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Tube piston rods Ø5 × Ø3.4
What tube piston rod lets the displacer rod pass through the piston? · Hardware · basis: Ø5 OD tube with a Ø3.4 bore, so the Ø3 displacer rod passes inside without touching
Long Earth Society build part. The shafts, rods and pins every engine here turns on. 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
- Ø5 OD × Ø3.4 ID tubes, 80, 120 and 160 long, 0.3 chamfers on both ends.
- The OD seats in the piston plug's Ø5 socket and in the rhombic lower yoke or the flexure hub collars; the Ø3 displacer rod runs inside with 0.2 mm radial gap by design.
- Wall thickness 0.8.
Sizes
| file | OD | ID | length |
|---|---|---|---|
| tube-rod-5x3.4x80 | 5 | 3.4 | 80 |
| tube-rod-5x3.4x120 | 5 | 3.4 | 120 |
| tube-rod-5x3.4x160 | 5 | 3.4 | 160 |
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 |
|---|---|---|---|---|
| shafts, rods, pins | Ø3 / Ø5 / Ø8 | the bores listed on each mating object | slide | all |
| tube rod bore | Ø3.4 | Ø3 rod (no contact) | designed | tube-rod-* |
| tube rod OD | Ø5 | piston plug socket / yoke / collars | slide | tube-rod-* |
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 3 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| tube-rod-5x3.4x80 | Ø5 × Ø3.4 × 80 tube piston rod: into the piston plug socket, onto the rhombic lower yoke or the flexure collars; the Ø3 displacer rod runs inside | STEP · STL |
| tube-rod-5x3.4x120 | Ø5 × Ø3.4 × 120 tube piston rod: into the piston plug socket, onto the rhombic lower yoke or the flexure collars; the Ø3 displacer rod runs inside | STEP · STL |
| tube-rod-5x3.4x160 | Ø5 × Ø3.4 × 160 tube piston rod: into the piston plug socket, onto the rhombic lower yoke or the flexure collars; the Ø3 displacer rod runs inside | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=tube-piston-rods-5mm
How it fits
Goes in or on
Tri-clamp flexure headØ5 OD in the piston plug socketConnects to
Rhombic drive crank gear, module 1.5, 44 T, 7 mm…Ø5 tube on the lower yoke
Rod clevises for a Ø2 or Ø3 rod or a Ø5 tube, 5…rod-clevis-5mm-tube socketAlso needed
Displacer rods Ø2 × 60, 78, 100 and 180, Ø3 ×…Ø3 rod runs insideIn these build lists
Beta Stirling, rhombic drive, 2 in tri-clampDisplacer and piston in one bore, driven by two counter-rotating gears on a rhom…Free-piston Stirling, 2 in tri-clampNo crank: piston and displacer each hang on a stack of spiral flexures, with a t…You might also need
Questions
Why is the piston rod a tube?
In a beta or free-piston engine the displacer rod passes through the piston: the Ø3 rod runs inside the Ø3.4 bore of the Ø5 tube.
What does the tube rod connect to?
The piston plug socket (Ø5) at one end; the rhombic lower yoke, the flexure hub collars or the 5 mm tube rod clevis at the other.