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Tri-clamp finned cooler: clamp-on halves for a 2 in tube
How do I cool the cold side of a tri-clamp Stirling engine? · Hardware · basis: ASME BPE 2 in tube OD (Ø50.8); clearance under a standard clamp; fin sizes are design values
Long Earth Society build part. The fins on the cold leg of my elbow alpha. 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
- 1 in table
Notes
- Two halves close on the tube OD between the clamps of a 3 in spool (61.9 mm of plain tube); each half is 56 long with a 3 mm sleeve and nine Ø88 × 2 fins at 6 mm pitch.
- The halves leave 1 mm between them; four M4 × 30 screws and nuts through the ears pull them onto the tube (clamp fit).
- The fins clear the clamps: the clamp ring reaches 7.1 mm past the ferrule face, the cooler starts 3 mm beyond that.
Sizes
| size_in | bore_mm | length_mm | fin_od_mm | fins | screws |
|---|---|---|---|---|---|
| 2 | 50.8 | 56.0 | 88.0 | 9 | 4 × M4 × 30 + nuts |
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 |
|---|---|---|---|---|
| bore | Ø50.8 | 2 in tube OD | clamp | cooler-half-* |
| ear holes | Ø4.5 | M4 clearance (ISO 273 medium) | designed | cooler-half-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| ISO (via iTeh sample) | ISO 2852 clamp liners: face profile and flange / groove diameters | standard excerpt; dimensions are facts | |
| ASME | BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall) | standard | ASME; dimensions are facts 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
| cooler-half-2in-56 | clamp-on finned cooler half for the 2 in tube OD (Ø50.8 bore) × 56: 3 mm sleeve, fins Ø88 × 2 at 6 pitch, ears with 2 × Ø4.5 (M4) each side | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=tri-clamp-finned-cooler
How it fits
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Questions
Does it fit between the clamps of a 3 in spool?
Yes: 56 mm on 61.9 mm of plain tube, 3 mm clear of each clamp.
Is there a liquid-cooled option?
The jacket shell on this site clamps on the same tube in the same place.