{
 "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": "list-tri-clamp-tee-diaphragm-gamma",
 "name": "Build list: Tri-clamp tee diaphragm gamma, 2 in",
 "kind": "list",
 "category": "Stirling engines",
 "group": "Guide",
 "year": null,
 "question": "What parts do I need to build a Tri-clamp tee diaphragm gamma, 2 in?",
 "tags": [
  "list",
  "build",
  "stirling",
  "long earth society",
  "tri-clamp",
  "diaphragm",
  "gamma",
  "tea light"
 ],
 "aliases": [
  "tri clamp diaphragm stirling",
  "tea light gamma stirling tri clamp",
  "diaphragm gamma stirling engine",
  "tri clamp stirling build list"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": true,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/list-tri-clamp-tee-diaphragm-gamma/",
 "sheet_txt": "https://xemstudio.com/objects/list-tri-clamp-tee-diaphragm-gamma/sheet.txt",
 "sheet": {
  "basis": "Every part is a free STEP/STL on this site or a standard part with its own page; quantities are the full count, every screw, nut, pin, gasket and clamp.",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "A tea-light gamma in 2 in tri-clamp: displacer in a 3 in spool, a short-outlet tee with a diaphragm head as the power piston, a rocker beam and one crank pin at 90°.",
   "Numbers: Ø46 × 120 displacer at 15 mm stroke · 2 in diaphragm at 15 mm: 14.2 mL swept · dead volume 118 mL with the filler (289 without) · swept / dead 0.120"
  ],
  "table": {
   "columns": [
    "subsystem",
    "object",
    "parts",
    "qty",
    "note"
   ],
   "rows": [
    [
     null,
     "tri-clamp-diaphragm-gamma-frame",
     "gamma-frame-2in",
     1,
     "base, column ring, tower, crank shelf, pivot bracket"
    ],
    [
     null,
     "tea-light-candles",
     "tea-light-38x16",
     1,
     "inside the column ring, 17.5 below the hot cap"
    ],
    [
     null,
     "tri-clamp-end-cap",
     "tc-cap-2in-flat",
     1,
     "hot end, face up on the column ring"
    ],
    [
     null,
     "tri-clamp-hot-gasket",
     "hot-gasket-2in",
     1,
     "hot joint"
    ],
    [
     null,
     "tri-clamp-heat-shield",
     "heat-shield-2in",
     1,
     "on the spool above the hot clamp"
    ],
    [
     null,
     "tri-clamp-spool",
     "tc-spool-2in-3in",
     1,
     "displacer cylinder, Ø47.5 bore"
    ],
    [
     null,
     "tri-clamp-gasket",
     "tc-gasket-2in",
     2,
     "spool–tee and tee–head joints"
    ],
    [
     null,
     "sanitary-clamp-tees",
     "tee-short-2in",
     1,
     "short-outlet tee, run vertical, branch to the diaphragm"
    ],
    [
     null,
     "tri-clamp-displacer-head",
     "head-displacer-2in",
     1,
     "top: Ø3 rod guide; its barb is plugged"
    ],
    [
     null,
     "silicone-tube",
     "silicone-tube-4x6-50",
     1,
     "on the head barb, closed by the dowel"
    ],
    [
     null,
     "dowel-pins-metric",
     "dowel-4x12",
     1,
     "plug in the silicone tube"
    ],
    [
     null,
     "tri-clamp-volume-filler",
     "plug-tee-2in-rod-106.55",
     1,
     "fills the tee run above the displacer; Ø12 passage for the rod"
    ],
    [
     null,
     "tri-clamp-clamps",
     "clamp-half-2in",
     8,
     "four joints, two halves each"
    ],
    [
     null,
     "socket-head-cap-screws-metric",
     "shcs-m5x30",
     8,
     "clamp bolts"
    ],
    [
     null,
     "hex-nuts-metric",
     "nut-m5",
     8,
     "clamp nuts, in the hex traps"
    ],
    [
     null,
     "tri-clamp-displacer",
     "displacer-shell-2in-120",
     1,
     "Ø46 × 120, 0.75 radial gap, 15 stroke"
    ],
    [
     null,
     "tri-clamp-displacer",
     "displacer-cap-2in",
     1,
     "closes the shell, holds the rod"
    ],
    [
     null,
     "displacer-rods",
     "rod-3x200",
     1,
     "displacer rod"
    ],
    [
     null,
     "tri-clamp-diaphragm-head",
     "diaphragm-head-2in",
     1,
     "on the tee branch: the power diaphragm"
    ],
    [
     null,
     "tri-clamp-diaphragm-membrane",
     "membrane-2in",
     1,
     "clamped in place of the gasket"
    ],
    [
     null,
     "tri-clamp-diaphragm-disc",
     "diaphragm-disc-2in",
     1,
     "head side of the membrane, carries the rod"
    ],
    [
     null,
     "tri-clamp-diaphragm-disc",
     "diaphragm-backing-2in",
     1,
     "gas side of the membrane"
