{
 "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-displacers-and-heads",
 "name": "Tri-clamp displacers and engine heads: 1.5, 2 and 3 in spools",
 "kind": "hardware",
 "category": "Stirling engines",
 "group": "Tri-clamp engine parts",
 "year": null,
 "question": "What size displacer fits a 2 inch tri-clamp spool and what caps do I need to make it a Stirling engine?",
 "tags": [
  "displacer",
  "tri-clamp",
  "engine head",
  "stirling",
  "long earth society",
  "regenerator"
 ],
 "aliases": [
  "tri clamp stirling displacer",
  "2 inch tri clamp stirling engine",
  "displacer for 2 inch spool",
  "tri clamp end cap with rod guide",
  "stirling displacer stl",
  "sanitary spool stirling"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 46,
 "url": "https://xemstudio.com/objects/tri-clamp-displacers-and-heads/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-displacers-and-heads/sheet.txt",
 "sheet": {
  "basis": "16 ga ASME BPE tube bores (1.5 in = 34.8 mm, 2 in = 47.5, 3 in = 72.9) from the tri-clamp spool entry; displacer radial gap 0.6–1.0 mm for low-ΔT air engines (Senft); ISO 2852 cap face from the tri-clamp end cap entry",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Displacer diameter = bore − 2 × gap: 1.5 in → Ø33.6, 2 in → Ø46.0, 3 in → Ø70.9. Length 1.5–2.5 × bore (the longer, the bigger the temperature difference it can hold across itself); stroke 0.3–0.4 × length. A 2 in × 6 in spool takes the Ø46 × 90 displacer with a 30 mm stroke.",
   "Shell displacers: 1 mm wall, closed hot end, internal rings every 25 mm, printed open end up (no supports); the cap presses in and carries the Ø3 rod on an M3 grub. Mass matters less than you think at 2–5 Hz; stiffness and straightness matter more. PETG for a cold end under 80 °C; the hot end of the displacer sees the hot plate only by radiation: PETG survives a tea-light engine, use a foam-and-foil or a thin stainless cup over the nose for a burner engine.",
   "Regenerative (annular-gap) displacer: 1.5 mm gap and 12 slots packed with #100 stainless mesh turn the gap into the regenerator (Senft's LTD trick); use it in a single spool with no separate regenerator section. Foam templates: cut closed-cell foam (EVA, pool noodle) to Ø and length with the cross lines for centring the rod.",
   "Heads (ISO 2852 caps with features on the back, so a stock clamp and gasket seal them): displacer head (3/32 in brass guide tube press-fit on centre + 4 mm barb), power head (10 mL syringe barrel socket, Ø15.9, as the power cylinder + M5 port), instrument head (DS18B20, K-type and a barb), crank head (Ø3 rod gland with an O-ring groove and two 623 towers 24 mm up for a crankshaft right on the cap). Heads print flat, face down, at 0.15 mm layers; sand the sealing land.",
   "Engine recipes: Gamma, 2 in: hot ferrule + 6 in spool + displacer head on top, Ø46 × 90 shell displacer, power head with a 10 mL syringe on a side tee or the crank head; flywheel Ø100 on the crank kit. Beta: one spool, regenerative displacer, crank head on the cold end. Free-piston: 2 in spool, Ø46 displacer on the spiral flexures, power piston from the free-piston core.",
   "LES: this is the shelf the LES engines are literally built from; every head here replaces a flat cap that used to be drilled by hand."
