{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "tri-clamp-spool",
 "name": "Tri-clamp spool (two ferrules on a tube), 1.5 and 2 inch",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Tri-clamp",
 "year": null,
 "question": "What are the face-to-face lengths and volumes of 1.5 and 2 inch tri-clamp spools?",
 "tags": [
  "tri-clamp",
  "sanitary",
  "spool",
  "pipe",
  "stirling",
  "resonator"
 ],
 "aliases": [
  "tri clamp spool",
  "tc spool",
  "sanitary spool",
  "tri clover spool",
  "2 inch spool",
  "resonator section"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 7,
 "url": "https://xemstudio.com/objects/tri-clamp-spool/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-spool/sheet.txt",
 "sheet": {
  "basis": "ISO 2852 faces on ASME BPE 16 ga tube; catalog lengths",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Face-to-face length is the spool's stated length. Internal volume sets a thermoacoustic engine's resonance; volumes assume 16 ga tube.",
   "2 in bore: 50.8 − 2×1.65 = 47.5 mm → 17.7 cm³ per cm. 1.5 in: 34.8 mm → 9.5 cm³ per cm.",
   "Stack-up per joint: two faces + one compressed gasket web ≈ 2.1 mm (ISO 2852 V). A clamp adds about 10 mm of radial envelope beyond the flange.",
   "The files carry the full ISO 2852 face, so a printed spool mates with a printed cap and a real clamp for mock-ups."
  ],
  "table": {
   "columns": [
    "size_in",
    "length_in",
    "length_mm",
    "bore_mm",
    "volume_cm3"
   ],
   "rows": [
    [
     "1.5",
     3,
     76.2,
     34.8,
     72
    ],
    [
     "1.5",
     6,
     152.4,
     34.8,
     145
    ],
    [
     "1.5",
     12,
     304.8,
     34.8,
     290
    ],
    [
     "2",
     3,
     76.2,
     47.5,
     135
    ],
    [
     "2",
     6,
     152.4,
     47.5,
     270
    ],
    [
     "2",
     12,
     304.8,
     47.5,
     540
    ],
    [
     "2",
     18,
     457.2,
     47.5,
     810
    ]
   ]
  }
 },
 "sheet_text": "Tri-clamp spool (two ferrules on a tube), 1.5 and 2 inch — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-spool/  (CC BY 4.0)\nBasis: ISO 2852 faces on ASME BPE 16 ga tube; catalog lengths\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Face-to-face length is the spool's stated length. Internal volume sets a thermoacoustic engine's resonance; volumes assume 16 ga tube.\n- 2 in bore: 50.8 − 2×1.65 = 47.5 mm → 17.7 cm³ per cm. 1.5 in: 34.8 mm → 9.5 cm³ per cm.\n- Stack-up per joint: two faces + one compressed gasket web ≈ 2.1 mm (ISO 2852 V). A clamp adds about 10 mm of radial envelope beyond the flange.\n- The files carry the full ISO 2852 face, so a printed spool mates with a printed cap and a real clamp for mock-ups.\n\nsize_in  length_in  length_mm  bore_mm  volume_cm3\n1.5  3  76.2  34.8  72\n1.5  6  152.4  34.8  145\n1.5  12  304.8  34.8  290\n2  3  76.2  47.5  135\n2  6  152.4  47.5  270\n2  12  304.8  47.5  540\n2  18  457.2  47.5  810\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ISO (via iTeh sample): ISO 2852:1974 clamp liners with gaskets (face and gasket profile, §6.1 and §8) — PDF — standard excerpt; dimensions are facts — https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf\n- McMaster-Carr: Sanitary tube spools (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/sanitary-fittings/\n- Glacier Tanks: Tri-clamp spools (dimensions on product pages) — web, PDF — vendor catalog [verify license at link] — https://www.glaciertanks.com/tri-clamp-spools\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 7 parts): https://xemstudio.com/files/hardware/tri-clamp-spool/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-spool\n",
 "sources": [
  {
   "publisher": "ISO (via iTeh sample)",
   "title": "ISO 2852:1974 clamp liners with gaskets (face and gasket profile, §6.1 and §8)",
   "url": "https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf",
   "formats": [
    "PDF"
   ],
   "license": "standard excerpt; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Sanitary tube spools (free STEP per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/sanitary-fittings/",
   "formats": [
    "STEP",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Glacier Tanks",
   "title": "Tri-clamp spools (dimensions on product pages)",
   "url": "https://www.glaciertanks.com/tri-clamp-spools",
   "formats": [
    "web",
    "PDF"
   ],
   "license": "vendor catalog",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "tri-clamp-ferrule",
  "tri-clamp-end-cap"
 ],
 "faq": [
  {
   "q": "What is the internal volume of a 2 inch tri clamp spool?",
   "a": "About 17.7 cm³ per cm of length with 16 ga tube (47.5 mm bore): a 6 in spool is roughly 270 cm³, a 12 in spool 540 cm³ before the ferrule faces."
  },
  {
   "q": "What is the bore of a 1.5 inch tri clamp spool?",
   "a": "34.8 mm (38.1 mm OD tube, 1.65 mm wall), about 9.5 cm³ per cm."
  },
  {
   "q": "How long is a tri clamp joint stack-up?",
   "a": "Two ferrule faces plus one compressed gasket web, about 2.1 mm per joint (ISO 2852 V). A clamp adds roughly 10 mm of radial envelope beyond the flange."
  }
 ],
 "files_license": null,
 "offers": [
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    "stl"
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-1.5in-3in.stl",
   "note": "1.5 in spool, 76.2 mm face to face, 16 ga; ISO 2852 faces"
  },
  {
   "file": "tc-spool-1.5in-6in",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-1.5in-6in.stl",
   "note": "1.5 in spool, 152.4 mm face to face, 16 ga; ISO 2852 faces"
  },
  {
   "file": "tc-spool-1.5in-12in",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-1.5in-12in.stl",
   "note": "1.5 in spool, 304.8 mm face to face, 16 ga; ISO 2852 faces"
  },
  {
   "file": "tc-spool-2in-3in",
   "formats": [
    "step",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-3in.stl",
   "note": "2 in spool, 76.2 mm face to face, 16 ga; ISO 2852 faces"
  },
  {
   "file": "tc-spool-2in-6in",
   "formats": [
    "step",
    "stl"
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-6in.stl",
   "note": "2 in spool, 152.4 mm face to face, 16 ga; ISO 2852 faces"
  },
  {
   "file": "tc-spool-2in-12in",
   "formats": [
    "step",
    "stl"
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-12in.stl",
   "note": "2 in spool, 304.8 mm face to face, 16 ga; ISO 2852 faces"
  },
  {
   "file": "tc-spool-2in-18in",
   "formats": [
    "step",
    "stl"
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-18in.stl",
   "note": "2 in spool, 457.2 mm face to face, 16 ga; ISO 2852 faces"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-spool/index.md"
}