dense than 10% of 1768 Digital Standard servos |
| Torque Density | 6.9733 oz-in/g Stronger than 93% of 1053 Digital Standard servos |
| Torque-to-Volume Ratio | 68.76 oz-in/in³ Denser torque than 25% of 1058 Digital Standard servos |
| Speed-to-Weight | 0.06484 (1/sec·g) Faster than 4% of 1038 Digital Standard servos |
| Speed-Torque Trade-off | 107.54 Better balanced than 97% of 1034 Digital Standard servos |
| Voltage Range Width | 2.4 V Wider voltage range than 56% of 1560 Digital Standard servos |
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Reviews (6)
Includes 6 reviews aggregated from around the web.
There are very few reviews for this servo on the web. One Reddit owner reports that the servo gears came apart on both an 8S Kraton and an Outcast after about 2.5 years and only around 6 hours of driving.
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