Tri-clamp honed cylinder spool: 2 in × 6 in, bore finished Ø48.00 — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/tri-clamp-honed-cylinder-spool/  (CC BY 4.0)
Basis: Standard 2 in × 6 in spool (ASME BPE tube Ø50.8 × 1.65, ISO 2852 faces) with the bore opened from Ø47.5 to Ø48.00 so it is round, straight and finished along its whole length
Catalog version: 2026-10-20

Sizes: see table below
- A standard 6 in spool sent out to have its bore finished: Ø48.00 through the tube and both ferrules, so the free-piston mover's sleeve (Ø48.00) runs in it as a clearance seal with no contact. The finish and roundness are the machinist's to hold; the fit class says what the bore is for.
- Opening 47.5 to 48.00 leaves a 1.40 wall: at a 30 bar relief setting the hoop stress is p·D / 2t = 3.0 × 48 / 2.8 ≈ 51 MPa.
- The ferrule faces are untouched clamp faces. The Type B gasket's lip (Ø45.3) stands 1.95 into the bore at each end, so the mover never reaches the last 3 mm at either face (Mating features).
- On the thermoacoustic generators the alternator's coils and return shell clamp round this spool's tube: the magnets move inside, the coils stay outside, and no wire passes through the pressure wall.

feature  value
bore  Ø48.00 × 152.4 (through)
tube OD  Ø50.8
wall after finishing  1.40
faces  ISO 2852, 2 in

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- ASME: BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall) — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment
- ISO (via iTeh sample): ISO 2852 clamp liners: face profile and flange / groove diameters — PDF — standard excerpt; dimensions are facts — https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf
- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/tri-clamp-honed-cylinder-spool/index.json
API: https://xemstudio.com/api/geometry?object=tri-clamp-honed-cylinder-spool