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Syringe cradle for 10, 20 and 60 mL barrels
What are the dimensions of a cradle that holds a syringe as a Stirling power cylinder? · Standard part · basis: Saddle drawn at the barrel OD of the plastic-syringes entries (10 mL Ø15.9, 20 mL Ø21.0, 60 mL Ø29.0); M3 clearance Ø3.4
Long Earth Society build part. The printed parts for the LES can engine, sized to the cans, syringes, CDs and bearings in the library. 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 40 mm long block with a half-round saddle at the syringe barrel OD exactly (fit: socket): Ø15.9 for 10 mL, Ø21.0 for 20 mL, Ø29.0 for 60 mL.
- The saddle axis lies on the block's top face, so the block is barrel OD + 14 wide and half the barrel OD + 4 tall.
- Four Ø3.4 holes at x ±14 and y ±(OD/2 + 3.5) take M3 screws from the saddle face into the frame; at that spacing the screw heads clear the barrel.
Sizes
| file | barrel OD | length | width | height |
|---|---|---|---|---|
| syringe-cradle-10ml | 15.9 | 40 | 29.9 | 11.95 |
| syringe-cradle-20ml | 21.0 | 40 | 35.0 | 14.5 |
| syringe-cradle-60ml | 29.0 | 40 | 43.0 | 18.5 |
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 |
|---|---|---|---|---|
| syringe cradle | Ø15.9 / Ø21.0 / Ø29.0 | 10 / 20 / 60 mL syringe barrel | socket | syringe-cradle-* |
| cradle screw holes | Ø3.4 | M3 screw clearance | designed | syringe-cradle-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Stirling engine | web | CC BY-SA 4.0 (text) |
| Long Earth Society | Can engine build | video, web | LES site |
| Long Earth Society | Engine builds (videos and write-ups) | 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
| syringe-cradle-10ml | cradle for a 10ml syringe: 40 × 29.9 × 11.95, Ø15.9 half-trough for the barrel (exact), 4 × M3 clearance (Ø3.4) at 28 × 22.9 centres to the frame | STEP · STL |
| syringe-cradle-20ml | cradle for a 20ml syringe: 40 × 35 × 14.5, Ø21.0 half-trough for the barrel (exact), 4 × M3 clearance (Ø3.4) at 28 × 28 centres to the frame | STEP · STL |
| syringe-cradle-60ml | cradle for a 60ml syringe: 40 × 43 × 18.5, Ø29.0 half-trough for the barrel (exact), 4 × M3 clearance (Ø3.4) at 28 × 36 centres to the frame | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=syringe-cradle
How it fits
Goes in or on
Plastic syringes 1–60 mL as pistons and cylindersbarrel in the Ø15.9 / 21.0 / 29.0 saddleConnects to
Syringe pistonsthe piston that runs in the barrel
Can-engine cap for 53.3, 58, 66 and 76.2 mm canstransfer tube from the cap's barb to the syringe tipAlternatives
Can-engine diaphragmdiaphragm power piston insteadIn these build lists
Soda-can gammaA 12 oz can as the displacer cylinder over a tea light, a 10 mL syringe barrel a…You might also need
Questions
What diameter is a 10 mL syringe barrel?
Ø15.9 outside, 14.5 inside; syringe-cradle-10ml's saddle is Ø15.9.
How is the cradle fixed?
Four M3 screws through Ø3.4 holes, 28 mm apart along the barrel.