  ],
  "table": {
   "columns": [
    "spool",
    "bore_mm",
    "displacer_od_mm",
    "length_mm",
    "radial_gap_mm",
    "type"
   ],
   "rows": [
    [
     "1.5",
     34.800000000000004,
     33.6,
     50,
     0.6,
     "shell / foam"
    ],
    [
     "1.5",
     34.800000000000004,
     33.6,
     75,
     0.6,
     "shell / foam"
    ],
    [
     "1.5",
     34.800000000000004,
     33.6,
     100,
     0.6,
     "shell / foam"
    ],
    [
     "2",
     47.5,
     46,
     60,
     0.75,
     "shell / foam"
    ],
    [
     "2",
     47.5,
     46,
     90,
     0.75,
     "shell / foam"
    ],
    [
     "2",
     47.5,
     46,
     120,
     0.75,
     "shell / foam"
    ],
    [
     "3",
     72.9,
     70.9,
     80,
     1,
     "shell / foam"
    ],
    [
     "3",
     72.9,
     70.9,
     120,
     1,
     "shell / foam"
    ],
    [
     "3",
     72.9,
     70.9,
     160,
     1,
     "shell / foam"
    ]
   ]
  }
 },
 "sheet_text": "Tri-clamp displacers and engine heads: 1.5, 2 and 3 in spools — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-displacers-and-heads/  (CC BY 4.0)\nBasis: 16 ga ASME BPE tube bores (1.5 in = 34.8 mm, 2 in = 47.5, 3 in = 72.9) from the tri-clamp spool entry; displacer radial gap 0.6–1.0 mm for low-ΔT air engines (Senft); ISO 2852 cap face from the tri-clamp end cap entry\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Displacer diameter = bore − 2 × gap: 1.5 in → Ø33.6, 2 in → Ø46.0, 3 in → Ø70.9. Length 1.5–2.5 × bore (the longer, the bigger the temperature difference it can hold across itself); stroke 0.3–0.4 × length. A 2 in × 6 in spool takes the Ø46 × 90 displacer with a 30 mm stroke.\n- Shell displacers: 1 mm wall, closed hot end, internal rings every 25 mm, printed open end up (no supports); the cap presses in and carries the Ø3 rod on an M3 grub. Mass matters less than you think at 2–5 Hz; stiffness and straightness matter more. PETG for a cold end under 80 °C; the hot end of the displacer sees the hot plate only by radiation: PETG survives a tea-light engine, use a foam-and-foil or a thin stainless cup over the nose for a burner engine.\n- Regenerative (annular-gap) displacer: 1.5 mm gap and 12 slots packed with #100 stainless mesh turn the gap into the regenerator (Senft's LTD trick); use it in a single spool with no separate regenerator section. Foam templates: cut closed-cell foam (EVA, pool noodle) to Ø and length with the cross lines for centring the rod.\n- Heads (ISO 2852 caps with features on the back, so a stock clamp and gasket seal them): displacer head (3/32 in brass guide tube press-fit on centre + 4 mm barb), power head (10 mL syringe barrel socket, Ø15.9, as the power cylinder + M5 port), instrument head (DS18B20, K-type and a barb), crank head (Ø3 rod gland with an O-ring groove and two 623 towers 24 mm up for a crankshaft right on the cap). Heads print flat, face down, at 0.15 mm layers; sand the sealing land.\n- Engine recipes: Gamma, 2 in: hot ferrule + 6 in spool + displacer head on top, Ø46 × 90 shell displacer, power head with a 10 mL syringe on a side tee or the crank head; flywheel Ø100 on the crank kit. Beta: one spool, regenerative displacer, crank head on the cold end. Free-piston: 2 in spool, Ø46 displacer on the spiral flexures, power piston from the free-piston core.\n- LES: this is the shelf the LES engines are literally built from; every head here replaces a flat cap that used to be drilled by hand.\n\nspool  bore_mm  displacer_od_mm  length_mm  radial_gap_mm  type\n1.5  34.800000000000004  33.6  50  0.6  shell / foam\n1.5  34.800000000000004  33.6  75  0.6  shell / foam\n1.5  34.800000000000004  33.6  100  0.6  shell / foam\n2  47.5  46.0  60  0.75  shell / foam\n2  47.5  46.0  90  0.75  shell / foam\n2  47.5  46.0  120  0.75  shell / foam\n3  72.9  70.9  80  1.0  shell / foam\n3  72.9  70.9  120  1.0  shell / foam\n3  72.9  70.9  160  1.0  shell / foam\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, 46 parts): https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-displacers-and-heads\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": [
  "tri-clamp-spool",
  "tri-clamp-end-cap",
  "tri-clamp-ferrule",
  "plastic-syringes",
  "brass-tube-ks",
  "crank-conrod-flywheel-kit",
  "regenerator-and-heat-materials",
  "spiral-flexure-bearings",
  "free-piston-core",
  "instrument-mounts",
  "o-rings-metric",
  "ball-bearings-metric"
 ],
 "faq": [
  {
   "q": "What diameter displacer for a 2 inch tri-clamp spool?",
   "a": "Ø46 mm (47.5 mm bore minus a 0.75 mm radial gap), 60–120 mm long; the Ø46 × 90 shell with a 30 mm stroke suits a 6 in spool."
