Xem Studiomeasured geometryLibrary › Hardware › Stirling & thermoacoustic ·
Rocking link 170 mm (crank to rocker)
What rocks the test tube of a marble Stirling engine? · Hardware · basis: My geometry: same section as the pin-end con-rods (8 × 5, Ø3 ends)
Long Earth Society build part. Rocking link of the marble engine. 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
- 3 in table
Notes
- 170 mm between Ø3 holes; from the crank pin that leads the power pin by 90° to the rocker's lever pin. Length chosen so the rocker's mean angle is level.
Sizes
| feature | value_mm |
|---|---|
| centres | 170.0 |
| section | 8 × 5 |
| holes | Ø3 |
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 |
|---|---|---|---|---|
| end holes | Ø3 | dowel-3x12 crank pin and lever pin (turn in them) | run | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| 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
| rocking-link-170 | rocking link, 170 mm centres, Ø3 holes, 8 wide × 5 thick: crank pin to the rocker's lever pin | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=marble-engine-rocking-link
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Questions
Why 170 mm?
It reaches from the crank to the rocker's lever pin 45 below the pivot, so the 7.5 mm crank throw rocks the tube -7.9° to +7.9°, and it sets the crank where the plunger never bottoms.