# Frame for the horizontal tri-clamp gamma

> What frame holds a horizontal two-cylinder tri-clamp Stirling?

- Category: Hardware › Stirling & thermoacoustic
- Kind: Hardware
- Basis: Design values
- Page: https://xemstudio.com/objects/tri-clamp-horizontal-gamma-frame/ · JSON: https://xemstudio.com/api/geometry?object=tri-clamp-horizontal-gamma-frame · Plain text: https://xemstudio.com/objects/tri-clamp-horizontal-gamma-frame/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

- One base with everything the engine stands on: a cradle under the water jacket, two pedestals for spool hangers on the power cylinder and bounce spool, the displacer-rod guide, and two uprights with the crank's 608 bearings.

## 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 |
|---|---|---|---|---|
| crank uprights | Ø22 × 7 pockets | 608 bearing OD | press | all |
| guide block | Ø10 × 10 | 6 × 10 × 10 sleeve bushing | press | all |
| cradle | Ø50.8 seat | hot-spool tube OD | designed | all |
| tapped holes | M5 Ø4.2 × 15, M4 Ø3.3, M3 bracket Ø3.4 + 90° countersink | hanger bars, torch stand, shroud, generator | designed | all |

## Sizes

| feature | value |
|---|---|
| base | 800 × 250 × 8 |
| axis height | 138 above the bench |
| crank axis | x 487.5 |

## Where the files are

- 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/tri-clamp-horizontal-gamma-frame/index.json

- horizontal-gamma-frame-2in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-horizontal-gamma-frame/horizontal-gamma-frame-2in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-horizontal-gamma-frame/horizontal-gamma-frame-2in.stl) — horizontal gamma frame: base 800 × 250 × 8, jacket cradle, two hanger pedestals (M5 tapped), displacer-rod guide block (Ø10 seat), two crank uprights with 608 pockets, torch-stand and shroud holes (M4 tapped)

## Questions

**How high are the cylinders?**

138 mm above the bench: the Ø200 flywheel clears the base by 30.

## Fits with

- [Build list: Tri-clamp horizontal gamma generator, 2 in, chargeable](https://xemstudio.com/objects/list-tri-clamp-horizontal-gamma/)