  },
  {
   "q": "How much clearance should a Stirling displacer have?",
   "a": "0.5–1 mm radial for a low-temperature air engine: 0.6 mm in a 1.5 in spool, 0.75 in a 2 in, 1.0 in a 3 in. Wider wastes the temperature difference, tighter rubs when the shell warms."
  },
  {
   "q": "How do I seal the displacer rod through a tri-clamp cap?",
   "a": "Print the crank head: a Ø3.1 bore with a 1.5 mm cross-section O-ring groove 5 mm up; a light smear of silicone grease and the Ø3 rod runs sealed. The displacer head instead uses a 3/32 in brass tube as a guide (no seal needed on the displacer side of a gamma engine)."
  },
  {
   "q": "Can I use a syringe as the power piston on a tri-clamp engine?",
   "a": "Yes: the power head has a Ø15.9 socket for a 10 mL syringe barrel; the plunger (tip removed) is the piston. For a 2 in engine that gives about 2 mL of swept volume per 12 mm of stroke, which matches a Ø46 × 90 displacer at 30 mm stroke."
  },
  {
   "q": "What is a regenerative displacer?",
   "a": "A displacer whose wall gap is the regenerator: slots in the shell packed with stainless mesh, 1.5 mm gap; the gas shuttles through the mesh as the displacer moves, so one spool makes a complete engine (Senft's LTD design)."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "displacer-shell-1.5in-50",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-1.5in-50.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-1.5in-50.stl",
   "note": "1.5 in shell displacer Ø33.6 × 50 for the Ø34.8 bore (0.6 mm radial gap), 1 mm wall, ribbed; print open end up, 0.8 mm nozzle-friendly"
  },
  {
   "file": "displacer-cap-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/displacer-cap-1.5in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-cap-1.5in.stl",
   "note": "1.5 in displacer end cap with Ø3 rod boss and M3 grub (print one per displacer)"
  },
  {
   "file": "displacer-foam-template-1.5in-50",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-1.5in-50.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-1.5in-50.stl",
   "note": "1.5 in foam displacer cutting template Ø33.6 × 50 with centre and cross lines"
  },
  {
   "file": "displacer-shell-1.5in-75",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-1.5in-75.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-1.5in-75.stl",
   "note": "1.5 in shell displacer Ø33.6 × 75 for the Ø34.8 bore (0.6 mm radial gap), 1 mm wall, ribbed; print open end up, 0.8 mm nozzle-friendly"
  },
  {
   "file": "displacer-cap-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/displacer-cap-1.5in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-cap-1.5in.stl",
   "note": "1.5 in displacer end cap with Ø3 rod boss and M3 grub (print one per displacer)"
  },
  {
   "file": "displacer-foam-template-1.5in-75",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-1.5in-75.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-1.5in-75.stl",
   "note": "1.5 in foam displacer cutting template Ø33.6 × 75 with centre and cross lines"
  },
  {
   "file": "displacer-shell-1.5in-100",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-1.5in-100.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-1.5in-100.stl",
   "note": "1.5 in shell displacer Ø33.6 × 100 for the Ø34.8 bore (0.6 mm radial gap), 1 mm wall, ribbed; print open end up, 0.8 mm nozzle-friendly"
  },
  {
   "file": "displacer-cap-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/displacer-cap-1.5in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-cap-1.5in.stl",
   "note": "1.5 in displacer end cap with Ø3 rod boss and M3 grub (print one per displacer)"
  },
  {
   "file": "displacer-foam-template-1.5in-100",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-1.5in-100.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-1.5in-100.stl",
   "note": "1.5 in foam displacer cutting template Ø33.6 × 100 with centre and cross lines"
  },
  {
   "file": "displacer-regenerative-1.5in-75",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-regenerative-1.5in-75.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-regenerative-1.5in-75.stl",
   "note": "1.5 in annular-gap regenerative displacer Ø31.8 × 75: 12 radial slots to pack with #100 mesh, 1.5 mm gap"
  },
  {
   "file": "displacer-regenerative-cap-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/displacer-regenerative-cap-1.5in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-regenerative-cap-1.5in.stl",
   "note": "cap for the 1.5 in regenerative displacer"
  },
  {
   "file": "head-displacer-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-displacer-1.5in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-displacer-1.5in.stl",
