{
 "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-horizontal-gamma-frame",
 "name": "Frame for the horizontal tri-clamp gamma",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Stirling & thermoacoustic",
 "year": null,
 "question": "What frame holds a horizontal two-cylinder tri-clamp Stirling?",
 "tags": [
  "frame",
  "stand",
  "tri-clamp",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "horizontal 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-horizontal-gamma-frame/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-horizontal-gamma-frame/sheet.txt",
 "sheet": {
  "basis": "Design values",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "One base with everything the engine stands on: a cradle under the water jacket, two pedestals for spool hangers on the power cylinder and bounce spool, the displacer-rod guide, and two uprights with the crank's 608 bearings."
  ],
  "table": {
   "columns": [
    "feature",
    "value"
   ],
   "rows": [
    [
     "base",
     "800 × 250 × 8"
    ],
    [
     "axis height",
     "138 above the bench"
    ],
    [
     "crank axis",
     "x 487.5"
    ]
   ]
  }
 },
 "sheet_text": "Frame for the horizontal tri-clamp gamma — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-horizontal-gamma-frame/  (CC BY 4.0)\nBasis: Design values\nCatalog version: 2026-10-20\n\nSizes: see table below\n- One base with everything the engine stands on: a cradle under the water jacket, two pedestals for spool hangers on the power cylinder and bounce spool, the displacer-rod guide, and two uprights with the crank's 608 bearings.\n\nfeature  value\nbase  800 × 250 × 8\naxis height  138 above the bench\ncrank axis  x 487.5\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\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-horizontal-gamma-frame/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-horizontal-gamma-frame\n",
 "sources": [
  {
   "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-horizontal-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": "crank uprights",
   "exact": "Ø22 × 7 pockets",
   "mates": "608 bearing OD",
   "fit": "press",
   "files": "all"
  },
  {
   "feature": "guide block",
   "exact": "Ø10 × 10",
   "mates": "6 × 10 × 10 sleeve bushing",
   "fit": "press",
   "files": "all"
  },
  {
   "feature": "cradle",
   "exact": "Ø50.8 seat",
   "mates": "hot-spool tube OD",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "tapped holes",
   "exact": "M5 Ø4.2 × 15, M4 Ø3.3, M3 bracket Ø3.4 + 90° countersink",
   "mates": "hanger bars, torch stand, shroud, generator",
   "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": "How high are the cylinders?",
   "a": "138 mm above the bench: the Ø200 flywheel clears the base by 30."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "horizontal-gamma-frame-2in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-horizontal-gamma-frame/horizontal-gamma-frame-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-horizontal-gamma-frame/horizontal-gamma-frame-2in.stl",
   "note": "horizontal gamma frame: base 800 × 250 × 8, jacket cradle, two hanger pedestals (M5 tapped), displacer-rod guide block (Ø10 seat), two crank uprights with 608 pockets, torch-stand and shroud holes (M4 tapped)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-horizontal-gamma-frame/index.md"
}