# Hanger post: holds a spool hanger round a horizontal 2 in tube

> How do I support a horizontal tri-clamp spool off the bench?

- Category: Stirling engines › Tri-clamp engine parts
- Kind: Hardware
- Basis: Hole spacing = the 2 in spool hanger's bar holes (±39.4); bar face 39.4 from the tube axis
- Page: https://xemstudio.com/objects/tube-hanger-post/ · JSON: https://xemstudio.com/api/geometry?object=tube-hanger-post · Plain text: https://xemstudio.com/objects/tube-hanger-post/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part.

## Notes

- An upright plate with a foot: the spool hanger's bar bolts to its face with two M5 × 16 into tapped holes 78.8 apart, the hanger turned so its ring stands vertical round a horizontal tube with its axis 235.3 above the bench.
- On the twin-piston engine one post sits under each bounce spool.

## 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 |
|---|---|---|---|---|
| bar face | flat, 39.4 from the tube axis | spool hanger bar | designed | all |
| holes | 2 × Ø4.2 (M5 tap drill) 78.8 apart | shcs-m5x16 through the hanger bar | designed | all |

## Sizes

| feature | value |
|---|---|
| axis height | 235.3 |
| holes | 2 × M5 tapped, 78.8 apart |

## Where the files are

- Xem Studio: [tools/gen_ta_power.py: the network model and every dimension on this page](https://xemstudio.com/) — code — CC BY 4.0
- Long Earth Society: [Engine builds](https://longearthsociety.com/engineering/) — web, video — LES site

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

Index: https://xemstudio.com/files/hardware/tube-hanger-post/index.json

- hanger-post-2in-h235.3: [STEP](https://xemstudio.com/files/hardware/tube-hanger-post/hanger-post-2in-h235.3.step) · [STL](https://xemstudio.com/files/hardware/tube-hanger-post/hanger-post-2in-h235.3.stl) — post for a horizontal 2 in tube at 235.3: plate 30 × 8 × 290.3, foot 30 × 58 × 6, 2 × M5 tap drill Ø4.2 at ±39.4 about the tube axis

## Questions

**Can it hold a vertical tube?**

Use the 2020 stand for that; the post is for horizontal spools.

## Fits with

- [Spool hanger collars: clamp a tri-clamp spool to 2020 extrusion over the flame (1.5, 2, 3 in)](https://xemstudio.com/objects/spool-hanger-collars/)
- [Build list: Thermoacoustic-Stirling engine with twin free-piston alternators, 2 in, pressurised](https://xemstudio.com/objects/list-ta-twin-piston-2in/)