{
 "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-diaphragm-gamma-frame",
 "name": "Frame for the 2 in tri-clamp tee diaphragm gamma",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Stirling & thermoacoustic",
 "year": null,
 "question": "What holds the tri-clamp diaphragm gamma together?",
 "tags": [
  "frame",
  "gamma",
  "tri-clamp",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "tri clamp gamma frame",
  "diaphragm stirling 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-diaphragm-gamma-frame/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-diaphragm-gamma-frame/sheet.txt",
 "sheet": {
  "basis": "Positions from the engine layout (tools/gen_diaphragm.py gamma_layout); ISO 273 medium clearance for M3",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "One piece: a base plate, a ring that stands the hot cap 17.5 mm above a tea light (windows let the air in), a tower behind the engine, a shelf for the two crank stands and a bracket for the beam pivot post.",
   "Crank axis 208.0 above the base and 100 mm from the column axis, beam pivot 380.1 above the base."
  ],
  "table": {
   "columns": [
    "feature",
    "value"
   ],
   "rows": [
    [
     "base",
     "210 × 200 × 8"
    ],
    [
     "column ring",
     "Ø50 / Ø42 × 33.5"
    ],
    [
     "shelf top",
     148
    ],
    [
     "bracket top",
     326.1
    ]
   ]
  }
 },
 "sheet_text": "Frame for the 2 in tri-clamp tee diaphragm gamma — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-diaphragm-gamma-frame/  (CC BY 4.0)\nBasis: Positions from the engine layout (tools/gen_diaphragm.py gamma_layout); ISO 273 medium clearance for M3\nCatalog version: 2026-10-20\n\nSizes: see table below\n- One piece: a base plate, a ring that stands the hot cap 17.5 mm above a tea light (windows let the air in), a tower behind the engine, a shelf for the two crank stands and a bracket for the beam pivot post.\n- Crank axis 208.0 above the base and 100 mm from the column axis, beam pivot 380.1 above the base.\n\nfeature  value\nbase  210 × 200 × 8\ncolumn ring  Ø50 / Ø42 × 33.5\nshelf top  148.0\nbracket top  326.1\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-diaphragm-gamma-frame/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-diaphragm-gamma-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-tee-diaphragm-gamma"
 ],
 "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": "column ring",
   "exact": "Ø42 / Ø50 × 33.5",
   "mates": "back of the 2 in hot cap",
   "fit": "designed",
   "files": "gamma-frame-"
  },
  {
   "feature": "shelf and bracket holes",
   "exact": "Ø3.4",
   "mates": "M3 clearance (ISO 273 medium)",
   "fit": "designed",
   "files": "gamma-frame-"
  }
 ],
 "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 column (on the ring), the crank stands (on the shelf) and the beam pivot post (on the bracket)."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "gamma-frame-2in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-diaphragm-gamma-frame/gamma-frame-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-diaphragm-gamma-frame/gamma-frame-2in.stl",
   "note": "frame for the 2 in tee diaphragm gamma: base 210 × 200 × 8, column ring Ø50 / Ø42 × 33.5 under the hot cap, tower to 326.1, crank-stand shelf at 148.0, pivot-post bracket at 326.1"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-diaphragm-gamma-frame/index.md"
}