Tri-clamp spool bored and honed: 2 in × 6 in, bore Ø48.00, a power-piston cylinder — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/tri-clamp-bored-spool/  (CC BY 4.0)
Basis: Stock 2 in × 6 in spool (gen_hardware.tc_spool: ISO 2852 faces, Ø50.8 × 1.65 tube) with the bore finished to Ø48.00 over its whole length: the finished part is drawn as its own part
Catalog version: 2026-10-20

Sizes: see table below
- A standard 2 in × 6 in spool with its bore opened from Ø47.5 to Ø48.00 end to end and finished as a running bore. The wall becomes 1.40 mm; the faces are untouched.
- On the free-piston generator the 48.00 bore is the power piston's clearance seal (the piston's 30 mm land runs in it) and the section of the vessel the alternator works through: the stator and coil sit outside the wall, so the vessel stays sealed and no wire passes through it.
- Hoop stress at the relief setting (15 bar gauge): 27.5 MPa. Do not clamp anything over the piston's seal zone: the generator hangs from the cooler spool S3.

feature  value
bore  Ø48.00 × 152.4, running fit for the piston land
wall  1.3999999999999986
faces  ISO 2852, 2 in

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- 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
- ASME: BPE Bioprocessing Equipment (tube OD and wall, clamp fittings) — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment
- 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-bored-spool/index.json
API: https://xemstudio.com/api/geometry?object=tri-clamp-bored-spool