Servo Specs, Reviews, & Comparison Tool
Cirrus CS-20BB - Sub-Micro Servo
Specifications
| Last Updated: | 2025-08-04 |
| Modulation: | (add) |
| Torque: |
4.8V: 14.00 oz-in (1.01 kg-cm) |
| Speed: |
4.8V: 0.09 sec/60° |
| Weight: | 0.32 oz (9.1 g) |
| Dimensions: |
Length:0.86 in (21.8 mm) Width:0.43 in (10.9 mm) Height:0.77 in (19.6 mm) |
| Motor Type: | (add) |
| Gear Type: | (add) |
| Rotation/Support: | Single Bearing |
| Rotational Range: | (add) |
| Pulse Cycle: | (add) |
| Pulse Width: | (add) |
| Connector Type: | (add) |
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Notes
- The discontinued Cirrus CS-20BB is a high-quality analog sub-micro servo that elevates the performance of the popular 9-gram class by incorporating a premium dual ball bearing (BB) supported output shaft. This feature is typically found on larger, more expensive servos and its inclusion here marks the CS-20BB as a superior choice for precision-oriented applications. It is designed for discerning pilots of high-performance park flyers, small electric gliders, and hand-launch gliders. The dual ball bearings provide an exceptionally smooth, rigid, and slop-free support for the output shaft, allowing for incredibly precise and repeatable control surface movements.
- The essence of the CS-20BB is its refined, high-fidelity performance. While other servos may offer more raw power or speed, the CS-20BB focuses on delivering that performance with the utmost accuracy and smoothness. The dual ball bearings virtually eliminate the friction and play that can lead to a vague control feel, giving the pilot a direct, one-to-one connection with their aircraft. This is critical for thermal soaring, where tiny, precise adjustments are needed, or for flying smooth, graceful aerobatic lines. The enhanced durability of the bearing setup also ensures this precision is maintained for a very long service life.
- For roboticists working on projects where accuracy is paramount, the CS-20BB is an outstanding tool. It is an ideal choice for building a small, highly stable camera gimbal or sensor platform. It would also excel in the joints of a small robotic arm where precise end-point positioning is a critical requirement. For any robotics task where slop, jitter, and inaccuracy cannot be tolerated, the dual ball bearing design of the CS-20BB provides a distinct and valuable advantage.
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