{
 "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-sealed-generator-frame",
 "name": "Frame for the 2 in tri-clamp sealed diaphragm generator",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Stirling & thermoacoustic",
 "year": null,
 "question": "What holds the tri-clamp sealed diaphragm generator on the bench?",
 "tags": [
  "frame",
  "generator",
  "sealed",
  "tri-clamp",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "sealed stirling generator frame",
  "tri clamp generator frame"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/tri-clamp-sealed-generator-frame/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-sealed-generator-frame/sheet.txt",
 "sheet": {
  "basis": "Positions from the engine layout (tools/gen_sealed_generator.py layout); ISO 273 medium clearance for M5; Ø3.3 for an M4 thread",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "One piece: a base plate with the torch stand and the burner shroud on it, and a wall behind the engine. The spool hanger clamps the cross's lower run and its bar bolts to the wall with two M5 × 25 and nuts, so the whole engine hangs over the flame.",
   "A window in the wall leaves room for the shroud, the jacket and its fill ports."
  ],
  "table": {
   "columns": [
    "feature",
    "value"
   ],
   "rows": [
    [
     "base",
     "180 × 170 × 8"
    ],
    [
     "wall",
     "150 × 10, top 297.6"
    ],
    [
     "window",
     "x ±57, to 233.8"
    ],
    [
     "hanger screws",
     "2 × Ø5.5 at x ±39.4, z 279.6"
    ],
    [
     "torch stand",
     "2 × Ø3.3 at x ±25, y 28"
    ],
    [
     "shroud feet",
     "3 × Ø3.3 at (±59, 0), (0, −59)"
    ]
   ]
  }
 },
 "sheet_text": "Frame for the 2 in tri-clamp sealed diaphragm generator — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-sealed-generator-frame/  (CC BY 4.0)\nBasis: Positions from the engine layout (tools/gen_sealed_generator.py layout); ISO 273 medium clearance for M5; Ø3.3 for an M4 thread\nCatalog version: 2026-10-20\n\nSizes: see table below\n- One piece: a base plate with the torch stand and the burner shroud on it, and a wall behind the engine. The spool hanger clamps the cross's lower run and its bar bolts to the wall with two M5 × 25 and nuts, so the whole engine hangs over the flame.\n- A window in the wall leaves room for the shroud, the jacket and its fill ports.\n\nfeature  value\nbase  180 × 170 × 8\nwall  150 × 10, top 297.6\nwindow  x ±57, to 233.8\nhanger screws  2 × Ø5.5 at x ±39.4, z 279.6\ntorch stand  2 × Ø3.3 at x ±25, y 28\nshroud feet  3 × Ø3.3 at (±59, 0), (0, −59)\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ISO: ISO 273 clearance holes for bolts and screws (fine / medium / coarse) — standard — dimensions are facts [verify license at link] — https://www.iso.org/standard/4196.html\n- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/tri-clamp-sealed-generator-frame/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-sealed-generator-frame\n",
 "sources": [
  {
   "publisher": "ISO",
   "title": "ISO 273 clearance holes for bolts and screws (fine / medium / coarse)",
   "url": "https://www.iso.org/standard/4196.html",
   "formats": [
    "standard"
   ],
   "license": "dimensions are facts",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Long Earth Society",
   "title": "Engine builds",
   "url": "https://longearthsociety.com/engineering/",
   "formats": [
    "web",
    "video"
   ],
   "license": "LES site",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "list-tri-clamp-sealed-diaphragm-generator",
  "spool-hanger-collars",
  "tri-clamp-torch-stand",
  "tri-clamp-burner-shroud"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [
  {
   "feature": "hanger holes",
   "exact": "2 × Ø5.5",
   "mates": "M5 clearance (ISO 273 medium)",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "torch-stand and shroud holes",
   "exact": "5 × Ø3.3 (M4 tapped)",
   "mates": "shcs-m4x10",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "wall face",
   "exact": "flat, 39.4 from the engine axis",
   "mates": "spool hanger bar",
   "fit": "designed",
   "files": "all"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. Typical FDM: hole +0.0 to +0.1 mm on diameter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. Typical FDM: +0.2 mm.",
  "run": "turns or slides in use: pin in a link, rod through a guide. Typical FDM: +0.3 mm.",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. Typical FDM: +0.3 mm.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "What does the frame carry?",
   "a": "The torch stand and the shroud on the base, and the engine on the spool hanger at the wall."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "sealed-generator-frame-2in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-sealed-generator-frame/sealed-generator-frame-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-sealed-generator-frame/sealed-generator-frame-2in.stl",
   "note": "frame: base 180 × 170 × 8, wall 150 × 10 to 297.6 with a window x ±57 to 233.8, 2 gussets, 2 × Ø5.5 for the hanger bar at 279.6, Ø3.3 (M4 tapped) for the torch stand (2) and the shroud feet (3)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-sealed-generator-frame/index.md"
}