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ROBOTIS Dynamixel AX-12A servo: 32 × 50 mm body, horn holes and frame-mount holes
What are the Dynamixel AX-12A dimensions, horn and frame-mount hole positions? · Modern device · basis: ROBOTIS e-Manual AX-12A dimension drawing.
Also called: ROBOTIS Dynamixel AX-12A, AX-12A, dynamixel ax12a, ax-12a dimensions, ax-12a horn holes, dynamixel ax-12 servo
Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features
- length
- 50.0 mm
- width
- 37.0 mm
- height
- 32.0 mm
Notes
- Datum: bottom on z=0, centred on X, body y=−16..+16; horn on the −Y face, its axis at z=38.5 (11.5 below the top).
- Body 32 × 32 × 50; horn Ø22 standing 5 proud of the front face (modelled depth 37).
- Horn: 4 × M2 tapped holes on a Ø16 circle, modelled as Ø1.6 × 4.0 deep.
- Frame holes for M2 bolts (modelled Ø2.2 × 5.0, front face): two columns 27 apart at z=32, 24, 16, 8 (8 pitch), plus a pair 16 apart at z=2.5.
- Not modelled: the narrowing of the upper body to 26 wide, the 3 mm front boss and the rear hinge bosses (overall depth 40 with them).
- Exact nominal mm.
ROBOTIS Dynamixel AX-12A servo: 32 × 50 mm body, horn holes and… size chart
| holes | x (mm) | z (mm) | size |
|---|---|---|---|
| horn | 0 / ±8 | 46.5, 30.5 / 38.5 | 4 × M2 on Ø16 |
| frame columns | ±13.5 | 32, 24, 16, 8 | 8 × M2 |
| frame bottom pair | ±8 | 2.5 | 2 × M2 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| Horn | Ø22, 4 × M2 on Ø16 circle | horn-mounted bracket or link | designed | all |
| Frame holes | M2, columns 27 apart, 8 pitch | ROBOTIS frame or custom side bracket | designed | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| ROBOTIS | AX-12/AX-12A e-Manual | web | Publisher's page; dimensions are facts |
| ROBOTIS (GitHub) | AX-12A dimension drawing | 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
| robotis-dynamixel-ax-12a | ROBOTIS Dynamixel AX-12A servo: 32 × 50 mm body, horn holes and frame-mount holes | 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=robotis-dynamixel-ax-12a

Fits with





Questions
How big is the AX-12A?
32 × 50 mm body, 32 mm deep plus a 5 mm horn; 40 mm overall depth including rear bosses.
What are the horn holes?
Four M2 tapped holes on a Ø16 mm circle around the horn axis, 11.5 mm below the top.
What is the side frame-hole pattern?
M2 holes in two columns 27 mm apart at 8 mm pitch, plus a bottom pair 16 mm apart.