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2 in × 3 in spool with the bore finished Ø48.00 (bored and honed power cylinder)
How do I turn a 2 in tri-clamp spool into a piston cylinder? · Hardware · basis: Stock 2 in × 3 in spool (ISO 2852 faces, ASME BPE tube); the finished bore is a design value
Long Earth Society build part. The power cylinder of my performance engines: a stock spool, bored and honed. 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
- 4 in table
Notes
- A standard 2 in × 3 in spool sent out to be bored and honed through to Ø48.00. Stock tube is made to its OD and wall, so its bore can be anywhere from about 46.8 to 48.0 mm and is not round to a sliding standard; Ø48.00 cleans up every tube in tolerance and leaves about 1.4 mm of wall.
- The bore is a running fit for the Ø48.00 × 34 clearance-seal piston (no rings): the honed bore and the piston's ground OD together are the seal. Both performance engines use it with a 36 mm stroke.
- Honed surface: the whole bore face to face. The faces stay as made.
Sizes
| feature | value |
|---|---|
| faces | ISO 2852 2 in, 76.2 face to face |
| finished bore | Ø48.00 through, honed |
| piston | Ø48.00 × 34 |
| stroke | 36.0 |
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 |
|---|---|---|---|---|
| faces | ISO 2852 2 in, 76.2 face to face | Type B gaskets, 2 in clamps | clamp | all |
| finished bore | Ø48.00 through, honed | Ø48.00 clearance-seal piston (no rings) | run | all |
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
| spool-2in-3in-bored-48.00 | 2 in × 3 in (76.2) spool, ISO 2852 faces, bore finished Ø48.00 through (honed: the piston's clearance seal) | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=tri-clamp-spool-bored-honed
How it fits
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Questions
Does it need rings?
No: the piston is a clearance seal. Its leakage loss is in the engine's numbers for 10, 15 and 20 µm radial clearance.