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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | CS-21BB |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
4.8V23.00 oz-in1.66 kg-cm0.2 N-m |
| Speed |
4.8V0.08 sec/60°750.0 deg/s125.0 RPM |
| Physical | |
| Weight | 0.32 oz9.1 gAverage |
| Dimensions |
L 0.86 in W 0.43 in H 0.77 in L 21.8 mm W 10.9 mm H 19.6 mm |
| Drivetrain | |
| Gear Spline/Teeth | 25 T estimate |
| Rotation/Support | Single Bearing |
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 | Average Lighter than 49% of 1074 Micro servos |
Performance Analysis
| Shaft Power | 0.53 W |
| Power Density | 1.867 W/in³ 5th-highest power density of 64 Cirrus servos |
| Torque Density | 2.5358 oz-in/g |
| Torque-to-Volume Ratio | 80.77 oz-in/in³ |
| Speed-to-Weight | 1.37817 (1/sec·g) |
| Speed-Torque Trade-off | 1.84 |
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