Feetech FS90R continuous rotation servo
What are the dimensions of the Feetech FS90R continuous rotation servo? · Modern device · basis: Feetech FS90R datasheet (maker PDF, hosted by Pololu); Pololu spec table (secondary)
Also called: fs90r dimensions, fs90r size, feetech fs90r, fs90r, 360 servo dimensions, continuous rotation servo size, servo rotación continua, servo de rotação contínua, Servo Dauerrotation
Exact dimensions. True size, with no printing tolerance added.
- length
- 22.5 mm
- width
- 12.1 mm
- height
- 27.7 mm
Notes
- The Feetech FS90R is a 9 g, 360° continuous-rotation micro servo. Feetech's datasheet gives its size as A 22.5 mm, B 12.1 mm, C 27.7 mm, a 21-tooth (4.86 mm) output spline, a 250 mm lead and 4.8–6 V.
- Feetech does not say in text which axis C is; it is taken as the overall height, the larger of the two published third dimensions, so the envelope encloses the body either way. Pololu's 23.4 mm likely leaves out the shaft boss — check yours before cutting a tight pocket.
- The file is an envelope box 22.5 × 12.1 × 27.7 mm at the published size, true size, no printing allowance. Mounting ears, output shaft and lead are not modelled.
Feetech FS90R continuous rotation servo size chart
| dimension | value |
|---|---|
| A (body length) | 22.5 mm |
| B (body width) | 12.1 mm |
| C | 27.7 mm (datasheet); Pololu lists 23.4 mm |
| weight | 9 g ± 0.2 |
| output spline | 21 T (4.86 mm) |
| lead | 250 mm ± 5 (datasheet); Pololu 10 in |
| voltage | 4.8–6 V |
| pulse range / stop | 700–2300 µs / 1500 µs |
| stall torque | 1.3 kg·cm (4.8 V), 1.5 kg·cm (6 V) |
| no-load speed | 80 rpm (4.8 V), 100 rpm (6 V) |
| mounting-ear span and holes | on the datasheet drawing only (not in text) |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Feetech (via Pololu) | FS90R datasheet (PDF) | web | Publisher's page; dimensions are facts |
| Pololu (retailer) | FS90R specs | web | Publisher's page; dimensions are facts |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| feetech-fs90r-continuous-rotation-servo-envelope | An envelope box 22.5 × 12.1 × 27.7 mm (Mounting ears, output shaft and lead are not modelled) | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=feetech-fs90r-continuous-rotation-servo
Fits with


Questions
How big is the FS90R?
22.5 × 12.1 mm body; 27.7 mm third dimension on Feetech's datasheet (Pololu lists 23.4 mm). 9 g, 21-tooth spline.