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Ø5 rods with E-clip grooves, 120 and 150 mm
What size rod with E-clip grooves carries a free-piston Stirling piston or displacer? · Hardware · basis: Ø5 rod; DIN 6799 E-clip groove for Ø5 (Ø4.0 × 0.7), 10 mm from each end
Long Earth Society build part. Power take-off on the LES free-piston test bed. 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
- 2 in table
Notes
- Plain Ø5 rods with two DIN 6799 E-clip grooves, Ø4.0 × 0.7 wide, 10 mm from each end; 0.5 mm chamfer on one end.
- Piston-rod-5x120-grooved (Ø5 × 120) carries the free-piston core's power piston and the linear alternator mover; displacer-rod-5x150-grooved (Ø5 × 150) carries the displacer.
- The parts on them have Ø5 bores (fit: slide); E-clips in the grooves locate them.
Sizes
| file | diameter | length | grooves | groove from ends |
|---|---|---|---|---|
| piston-rod-5x120-grooved | 5 | 120 | 2 × Ø4.0 × 0.7 | 10 |
| displacer-rod-5x150-grooved | 5 | 150 | 2 × Ø4.0 × 0.7 | 10 |
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 |
|---|---|---|---|---|
| rod E-clip grooves | Ø4.0 × 0.7 | DIN 6799 E-clip for Ø5 | designed | piston-rod-* |
| rod bores | Ø5 | Ø5 rod | slide | all |
| displacer in the liner | liner bore − 1.0 (0.5 radial) | cylinder liner bore | designed | displacer-* |
| rod E-clip grooves | Ø4.0 × 0.7 | DIN 6799 E-clip for Ø5 | designed | displacer-rod-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| NASA (NTRS, public domain) | Linear alternator design for free-piston Stirling convertors (2005) | US Government work, public domain | |
| NASA (NTRS, public domain) | Sunpower/NASA 80 We free-piston Stirling convertor (2002) | US Government work, public domain | |
| Wikipedia | Linear alternator | web | CC BY-SA 4.0 (text) |
| Wikipedia | Free-piston engine | web | CC BY-SA 4.0 (text) |
| Long Earth Society | Engine builds | web, video | LES site |
Free files
★ Free files 2 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| piston-rod-5x120-grooved | Ø5 × 120 piston rod with two DIN 6799 E-clip grooves Ø4.0 × 0.7, 10 mm from each end (free-piston core version; the tri-clamp kit uses the 5 mm tube) | STEP · STL |
| displacer-rod-5x150-grooved | Ø5 × 150 displacer rod with two DIN 6799 E-clip grooves Ø4.0 × 0.7, 10 mm from each end | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=e-clip-grooved-rods-5mm
How it fits
Connects to
Free-piston Stirling power piston Ø29.9 × 30 and…Ø5 rod in the piston's bore
Free-piston Stirling displacer Ø29 × 75 and Ø39 ×…Ø5 rod in the displacer's boss
Linear alternator movermover clamps the Ø5 rod
Gas-spring piston Ø14.9 × 15 and Ø19.9 × 20Ø5 bore on the rodAlternatives
Crankshafts Ø3, Ø5 and Ø8 with full-length D-flatother Ø5 rods and tubesAlso needed
Metric shafts Ø3 to Ø10 with D-flats and clip…eclip-5mm in the groovesQuestions
What E-clip fits a 5 mm rod?
DIN 6799 for Ø5: groove Ø4.0 × 0.7, as cut 10 mm from each end of these rods.
Which rod is the displacer rod?
The 150 mm one; the 120 mm rod is the power piston rod.