    ],
    [
     null,
     "socket-head-cap-screws-metric",
     "shcs-m2x8",
     3,
     "through backing disc, membrane and centre disc"
    ],
    [
     null,
     "hex-nuts-metric",
     "nut-m2",
     3,
     "on the centre disc"
    ],
    [
     null,
     "displacer-rods",
     "rod-3x100",
     1,
     "diaphragm rod"
    ],
    [
     null,
     "displacer-rods",
     "rod-3x150",
     1,
     "pushrod, beam to crank"
    ],
    [
     null,
     "rod-clevises",
     "rod-clevis-3mm",
     4,
     "displacer rod, diaphragm rod, both pushrod ends"
    ],
    [
     null,
     "connecting-rods-623",
     "conrod-30",
     1,
     "displacer rod to beam"
    ],
    [
     null,
     "connecting-rods-623",
     "conrod-60",
     1,
     "diaphragm rod to crank pin"
    ],
    [
     null,
     "ball-bearings-metric",
     "bearing-623",
     5,
     "both con-rods' eyes and the beam pivot"
    ],
    [
     null,
     "rocker-beam",
     "rocker-beam-100",
     1,
     "1:1 beam, displacer 15 stroke"
    ],
    [
     null,
     "beam-pivot-post",
     "pivot-post-60",
     1,
     "on the frame bracket"
    ],
    [
     null,
     "dowel-pins-metric",
     "dowel-3x12",
     1,
     "beam end A with the con-rod beside it"
    ],
    [
     null,
     "dowel-pins-metric",
     "dowel-3x16",
     1,
     "beam pivot through the post and the beam's 623"
    ],
    [
     null,
     "dowel-pins-metric",
     "dowel-3x20",
     2,
     "beam end B with the upper pushrod clevis; diaphragm clevis with its con-rod beside it"
    ],
    [
     null,
     "dowel-pins-metric",
     "dowel-3x30",
     2,
     "crank pin (lower pushrod clevis and diaphragm con-rod); displacer clevis pin (con-rod 12 mm beside the clevis)"
    ],
    [
     null,
     "counterweighted-crank-discs",
     "cw-crank-disc-stroke15",
     1,
     "one pin: diaphragm con-rod and pushrod, 90° lines of action"
    ],
    [
     null,
     "stirling-crankshafts",
     "crankshaft-5x100-dflat",
     1,
     ""
    ],
    [
     null,
     "crank-stands-625",
     "crank-stand-625-h60",
     2,
     "on the frame shelf"
    ],
    [
     null,
     "ball-bearings-metric",
     "bearing-625",
     2,
     "one per stand"
    ],
    [
     null,
     "shaft-collars",
     "collar-5mm",
     1,
     "outside the far stand"
    ],
    [
     null,
     "nut-pocket-flywheels",
     "flywheel-150-m10-b5",
     1,
     "between the crank disc and the stands"
    ],
    [
     null,
     "hex-nut-weights",
     "nut-m10",
     18,
     "one in each rim pocket"
    ],
    [
     null,
     "set-screws-metric",
     "set-m3x4",
     9,
     "grubs: displacer cap, diaphragm disc, 4 clevises, crank disc, collar, flywheel"
    ],
    [
     null,
     "socket-head-cap-screws-metric",
     "shcs-m3x16",
     6,
     "crank stands (4) and pivot post (2) to the frame"
    ],
    [
     null,
     "hex-nuts-metric",
     "nut-m3",
     6,
     "under the shelf and bracket"
    ]
   ]
  }
 },
 "sheet_text": "Build list: Tri-clamp tee diaphragm gamma, 2 in — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/list-tri-clamp-tee-diaphragm-gamma/  (CC BY 4.0)\nBasis: Every part is a free STEP/STL on this site or a standard part with its own page; quantities are the full count, every screw, nut, pin, gasket and clamp.\nCatalog version: 2026-10-20\n\nSizes: see table below\n- A tea-light gamma in 2 in tri-clamp: displacer in a 3 in spool, a short-outlet tee with a diaphragm head as the power piston, a rocker beam and one crank pin at 90°.\n- Numbers: Ø46 × 120 displacer at 15 mm stroke · 2 in diaphragm at 15 mm: 14.2 mL swept · dead volume 118 mL with the filler (289 without) · swept / dead 0.120\n\nsubsystem  object  parts  qty  note\nNone  tri-clamp-diaphragm-gamma-frame  gamma-frame-2in  1  base, column ring, tower, crank shelf, pivot bracket\nNone  tea-light-candles  tea-light-38x16  1  inside the column ring, 17.5 below the hot cap\nNone  tri-clamp-end-cap  tc-cap-2in-flat  1  hot end, face up on the column ring\nNone  tri-clamp-hot-gasket  hot-gasket-2in  1  hot joint\nNone  tri-clamp-heat-shield  heat-shield-2in  1  on the spool above the hot clamp\nNone  tri-clamp-spool  tc-spool-2in-3in  1  displacer cylinder, Ø47.5 bore\nNone  tri-clamp-gasket  tc-gasket-2in  2  spool–tee and tee–head