   "note": "1.5 in ISO 2852 cap: centre press-fit bore for 3/32 in brass guide tube, 4 mm transfer-port barb"
  },
  {
   "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-instrument-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-instrument-1.5in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-instrument-1.5in.stl",
   "note": "1.5 in ISO 2852 cap: Ø6.15 DS18B20, Ø3.15 K-type, 4.2 barb port, M3 pinch screws"
  },
  {
   "file": "head-crank-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-crank-1.5in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-crank-1.5in.stl",
   "note": "1.5 in ISO 2852 cap: Ø3 rod gland with 1.5 CS O-ring groove and two 623 bearing towers for a Ø3 crankshaft 24 mm above the cap"
  },
  {
   "file": "displacer-shell-2in-60",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-2in-60.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-2in-60.stl",
   "note": "2 in shell displacer Ø46 × 60 for the Ø47.5 bore (0.75 mm radial gap), 1 mm wall, ribbed; print open end up, 0.8 mm nozzle-friendly"
  },
  {
   "file": "displacer-cap-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/displacer-cap-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-cap-2in.stl",
   "note": "2 in displacer end cap with Ø3 rod boss and M3 grub (print one per displacer)"
  },
  {
   "file": "displacer-foam-template-2in-60",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-2in-60.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-2in-60.stl",
   "note": "2 in foam displacer cutting template Ø46 × 60 with centre and cross lines"
  },
  {
   "file": "displacer-shell-2in-90",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-2in-90.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-2in-90.stl",
   "note": "2 in shell displacer Ø46 × 90 for the Ø47.5 bore (0.75 mm radial gap), 1 mm wall, ribbed; print open end up, 0.8 mm nozzle-friendly"
  },
  {
   "file": "displacer-cap-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/displacer-cap-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-cap-2in.stl",
   "note": "2 in displacer end cap with Ø3 rod boss and M3 grub (print one per displacer)"
  },
  {
   "file": "displacer-foam-template-2in-90",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-2in-90.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-2in-90.stl",
   "note": "2 in foam displacer cutting template Ø46 × 90 with centre and cross lines"
  },
  {
   "file": "displacer-shell-2in-120",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-2in-120.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-2in-120.stl",
   "note": "2 in shell displacer Ø46 × 120 for the Ø47.5 bore (0.75 mm radial gap), 1 mm wall, ribbed; print open end up, 0.8 mm nozzle-friendly"
  },
  {
   "file": "displacer-cap-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/displacer-cap-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-cap-2in.stl",
   "note": "2 in displacer end cap with Ø3 rod boss and M3 grub (print one per displacer)"
  },
  {
   "file": "displacer-foam-template-2in-120",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-2in-120.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-2in-120.stl",
   "note": "2 in foam displacer cutting template Ø46 × 120 with centre and cross lines"
  },
  {
   "file": "displacer-regenerative-2in-90",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-regenerative-2in-90.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-regenerative-2in-90.stl",
   "note": "2 in annular-gap regenerative displacer Ø44.5 × 90: 12 radial slots to pack with #100 mesh, 1.5 mm gap"
  },
  {
   "file": "displacer-regenerative-cap-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/displacer-regenerative-cap-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-regenerative-cap-2in.stl",
   "note": "cap for the 2 in regenerative displacer"
  },
  {
   "file": "head-displacer-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-displacer-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-displacer-2in.stl",
   "note": "2 in ISO 2852 cap: centre press-fit bore for 3/32 in brass guide tube, 4 mm transfer-port barb"
  },
  {
   "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-instrument-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-instrument-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-instrument-2in.stl",
   "note": "2 in ISO 2852 cap: Ø6.15 DS18B20, Ø3.15 K-type, 4.2 barb port, M3 pinch screws"
  },
  {
   "file": "head-crank-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-crank-2in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-crank-2in.stl",
