# Frame for the 2 in tri-clamp tee diaphragm gamma

> What holds the tri-clamp diaphragm gamma together?

- Category: Hardware › Stirling & thermoacoustic
- Kind: Hardware
- Basis: Positions from the engine layout (tools/gen_diaphragm.py gamma_layout); ISO 273 medium clearance for M3
- Page: https://xemstudio.com/objects/tri-clamp-diaphragm-gamma-frame/ · JSON: https://xemstudio.com/api/geometry?object=tri-clamp-diaphragm-gamma-frame · Plain text: https://xemstudio.com/objects/tri-clamp-diaphragm-gamma-frame/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

**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 piece: a base plate, a ring that stands the hot cap 17.5 mm above a tea light (windows let the air in), a tower behind the engine, a shelf for the two crank stands and a bracket for the beam pivot post.
- Crank axis 208.0 above the base and 100 mm from the column axis, beam pivot 380.1 above the base.

## 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 |
|---|---|---|---|---|
| column ring | Ø42 / Ø50 × 33.5 | back of the 2 in hot cap | designed | gamma-frame-* |
| shelf and bracket holes | Ø3.4 | M3 clearance (ISO 273 medium) | designed | gamma-frame-* |

## Sizes

| feature | value |
|---|---|
| base | 210 × 200 × 8 |
| column ring | Ø50 / Ø42 × 33.5 |
| shelf top | 148.0 |
| bracket top | 326.1 |

## Where the files are

- ISO: [ISO 273 clearance holes for bolts and screws (fine / medium / coarse)](https://www.iso.org/standard/4196.html) — standard — dimensions are facts (verify at link)
- 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-diaphragm-gamma-frame/index.json

- gamma-frame-2in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-diaphragm-gamma-frame/gamma-frame-2in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-diaphragm-gamma-frame/gamma-frame-2in.stl) — frame for the 2 in tee diaphragm gamma: base 210 × 200 × 8, column ring Ø50 / Ø42 × 33.5 under the hot cap, tower to 326.1, crank-stand shelf at 148.0, pivot-post bracket at 326.1

## Questions

**What does the frame carry?**

The column (on the ring), the crank stands (on the shelf) and the beam pivot post (on the bracket).

## Fits with

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