Library › Hardware › Stirling & thermoacoustic ·
Frame for the 2 in tri-clamp cross diaphragm gamma
What holds the tri-clamp cross diaphragm gamma on the bench? · Hardware · basis: Positions from the engine layout (tools/gen_cross_engine.py cross_layout); ISO 273 medium clearance for M5; Ø3.3 for an M4 thread
Long Earth Society build part. The frame of my cross gamma. The engines
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. Mating features
- sizes
- 4 in table
Notes
- One piece: a base plate with the torch stand on it, and a wall behind the engine. The 2 in spool hanger clamps the cross's lower run and its bar bolts to the wall with two M5 × 25 and nuts, so the whole engine hangs over the flame.
- A window in the wall leaves room for the jacket's fill port and the heat shield.
Sizes
| feature | value |
|---|---|
| base | 140 × 150 × 8 |
| wall | 124 × 10, top 227.5 |
| hanger screws | 2 × Ø5.5 at x ±39.4, z 213.5 |
| torch stand | 2 × Ø3.3 at x ±25, y 28 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| hanger holes | 2 × Ø5.5 | M5 clearance (ISO 273 medium) | designed | all |
| torch-stand holes | 2 × Ø3.3 (M4 tapped) | shcs-m4x10 | designed | all |
| wall face | flat, 39.4 from the run axis | spool hanger bar | designed | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| ISO | ISO 273 clearance holes for bolts and screws (fine / medium / coarse) | standard | dimensions are facts verify |
| Long Earth Society | Engine builds | web, video | LES site |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| cross-engine-frame-2in | frame: base 140 × 150 × 8, wall 124 × 10 to 227.5 with a 60 wide window, 2 gussets, 2 × Ø5.5 for the spool hanger at 213.5, 2 × Ø3.3 (M4 thread) for the torch stand | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=tri-clamp-cross-engine-frame

How it fits
In these build lists
Tri-clamp cross diaphragm gamma, 2 inA fast gamma in 2 in tri-clamp: a hot cap and short spool over a torch, a cross …You might also need
Questions
What does the frame carry?
The torch stand on the base and the engine on the spool hanger at the wall.

