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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | SPMSA4040 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
8.4V
96.00 oz-in
6.91 kg-cm
0.7 N-m
7.4V
91.00 oz-in
6.55 kg-cm
0.6 N-m
6.0V
84.00 oz-in
6.05 kg-cm
0.6 N-m
|
| Speed |
8.4V
0.10 sec/60°
600.0 deg/s
100.0 RPM
7.4V
0.12 sec/60°
500.0 deg/s
83.3 RPM
6.0V
0.16 sec/60°
375.0 deg/s
62.5 RPM
|
| Physical | |
| Weight | 0.92 oz26.0 gBottom 10% |
| Dimensions |
L 1.10 in W 0.54 in H 1.23 in L 27.9 mm W 13.7 mm H 31.2 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless Brushed |
| Gears | Metal |
| Gear Spline/Teeth | 23 T |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Digital |
| Dead Band | 1 µs |
| Control System | PWM |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Connectivity | |
| Connector | JR (Universal) |
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
| Weight | Bottom 10% Lighter than 3% of 665 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.97–1.78 W |
| Power Density | 2.429 W/in³ More power-dense than 59% of 625 Digital Micro servos |
| Torque Density | 3.2308 oz-in/g |
| Torque-to-Volume Ratio | 114.97 oz-in/in³ |
| Speed-to-Weight | 0.24039 (1/sec·g) |
| Speed-Torque Trade-off | 13.44 |
| Voltage Range Width | 3.6 V Wider voltage range than 88% of 553 Digital Micro servos |
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Reviews (1)
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