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Technical Specifications
Last Updated: 2026-07-28
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | SR121 |
| Category | Robotics |
| Performance | |
| Torque |
6.0V
15.28 oz-in
1.10 kg-cm
0.1 N-m
4.8V
12.50 oz-in
0.90 kg-cm
0.1 N-m
|
| Speed |
6.0V
0.09 sec/60°
666.7 deg/s
111.1 RPM
4.8V
0.12 sec/60°
500.0 deg/s
83.3 RPM
|
| Physical | |
| Weight | 0.28 oz8.0 gTop 10% |
| Shape | Boxed |
| Dimensions |
L 0.79 in W 0.32 in H 0.82 in L 20.1 mm W 8.1 mm H 20.8 mm |
| Control & Signal | |
| Rotational Range | 90° |
| 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
| Weight | Top 10% Lighter than 100% of 119 Slim servos |
Performance Analysis
| Shaft Power | 0.19–0.31 W |
| Power Density | 1.514 W/in³ More power-dense than 82% of 97 SpringRC servos |
| Torque Density | 1.5625 oz-in/g |
| Torque-to-Volume Ratio | 60.30 oz-in/in³ |
| Speed-to-Weight | 1.04167 (1/sec·g) |
| Speed-Torque Trade-off | 1.50 |
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