joints\nNone  sanitary-clamp-tees  tee-short-2in  1  short-outlet tee, run vertical, branch to the diaphragm\nNone  tri-clamp-displacer-head  head-displacer-2in  1  top: Ø3 rod guide; its barb is plugged\nNone  silicone-tube  silicone-tube-4x6-50  1  on the head barb, closed by the dowel\nNone  dowel-pins-metric  dowel-4x12  1  plug in the silicone tube\nNone  tri-clamp-volume-filler  plug-tee-2in-rod-106.55  1  fills the tee run above the displacer; Ø12 passage for the rod\nNone  tri-clamp-clamps  clamp-half-2in  8  four joints, two halves each\nNone  socket-head-cap-screws-metric  shcs-m5x30  8  clamp bolts\nNone  hex-nuts-metric  nut-m5  8  clamp nuts, in the hex traps\nNone  tri-clamp-displacer  displacer-shell-2in-120  1  Ø46 × 120, 0.75 radial gap, 15 stroke\nNone  tri-clamp-displacer  displacer-cap-2in  1  closes the shell, holds the rod\nNone  displacer-rods  rod-3x200  1  displacer rod\nNone  tri-clamp-diaphragm-head  diaphragm-head-2in  1  on the tee branch: the power diaphragm\nNone  tri-clamp-diaphragm-membrane  membrane-2in  1  clamped in place of the gasket\nNone  tri-clamp-diaphragm-disc  diaphragm-disc-2in  1  head side of the membrane, carries the rod\nNone  tri-clamp-diaphragm-disc  diaphragm-backing-2in  1  gas side of the membrane\nNone  socket-head-cap-screws-metric  shcs-m2x8  3  through backing disc, membrane and centre disc\nNone  hex-nuts-metric  nut-m2  3  on the centre disc\nNone  displacer-rods  rod-3x100  1  diaphragm rod\nNone  displacer-rods  rod-3x150  1  pushrod, beam to crank\nNone  rod-clevises  rod-clevis-3mm  4  displacer rod, diaphragm rod, both pushrod ends\nNone  connecting-rods-623  conrod-30  1  displacer rod to beam\nNone  connecting-rods-623  conrod-60  1  diaphragm rod to crank pin\nNone  ball-bearings-metric  bearing-623  5  both con-rods' eyes and the beam pivot\nNone  rocker-beam  rocker-beam-100  1  1:1 beam, displacer 15 stroke\nNone  beam-pivot-post  pivot-post-60  1  on the frame bracket\nNone  dowel-pins-metric  dowel-3x12  1  beam end A with the con-rod beside it\nNone  dowel-pins-metric  dowel-3x16  1  beam pivot through the post and the beam's 623\nNone  dowel-pins-metric  dowel-3x20  2  beam end B with the upper pushrod clevis; diaphragm clevis with its con-rod beside it\nNone  dowel-pins-metric  dowel-3x30  2  crank pin (lower pushrod clevis and diaphragm con-rod); displacer clevis pin (con-rod 12 mm beside the clevis)\nNone  counterweighted-crank-discs  cw-crank-disc-stroke15  1  one pin: diaphragm con-rod and pushrod, 90° lines of action\nNone  stirling-crankshafts  crankshaft-5x100-dflat  1  \nNone  crank-stands-625  crank-stand-625-h60  2  on the frame shelf\nNone  ball-bearings-metric  bearing-625  2  one per stand\nNone  shaft-collars  collar-5mm  1  outside the far stand\nNone  nut-pocket-flywheels  flywheel-150-m10-b5  1  between the crank disc and the stands\nNone  hex-nut-weights  nut-m10  18  one in each rim pocket\nNone  set-screws-metric  set-m3x4  9  grubs: displacer cap, diaphragm disc, 4 clevises, crank disc, collar, flywheel\nNone  socket-head-cap-screws-metric  shcs-m3x16  6  crank stands (4) and pivot post (2) to the frame\nNone  hex-nuts-metric  nut-m3  6  under the shelf and bracket\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\nXem Studio scan: not planned; the official CAD above covers it.\nAPI: https://xemstudio.com/api/geometry?object=list-tri-clamp-tee-diaphragm-gamma\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": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "tri-clamp-diaphragm-head",
  "tri-clamp-diaphragm-membrane",
  "tri-clamp-diaphragm-disc",
  "tri-clamp-volume-filler",
  "tri-clamp-diaphragm-gamma-frame",
  "sanitary-clamp-tees",
  "tri-clamp-displacer",
  "rocker-beam",
  "list-gamma-2in-tri-clamp"
 ],
 "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": [],
 "faq": [
  {
   "q": "What parts do I need for the tri-clamp tee diaphragm gamma?",
   "a": "46 parts, every one a free STEP/STL on this site; see the table and the build order on this page."
  },
  {
   "q": "Why a diaphragm instead of a piston?",
   "a": "A clamped membrane has no sliding seal: no piston fit, no friction at the seal, and it seals as well as a gasket."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/list-tri-clamp-tee-diaphragm-gamma/index.md"
}