{
 "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-rod-gland-cap",
 "name": "2 in end cap with a bored boss for two 8 × 12 × 20 sleeve bushings (piston-rod gland)",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Stirling & thermoacoustic",
 "year": null,
 "question": "How do I take a piston rod out of a charged tri-clamp cylinder?",
 "tags": [
  "cap",
  "gland",
  "rod seal",
  "custom cap",
  "tri-clamp",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "tri clamp rod gland",
  "end cap with bushing boss"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 2,
 "url": "https://xemstudio.com/objects/tri-clamp-rod-gland-cap/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-rod-gland-cap/sheet.txt",
 "sheet": {
  "basis": "ISO 2852 2 in face; bushing size from its standard; boss length is a design value",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "A 2 in end cap with a bored boss: two 8 × 12 × 20 sleeve bushings 36 mm apart guide the Ø8 piston rod and are its gland. The rod's side load from the con-rod is taken here, so the piston in the bore carries none."
  ],
  "table": {
   "columns": [
    "feature",
    "value"
   ],
   "rows": [
    [
     "face",
     "ISO 2852 2 in"
    ],
    [
     "boss",
     "Ø24, to 62 from the face"
    ],
    [
     "seat",
     "Ø12, z 6–62"
    ]
   ]
  }
 },
 "sheet_text": "2 in end cap with a bored boss for two 8 × 12 × 20 sleeve bushings (piston-rod gland) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-rod-gland-cap/  (CC BY 4.0)\nBasis: ISO 2852 2 in face; bushing size from its standard; boss length is a design value\nCatalog version: 2026-10-20\n\nSizes: see table below\n- A 2 in end cap with a bored boss: two 8 × 12 × 20 sleeve bushings 36 mm apart guide the Ø8 piston rod and are its gland. The rod's side load from the con-rod is taken here, so the piston in the bore carries none.\n\nfeature  value\nface  ISO 2852 2 in\nboss  Ø24, to 62 from the face\nseat  Ø12, z 6–62\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ISO (via iTeh sample): ISO 2852 clamp liners: face profile and flange / groove diameters — PDF — standard excerpt; dimensions are facts — https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf\n- ASME: BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall) — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment\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, 2 parts): https://xemstudio.com/files/hardware/tri-clamp-rod-gland-cap/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-rod-gland-cap\n",
 "sources": [
  {
   "publisher": "ISO (via iTeh sample)",
   "title": "ISO 2852 clamp liners: face profile and flange / groove diameters",
   "url": "https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf",
   "formats": [
    "PDF"
   ],
   "license": "standard excerpt; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "ASME",
   "title": "BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall)",
   "url": "https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment",
   "formats": [
    "standard"
   ],
   "license": "ASME; 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": [
  "tri-clamp-spool-npt-bosses",
  "stirling-precision-rods",
  "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": "face",
   "exact": "ISO 2852 2 in",
   "mates": "Type B gasket, 2 in clamp",
   "fit": "clamp",
   "files": "all"
  },
  {
   "feature": "gland seat",
   "exact": "Ø12, z 6–62",
   "mates": "two 8 × 12 × 20 sleeve bushings",
   "fit": "press",
   "files": "gland-cap-2in-2x-8x12x20"
  },
  {
   "feature": "gland seat",
   "exact": "Ø10, z 6–62",
   "mates": "two 6 × 10 × 10 sleeve bushings",
   "fit": "press",
   "files": "gland-cap-2in-2x-6x10x10"
  },
  {
   "feature": "port bosses",
   "exact": "3 × 1/4-18 NPT on r 17, tap drill Ø11.1 × 12",
   "mates": "fill valve, gauge, relief valve",
   "fit": "designed",
   "files": "gland-cap-2in-2x-6x10x10"
  }
 ],
 "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 leak?",
   "a": "A close-running gland always leaks a little: at 5 bar gauge about 10.1 mL/min at 5 µm radial clearance, 81 mL/min at 10 µm (at the gland's pressure)."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "gland-cap-2in-2x-8x12x20",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-rod-gland-cap/gland-cap-2in-2x-8x12x20.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-rod-gland-cap/gland-cap-2in-2x-8x12x20.stl",
   "note": "2 in rod-gland cap: ISO 2852 face, body Ø50.8 to 12, boss Ø24 to 62, Ø12 seat z 6–62 for two 8 × 12 × 20 bushings (6–26, 42–62), Ø9 below"
  },
  {
   "file": "gland-cap-2in-2x-6x10x10-3x-npt14",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-rod-gland-cap/gland-cap-2in-2x-6x10x10-3x-npt14.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-rod-gland-cap/gland-cap-2in-2x-6x10x10-3x-npt14.stl",
   "note": "2 in rod-gland cap for a Ø6 rod: ISO 2852 face, body Ø50.8 to 12, boss Ø22 to 62, Ø10 seat z 6–62 for two 6 × 10 × 10 bushings (6–16, 52–62), three 1/4 NPT bosses on its back on r 17"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-rod-gland-cap/index.md"
}