ROBOTIS Dynamixel AX-12A servo: 32 × 50 mm body, horn holes and frame-mount holes — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/robotis-dynamixel-ax-12a/  (sheet CC BY 4.0)
Basis: ROBOTIS e-Manual AX-12A dimension drawing.
Catalog version: 2026-10-20

Overall (mm): length 50.0, width 37.0, height 32.0
- 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.

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

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- ROBOTIS: AX-12/AX-12A e-Manual — web — Publisher's page; dimensions are facts — https://emanual.robotis.com/docs/en/dxl/ax/ax-12a/
- ROBOTIS (GitHub): AX-12A dimension drawing — web — Publisher's page; dimensions are facts — https://raw.githubusercontent.com/ROBOTIS-GIT/emanual/master/assets/images/dxl/ax/ax-12a_dimension.png

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/robotis-dynamixel-ax-12a/index.json
API: https://xemstudio.com/api/geometry?object=robotis-dynamixel-ax-12a