   "note": "2 in ISO 2852 cap: Ø3 rod gland with 1.5 CS O-ring groove and two 623 bearing towers for a Ø3 crankshaft 24 mm above the cap"
  },
  {
   "file": "displacer-shell-3in-80",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-3in-80.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-3in-80.stl",
   "note": "3 in shell displacer Ø70.9 × 80 for the Ø72.9 bore (1.0 mm radial gap), 1 mm wall, ribbed; print open end up, 0.8 mm nozzle-friendly"
  },
  {
   "file": "displacer-cap-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/displacer-cap-3in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-cap-3in.stl",
   "note": "3 in displacer end cap with Ø3 rod boss and M3 grub (print one per displacer)"
  },
  {
   "file": "displacer-foam-template-3in-80",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-3in-80.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-3in-80.stl",
   "note": "3 in foam displacer cutting template Ø70.9 × 80 with centre and cross lines"
  },
  {
   "file": "displacer-shell-3in-120",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-3in-120.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-3in-120.stl",
   "note": "3 in shell displacer Ø70.9 × 120 for the Ø72.9 bore (1.0 mm radial gap), 1 mm wall, ribbed; print open end up, 0.8 mm nozzle-friendly"
  },
  {
   "file": "displacer-cap-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/displacer-cap-3in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-cap-3in.stl",
   "note": "3 in displacer end cap with Ø3 rod boss and M3 grub (print one per displacer)"
  },
  {
   "file": "displacer-foam-template-3in-120",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-3in-120.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-3in-120.stl",
   "note": "3 in foam displacer cutting template Ø70.9 × 120 with centre and cross lines"
  },
  {
   "file": "displacer-shell-3in-160",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-3in-160.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-shell-3in-160.stl",
   "note": "3 in shell displacer Ø70.9 × 160 for the Ø72.9 bore (1.0 mm radial gap), 1 mm wall, ribbed; print open end up, 0.8 mm nozzle-friendly"
  },
  {
   "file": "displacer-cap-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/displacer-cap-3in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-cap-3in.stl",
   "note": "3 in displacer end cap with Ø3 rod boss and M3 grub (print one per displacer)"
  },
  {
   "file": "displacer-foam-template-3in-160",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-3in-160.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-foam-template-3in-160.stl",
   "note": "3 in foam displacer cutting template Ø70.9 × 160 with centre and cross lines"
  },
  {
   "file": "displacer-regenerative-3in-120",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-regenerative-3in-120.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-regenerative-3in-120.stl",
   "note": "3 in annular-gap regenerative displacer Ø69.9 × 120: 12 radial slots to pack with #100 mesh, 1.5 mm gap"
  },
  {
   "file": "displacer-regenerative-cap-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/displacer-regenerative-cap-3in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/displacer-regenerative-cap-3in.stl",
   "note": "cap for the 3 in regenerative displacer"
  },
  {
   "file": "head-displacer-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-displacer-3in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-displacer-3in.stl",
   "note": "3 in ISO 2852 cap: centre press-fit bore for 3/32 in brass guide tube, 4 mm transfer-port barb"
  },
  {
   "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"
  },
  {
   "file": "head-instrument-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-instrument-3in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-instrument-3in.stl",
   "note": "3 in ISO 2852 cap: Ø6.15 DS18B20, Ø3.15 K-type, 4.2 barb port, M3 pinch screws"
  },
  {
   "file": "head-crank-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-crank-3in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/head-crank-3in.stl",
   "note": "3 in ISO 2852 cap: Ø3 rod gland with 1.5 CS O-ring groove and two 623 bearing towers for a Ø3 crankshaft 24 mm above the cap"
  },
  {
   "file": "rod-gland-bushing-3mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/rod-gland-bushing-3mm.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-displacers-and-heads/rod-gland-bushing-3mm.stl",
   "note": "stand-alone rod gland bushing Ø3 with O-ring groove, press into a Ø8.1 hole"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-displacers-and-heads/index.md"
}