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Wrist pin Ø3 × 16
What size wrist pin goes in a small Stirling piston or crosshead? · Hardware · basis: Ø3 at the piston boss and crosshead holes (fit: press); 0.4 chamfer both ends
Long Earth Society build part. The power piston and liner on the LES 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
- 3 in table
Notes
- A Ø3 × 16 pin, 0.4 mm chamfer on both ends.
- It presses into the power piston's wrist-pin boss or through the crosshead's cheeks (fit: press); the con-rod end turns on it.
Sizes
| parameter | value |
|---|---|
| diameter | 3 |
| length | 16 |
| chamfers | 0.4 both ends |
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 |
|---|---|---|---|---|
| wrist pin | Ø3 | piston boss / crosshead clevis | press | wrist-pin-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Crosshead | web | CC BY-SA 4.0 (text) |
| Wikipedia | Piston | web | CC BY-SA 4.0 (text) |
| James R. Senft | Miniature Stirling engine piston fits (LTD book) | book | reference 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
Plain text: sheet.txt · JSON: /api/geometry?object=wrist-pin-3x16
How it fits
Goes in or on
Power piston Ø16, 20, 25, 30 with Ø3 wrist-pin bossin the wrist-pin boss
Crosshead Ø8 × 24 for a Ø3 piston rodthrough the clevis cheeksAlternatives
Dowel pins, 2–6 mmØ3 × 16 dowelIn these build lists
Gamma Stirling, 2 in tri-clampHot spool with a shell displacer, a crank head that carries the crankshaft, the …Questions
What wrist pin fits the power piston?
Ø3 × 16, pressed in the Ø3 boss hole.
Can a stock dowel be used?
Any Ø3 × 16 pin is the same size; dowel-pins-metric lists Ø3 × 16.