{
 "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-syringe-head",
 "name": "Tri-clamp power head: ISO 2852 cap with a Ø15.9 socket for a 10 mL syringe, 1.5, 2 and 3 in",
 "kind": "hardware",
 "category": "Stirling engines",
 "group": "Tri-clamp engine parts",
 "year": null,
 "question": "How do I mount a syringe as the power cylinder on a tri-clamp Stirling engine?",
 "tags": [
  "tri-clamp",
  "end cap",
  "syringe",
  "power cylinder",
  "stirling",
  "gamma",
  "long earth society"
 ],
 "aliases": [
  "syringe power cylinder stirling",
  "tri clamp cap syringe",
  "10ml syringe stirling head",
  "gamma stirling power head",
  "tri clamp power head"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 3,
 "url": "https://xemstudio.com/objects/tri-clamp-syringe-head/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-syringe-head/sheet.txt",
 "sheet": {
  "basis": "ISO 2852 cap face with a Ø15.9 socket (10 mL syringe barrel OD) and an M5 port (Ø4.2 tap hole)",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "An ISO 2852 end cap carrying a 10 mL syringe barrel as the power cylinder, on centre.",
   "Socket Ø15.9 × 14 deep (floor 8 mm above the face) in a Ø22.9 boss that stands 16 mm off the back of the 6 mm cap; a Ø11.9 port through the floor joins the barrel to the engine.",
   "Opposite side: an M5 port (Ø4.2 tap hole) in a Ø10 boss for a sensor, a vent or a second transfer line.",
   "The 10 mL barrel's 14.5 mm bore sweeps about 2 mL per 12 mm of plunger stroke."
  ],
  "table": {
   "columns": [
    "size_in",
    "flange_od_mm",
    "socket_mm",
    "socket_depth_mm",
    "port_mm",
    "m5_tap_mm",
    "overall_h_mm"
   ],
   "rows": [
    [
     "1.5",
     50.5,
     15.9,
     14,
     11.9,
     4.2,
     22
    ],
    [
     "2",
     64,
     15.9,
     14,
     11.9,
     4.2,
     22
    ],
    [
     "3",
     91,
     15.9,
     14,
     11.9,
     4.2,
     22
    ]
   ]
  }
 },
 "sheet_text": "Tri-clamp power head: ISO 2852 cap with a Ø15.9 socket for a 10 mL syringe, 1.5, 2 and 3 in — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-syringe-head/  (CC BY 4.0)\nBasis: ISO 2852 cap face with a Ø15.9 socket (10 mL syringe barrel OD) and an M5 port (Ø4.2 tap hole)\nCatalog version: 2026-10-20\n\nSizes: see table below\n- An ISO 2852 end cap carrying a 10 mL syringe barrel as the power cylinder, on centre.\n- Socket Ø15.9 × 14 deep (floor 8 mm above the face) in a Ø22.9 boss that stands 16 mm off the back of the 6 mm cap; a Ø11.9 port through the floor joins the barrel to the engine.\n- Opposite side: an M5 port (Ø4.2 tap hole) in a Ø10 boss for a sensor, a vent or a second transfer line.\n- The 10 mL barrel's 14.5 mm bore sweeps about 2 mL per 12 mm of plunger stroke.\n\nsize_in  flange_od_mm  socket_mm  socket_depth_mm  port_mm  m5_tap_mm  overall_h_mm\n1.5  50.5  15.9  14  11.9  4.2  22\n2  64.0  15.9  14  11.9  4.2  22\n3  91.0  15.9  14  11.9  4.2  22\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Long Earth Society: Tri-clamp Stirling engine builds — web, video — LES site — https://longearthsociety.com/engineering/\n- James R. Senft: An Introduction to Low Temperature Differential Stirling Engines (displacer and gap design) — book — Moriya Press [verify license at link] — https://www.stirlingengine.com/\n- Wikipedia: Stirling engine — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Stirling_engine\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/tri-clamp-syringe-head/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-syringe-head\n",
 "sources": [
  {
   "publisher": "Long Earth Society",
   "title": "Tri-clamp Stirling engine builds",
   "url": "https://longearthsociety.com/engineering/",
   "formats": [
    "web",
    "video"
   ],
   "license": "LES site",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "James R. Senft",
   "title": "An Introduction to Low Temperature Differential Stirling Engines (displacer and gap design)",
   "url": "https://www.stirlingengine.com/",
   "formats": [
    "book"
   ],
   "license": "Moriya Press",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Wikipedia",
   "title": "Stirling engine",
   "url": "https://en.wikipedia.org/wiki/Stirling_engine",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "plastic-syringes",
  "syringe-pistons",
  "tri-clamp-displacer-head",
  "tri-clamp-clamps",
  "tri-clamp-spool"
 ],
 "fits": [
  {
   "role": "Goes in or on",
   "items": [
    {
     "slug": "tri-clamp-spool",
     "why": "ISO 2852 face on the spool or tee ferrule"
    }
   ]
  },
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "plastic-syringes",
     "why": "10 mL barrel (Ø15.9) in the socket"
    },
    {
     "slug": "syringe-pistons",
     "why": "piston for the 14.5 mm barrel bore"
    },
    {
     "slug": "tri-clamp-displacer-head",
     "why": "transfer tube from its barb"
    }
   ]
  },
  {
   "role": "Also needed",
   "items": [
    {
     "slug": "tri-clamp-clamps",
     "why": "clamp and gasket on the face"
    }
   ]
  }
 ],
 "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": "syringe socket",
   "exact": "Ø15.9",
   "mates": "10 mL syringe barrel",
   "fit": "socket",
   "files": "head-power-"
  },
  {
   "feature": "head faces",
   "exact": "ISO 2852",
   "mates": "ferrule face + Type B gasket",
   "fit": "clamp",
   "files": "head-"
  },
  {
   "feature": "vent / instrument port",
   "exact": "Ø4.2",
   "mates": "M5 tap drill",
   "fit": "designed",
   "files": "head-power-"
  }
 ],
 "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 I use a syringe as the power cylinder on a tri-clamp engine?",
   "a": "Yes: this head has a Ø15.9 × 14 socket for a 10 mL barrel on centre, with a Ø11.9 port into the engine."
  },
  {
   "q": "How much does a 10 mL syringe sweep?",
   "a": "Its 14.5 mm bore sweeps about 2 mL per 12 mm of stroke."
  },
  {
   "q": "What is the M5 hole for?",
   "a": "An extra port: a sensor, a vent or a second line, Ø4.2 for an M5 thread."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "head-power-syringe-1.5in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-power-syringe-1.5in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-power-syringe-1.5in.stl",
   "note": "1.5 in ISO 2852 cap: socket for a 10 mL syringe barrel (Ø15.9) as the power cylinder, M5 instrument/vent port"
  },
  {
   "file": "head-power-syringe-2in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-power-syringe-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-power-syringe-2in.stl",
   "note": "2 in ISO 2852 cap: socket for a 10 mL syringe barrel (Ø15.9) as the power cylinder, M5 instrument/vent port"
  },
  {
   "file": "head-power-syringe-3in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-power-syringe-3in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-power-syringe-3in.stl",
   "note": "3 in ISO 2852 cap: socket for a 10 mL syringe barrel (Ø15.9) as the power cylinder, M5 instrument/vent port"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-syringe-head/index.md"
}