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Con-rods and links with a 626 big end and a 625 small end: 55 to 488 mm
What con-rod carries the load of a charged 48 mm Stirling piston? · Hardware · basis: 626 and 625 sizes from their standards; lengths are design values
Long Earth Society build part. The con-rods of my performance engines. 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
- 5 in table
Notes
- At 5 bar gauge the piston force swings about ±307 N; a 626 big end on a Ø6 crank pin and a 625 small end on the Ø5 wrist pin carry it on ball bearings.
Sizes
| length_mm | big end | small end |
|---|---|---|
| 100.0 | 626 | 625 |
| 120.0 | 626 | 625 |
| 55.0 | 626 | 625 |
| 60.0 | 626 | 625 |
| 488.4 | 626 | 625 |
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 |
|---|---|---|---|---|
| big end | Ø19 × 6 pocket, Ø15 lip | 626 bearing OD | press | all |
| small end | Ø16 × 5 pocket, Ø12 lip | 625 bearing OD | press | 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 5 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| conrod-626-625-100 | con-rod 100 between eyes, 7 thick: 626 pocket Ø19 × 6 (big end), 625 pocket Ø16 × 5 (small end) | STEP · STL |
| conrod-626-625-120 | con-rod 120 between eyes, 7 thick: 626 pocket Ø19 × 6 (big end), 625 pocket Ø16 × 5 (small end) | STEP · STL |
| conrod-626-625-55 | con-rod 55 between eyes, 7 thick: 626 pocket Ø19 × 6 (big end), 625 pocket Ø16 × 5 (small end) | STEP · STL |
| conrod-626-625-60 | con-rod 60 between eyes, 7 thick: 626 pocket Ø19 × 6 (big end), 625 pocket Ø16 × 5 (small end) | STEP · STL |
| conrod-626-625-488.4 | con-rod 488.4 between eyes, 7 thick: 626 pocket Ø19 × 6 (big end), 625 pocket Ø16 × 5 (small end) | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=stirling-conrods-626-625
How it fits
In these build lists
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Questions
Which engine uses which?
100: both rods of the horizontal gamma and the walking-beam gamma's displacer; 120 and 55: the beta's piston and displacer; 60 and the long link: the walking beam's two links.