{
 "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": "tube-hanger-post",
 "name": "Hanger post: holds a spool hanger round a horizontal 2 in tube",
 "kind": "hardware",
 "category": "Stirling engines",
 "group": "Tri-clamp engine parts",
 "year": null,
 "question": "How do I support a horizontal tri-clamp spool off the bench?",
 "tags": [
  "stand",
  "post",
  "hanger",
  "tri-clamp",
  "long earth society",
  "thermoacoustic"
 ],
 "aliases": [
  "horizontal tube support post",
  "spool hanger post"
 ],
 "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/tube-hanger-post/",
 "sheet_txt": "https://xemstudio.com/objects/tube-hanger-post/sheet.txt",
 "sheet": {
  "basis": "Hole spacing = the 2 in spool hanger's bar holes (±39.4); bar face 39.4 from the tube axis",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "An upright plate with a foot: the spool hanger's bar bolts to its face with two M5 × 16 into tapped holes 78.8 apart, the hanger turned so its ring stands vertical round a horizontal tube with its axis 235.3 above the bench.",
   "On the twin-piston engine one post sits under each bounce spool."
  ],
  "table": {
   "columns": [
    "feature",
    "value"
   ],
   "rows": [
    [
     "axis height",
     "235.3"
    ],
    [
     "holes",
     "2 × M5 tapped, 78.8 apart"
    ]
   ]
  }
 },
 "sheet_text": "Hanger post: holds a spool hanger round a horizontal 2 in tube — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tube-hanger-post/  (CC BY 4.0)\nBasis: Hole spacing = the 2 in spool hanger's bar holes (±39.4); bar face 39.4 from the tube axis\nCatalog version: 2026-10-20\n\nSizes: see table below\n- An upright plate with a foot: the spool hanger's bar bolts to its face with two M5 × 16 into tapped holes 78.8 apart, the hanger turned so its ring stands vertical round a horizontal tube with its axis 235.3 above the bench.\n- On the twin-piston engine one post sits under each bounce spool.\n\nfeature  value\naxis height  235.3\nholes  2 × M5 tapped, 78.8 apart\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Xem Studio: tools/gen_ta_power.py: the network model and every dimension on this page — code — CC BY 4.0 — https://xemstudio.com/\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/tube-hanger-post/index.json\nAPI: https://xemstudio.com/api/geometry?object=tube-hanger-post\n",
 "sources": [
  {
   "publisher": "Xem Studio",
   "title": "tools/gen_ta_power.py: the network model and every dimension on this page",
   "url": "https://xemstudio.com/",
   "formats": [
    "code"
   ],
   "license": "CC BY 4.0",
   "license_verified": true,
   "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": [
  "spool-hanger-collars",
  "list-ta-twin-piston-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": "bar face",
   "exact": "flat, 39.4 from the tube axis",
   "mates": "spool hanger bar",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "holes",
   "exact": "2 × Ø4.2 (M5 tap drill) 78.8 apart",
   "mates": "shcs-m5x16 through the 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": "Can it hold a vertical tube?",
   "a": "Use the 2020 stand for that; the post is for horizontal spools."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "hanger-post-2in-h235.3",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tube-hanger-post/hanger-post-2in-h235.3.step",
   "stl": "https://xemstudio.com/files/hardware/tube-hanger-post/hanger-post-2in-h235.3.stl",
   "note": "post for a horizontal 2 in tube at 235.3: plate 30 × 8 × 290.3, foot 30 × 58 × 6, 2 × M5 tap drill Ø4.2 at ±39.4 about the tube axis"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tube-hanger-post/index.md"
}