{
 "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-split-burner-shroud",
 "name": "Split burner shroud for a vertical 2 in tri-clamp hot end",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Stirling & thermoacoustic",
 "year": null,
 "question": "How do I keep a burner flame on a vertical tri-clamp hot end?",
 "tags": [
  "shroud",
  "burner",
  "torch",
  "tri-clamp",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "burner shroud tri clamp",
  "split shroud hot end"
 ],
 "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-split-burner-shroud/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-split-burner-shroud/sheet.txt",
 "sheet": {
  "basis": "Design values: shell 6 mm outside the Ø76 fins, open bottom over the torch stand, lid clamped on the tube",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Two halves that clamp the hot spool's tube with their lids (2 × M4 × 20) just above the fins and hang round them, open at the bottom: the torch or burner below fires up into it, the gas leaves through six windows under the lid.",
   "It touches only the tube at the lid. The heat source is the builder's choice: a propane or butane torch head in the torch stand, or a small gas burner firing into the open bottom."
  ],
  "table": {
   "columns": [
    "feature",
    "value"
   ],
   "rows": [
    [
     "shell",
     "r 44–46"
    ],
    [
     "span",
     "−12 to 82.5 above the hot end"
    ],
    [
     "lid",
     "clamps Ø50.8"
    ]
   ]
  }
 },
 "sheet_text": "Split burner shroud for a vertical 2 in tri-clamp hot end — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-split-burner-shroud/  (CC BY 4.0)\nBasis: Design values: shell 6 mm outside the Ø76 fins, open bottom over the torch stand, lid clamped on the tube\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Two halves that clamp the hot spool's tube with their lids (2 × M4 × 20) just above the fins and hang round them, open at the bottom: the torch or burner below fires up into it, the gas leaves through six windows under the lid.\n- It touches only the tube at the lid. The heat source is the builder's choice: a propane or butane torch head in the torch stand, or a small gas burner firing into the open bottom.\n\nfeature  value\nshell  r 44–46\nspan  −12 to 82.5 above the hot end\nlid  clamps Ø50.8\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-split-burner-shroud/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-split-burner-shroud\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": [
  "tri-clamp-closed-end-spool",
  "tri-clamp-hot-end-fin-sleeve",
  "tri-clamp-torch-stand",
  "list-fpse-generator-2in"
 ],
 "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": "lid bore",
   "exact": "Ø50.8",
   "mates": "hot spool tube OD",
   "fit": "clamp",
   "files": "all"
  },
  {
   "feature": "split",
   "exact": "1.0 total (0.5 per half)",
   "mates": "the other half",
   "fit": "clamp",
   "files": "all"
  },
  {
   "feature": "ear holes",
   "exact": "Ø4.5",
   "mates": "M4 clearance (ISO 273 medium)",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "shell",
   "exact": "r 44–46",
   "mates": "fins and flame (no contact)",
   "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": "Does it carry the engine?",
   "a": "No: the hangers do."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "shroud-half-2in-split",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-split-burner-shroud/shroud-half-2in-split.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-split-burner-shroud/shroud-half-2in-split.stl",
   "note": "shroud half: shell r 44–46 from 12 below the hot end to the lid, lid clamps the tube 76.5–82.5, 3 exhaust windows, ears with one M4"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-split-burner-shroud/index.md"
}