# Robotis DYNAMIXEL XL430-W250-T servo: case, horn bolt circle and frame mounting holes

> What are the Robotis DYNAMIXEL XL430-W250-T case dimensions, horn bolt circle and frame mounting-hole positions?

- Category: Electronic components › Motors
- Kind: Modern device
- Basis: Robotis official STEP model of the XL430 (robotis.com download 773) and the XL430-W250 drawings in the Robotis e-Manual.
- Page: https://xemstudio.com/objects/robotis-dynamixel-xl430-w250-t/ · JSON: https://xemstudio.com/api/geometry?object=robotis-dynamixel-xl430-w250-t · Plain text: https://xemstudio.com/objects/robotis-dynamixel-xl430-w250-t/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 46.5 | 28.5 | 40.9 |

**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.

## Notes

- Case 28.5 × 46.5 × 34.0 mm with R3.25 vertical corners. The output horn axis is parallel to the 34.0 height, centred across the 28.5 width, 12.0 mm from the case centre toward the horn end (11.25 mm from that end).
- Output horn Ø20.5 stands 2.0 mm above the case top with a Ø8.0 hub boss to 3.9 mm; the rear idler Ø20.5 stands 2.0 mm below the case bottom with a Ø7.9 hub 1.0 mm further, giving 40.9 mm overall along the horn axis.
- Horn and idler bolt circle: PCD 16 about the horn axis, 4 × Ø2.0 on the case axes and 4 × Ø1.7 on the diagonals, each 3.5 mm deep.
- Frame holes are threaded in the servo and modelled at the Ø2.1 tap-drill size, 4.0 mm deep: 2 in the horn face, 4 on each long side, 4 in the rear end and 2 in the horn end (table: x across the width, y along the length from the case centre, z up from the case bottom).
- Modelled: case, horn, idler, hubs and every mounting hole. Not modelled: case-corner assembly screws, the shallow recesses around horn and idler, the horn spline, edge chamfers and the two cable connectors with their openings.
- Dimensions are exact nominal (true size), no tolerance added.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| horn bolt circle | 4 × Ø2.0 + 4 × Ø1.7 on PCD 16, 3.5 deep | horn-mounted link, wheel or bracket screws | designed | all |
| frame holes | Ø2.1 tap-drill size, 4.0 deep; side pairs 24.0 × 12.0 apart | Robotis-pattern frames or a custom bracket, screws of the servo's thread | designed | all |
| case | 28.5 × 46.5 × 34.0, R3.25 corners | pocket or cradle in a printed or machined frame | socket | all |

## Sizes

| face | holes | positions (mm) | Ø × depth (mm) |
|---|---|---|---|
| horn face (top) | 2 | x ±11.0, y +4.0 | 2.1 × 4.0 |
| each long side (±x) | 4 | y −16.0 and +8.0; z 11.0 and 23.0 | 2.1 × 4.0 |
| rear end (−y) | 4 | x ±8.0; z 11.0 and 23.0 | 2.1 × 4.0 |
| horn end (+y) | 2 | x ±8.0; z 23.0 | 2.1 × 4.0 |
| horn and rear idler | 4 + 4 | PCD 16 about the horn axis (x 0, y +12.0) | 2.0 / 1.7 × 3.5 |

## Where the files are

- ROBOTIS: [XL430-W250 e-Manual: specifications and drawings](https://emanual.robotis.com/docs/en/dxl/x/xl430-w250/#drawings) — web — Publisher's page; dimensions are facts
- ROBOTIS: [DYNAMIXEL XL430-W250-T product page](https://www.robotis.us/dynamixel-xl430-w250-t/) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/robotis-dynamixel-xl430-w250-t/index.json

- robotis-dynamixel-xl430-w250-t: [STEP](https://xemstudio.com/files/hardware/robotis-dynamixel-xl430-w250-t/robotis-dynamixel-xl430-w250-t.step) · [STL](https://xemstudio.com/files/hardware/robotis-dynamixel-xl430-w250-t/robotis-dynamixel-xl430-w250-t.stl) — Robotis DYNAMIXEL XL430-W250-T servo: case, horn bolt circle and frame mounting holes

## Questions

**What is the horn bolt circle of the XL430-W250-T?**

PCD 16 mm about the horn axis: four Ø2.0 holes on the case axes and four Ø1.7 on the diagonals, 3.5 mm deep. The rear idler carries the same pattern.

**How big is the XL430 case?**

28.5 × 46.5 × 34.0 mm with R3.25 corners; 40.9 mm overall along the horn axis including the horn, idler and hubs.

**Where are the side mounting holes?**

Four per long side, at 16.0 mm behind and 8.0 mm ahead of the case centre, 11.0 and 23.0 mm above the case bottom; Ø2.1 tap-drill size, 4.0 mm deep.

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