Servo Specs, Reviews, & Comparison Tool
Expert SL661 - Hi Speed Low Profile Servo
Specifications
| Last Updated: | 2025-08-06 |
| Modulation: | (add) |
| Torque: |
4.8V: 40.20 oz-in (2.89 kg-cm) |
| Speed: |
4.8V: 0.15 sec/60° |
| Weight: | 1.08 oz (30.5 g) |
| Dimensions: |
Length:1.74 in (44.2 mm) Width:0.88 in (22.4 mm) Height:0.92 in (23.4 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 Expert SL661 is a top-tier digital servo that leverages a high-performance coreless motor to deliver an exceptionally fast and smooth response. This standard-sized servo is designed for the most demanding competitive applications where a high-fidelity control feel is paramount. It is an outstanding choice for the cyclic controls on a 500 or 600-class 3D helicopter, where its blend of digital precision and coreless smoothness provides a very connected and responsive feel. It is also a favorite among top-level car racers for steering, as its smooth, immediate response allows for more precise and consistent driving.
- The defining characteristic of the SL661 is its refined, high-speed performance. The coreless motor provides a level of smoothness and instantaneous acceleration that is a clear step above conventional motors. The digital controller harnesses this performance with pinpoint accuracy and incredible holding power. The result is a servo that feels both incredibly fast and exquisitely smooth, allowing the user to perform with a higher degree of finesse and accuracy.
- For roboticists building advanced systems, the Expert SL661 is a premium actuator. It is ideal for applications that require very smooth, fast, and precise motion, such as a professional-grade camera gimbal for cinematic use, or for the joints of a high-speed collaborative robot ("cobot"). For any project where the quality of motion is a key performance metric, the SL661 offers a superior, professional-level solution."
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