{
 "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-ltd-mug",
 "name": "Build list: Mug LTD (sits on a coffee mug)",
 "kind": "list",
 "category": "Stirling engines",
 "group": "Guide",
 "year": null,
 "question": "What parts do I need to build a Stirling engine that sits on a coffee mug?",
 "tags": [
  "list",
  "build",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "mug stirling engine",
  "coffee mug stirling engine parts list",
  "ltd stirling engine glass syringe"
 ],
 "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-ltd-mug/",
 "sheet_txt": "https://xemstudio.com/objects/list-ltd-mug/sheet.txt",
 "sheet": {
  "basis": "Every part is a free file on this site.",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "",
   "Numbers: Ø76 × 23 chamber · Ø72 × 6 displacer at 15 mm · 5 mL glass syringe (Ø12.60) at 15 mm · volume ratio 33 · Ø100 nut flywheel crank · both cranks overhung"
  ],
  "table": {
   "columns": [
    "subsystem",
    "object",
    "parts",
    "qty",
    "note"
   ],
   "rows": [
    [
     "Hot plate",
     "mug-ltd-bottom-plate",
     "mug-ltd-bottom-plate-90",
     1,
     "rests on the mug rim"
    ],
    [
     "Chamber",
     "mug-ltd-chamber-ring",
     "mug-ltd-chamber-ring-76-h23",
     1,
     "Ø76 × 23"
    ],
    [
     "Cold plate",
     "mug-ltd-top-plate",
     "mug-ltd-top-plate-90-glass5",
     1,
     ""
    ],
    [
     "Displacer",
     "mug-ltd-displacer",
     "mug-ltd-displacer-72x6",
     1,
     "2 radial gap"
    ],
    [
     "Displacer rod",
     "displacer-rods",
     "rod-2x100",
     1,
     "through the displacer and the Ø2 guide"
    ],
    [
     "Rod clevis",
     "mug-ltd-rod-clevis",
     "rod-clevis-2mm-p51",
     1,
     "on the rod top"
    ],
    [
     "Power cylinder",
     "glass-syringes",
     "glass-syringe-5ml-barrel",
     1,
     "in the top-plate socket, tip down"
    ],
    [
     "Power piston",
     "glass-syringes",
     "glass-syringe-5ml-plunger",
     1,
     ""
    ],
    [
     "Plunger clevis",
     "glass-syringe-plunger-clevis",
     "plunger-clevis-glass-5ml",
     1,
     "over the plunger collar"
    ],
    [
     "Chamber screws",
     "socket-head-cap-screws-metric",
     "shcs-m3x30",
     5,
     "top plate and ring into the tapped bottom plate"
    ],
    [
     "Pedestal screws",
     "socket-head-cap-screws-metric",
     "shcs-m3x8",
     2,
     "foot and top plate into the ring's tapped holes"
    ],
    [
     "Crank pedestal",
     "mug-ltd-crank-pedestal",
     "mug-ltd-crank-pedestal",
     1,
     "one piece"
    ],
    [
     "Bearings",
     "ball-bearings-metric",
     "bearing-623",
     2,
     "one in each face of the block"
    ],
    [
     "Shaft",
     "dowel-pins-metric",
     "dowel-3x30",
     1,
     "Ø3 × 30: flywheel hub to crank disc"
    ],
    [
     "Flywheel crank",
     "flywheel-crank",
     "flywheel-crank-100-m8-b3-s15",
     1,
     "displacer crank, 7.5 throw"
    ],
    [
     "Flywheel weights",
     "hex-nut-weights",
     "nut-m8",
     6,
     "alternate pockets"
    ],
    [
     "Crank disc",
     "crank-discs-3mm-bore",
     "crank-disc-b3-stroke15",
     1,
     "power crank, 90° behind the flywheel pin"
    ],
    [
     "Con-rods",
     "pin-end-con-rods",
     "conrod-45",
     2,
     "displacer and power"
    ],
    [
     "Crank pin (flywheel)",
     "dowel-pins-metric",
     "dowel-3x16",
     1,
     "10 in the hub, through the con-rod, 1 proud"
    ],
    [
     "Pins",
     "dowel-pins-metric",
     "dowel-3x12",
     3,
     "power crank pin, two clevis pins"
    ],
    [
     "Grub screw",
     "set-screws-metric",
     "set-m3x10",
     1,
     "crank disc"
    ],
    [
     "Grub screw",
     "set-screws-metric",
     "set-m3x8",
     1,
     "flywheel hub"
    ],
    [
     "Grub screw",
     "set-screws-metric",
     "set-m3x3",
     1,
     "plunger clevis"
    ]
   ]
  }
 },
 "sheet_text": "Build list: Mug LTD (sits on a coffee mug) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/list-ltd-mug/  (CC BY 4.0)\nBasis: Every part is a free file on this site.\nCatalog version: 2026-10-20\n\nSizes: see table below\n- \n- Numbers: Ø76 × 23 chamber · Ø72 × 6 displacer at 15 mm · 5 mL glass syringe (Ø12.60) at 15 mm · volume ratio 33 · Ø100 nut flywheel crank · both cranks overhung\n\nsubsystem  object  parts  qty  note\nHot plate  mug-ltd-bottom-plate  mug-ltd-bottom-plate-90  1  rests on the mug rim\nChamber  mug-ltd-chamber-ring  mug-ltd-chamber-ring-76-h23  1  Ø76 × 23\nCold plate  mug-ltd-top-plate  mug-ltd-top-plate-90-glass5  1  \nDisplacer  mug-ltd-displacer  mug-ltd-displacer-72x6  1  2 radial gap\nDisplacer rod  displacer-rods  rod-2x100  1  through the displacer and the Ø2 guide\nRod clevis  mug-ltd-rod-clevis  rod-clevis-2mm-p51  1  on the rod top\nPower cylinder  glass-syringes  glass-syringe-5ml-barrel  1  in the top-plate socket, tip down\nPower piston  glass-syringes  glass-syringe-5ml-plunger  1  \nPlunger clevis  glass-syringe-plunger-clevis  plunger-clevis-glass-5ml  1  over the plunger collar\nChamber screws  socket-head-cap-screws-metric  shcs-m3x30  5  top plate and ring into the tapped bottom plate\nPedestal screws  socket-head-cap-screws-metric  shcs-m3x8  2  foot and top plate into the ring's tapped holes\nCrank pedestal  mug-ltd-crank-pedestal  mug-ltd-crank-pedestal  1  one piece\nBearings  ball-bearings-metric  bearing-623  2  one in each face of the block\nShaft  dowel-pins-metric  dowel-3x30  1  Ø3 × 30: flywheel hub to crank disc\nFlywheel crank  flywheel-crank  flywheel-crank-100-m8-b3-s15  1  displacer crank, 7.5 throw\nFlywheel weights  hex-nut-weights  nut-m8  6  alternate pockets\nCrank disc  crank-discs-3mm-bore  crank-disc-b3-stroke15  1  power crank, 90° behind the flywheel pin\nCon-rods  pin-end-con-rods  conrod-45  2  displacer and power\nCrank pin (flywheel)  dowel-pins-metric  dowel-3x16  1  10 in the hub, through the con-rod, 1 proud\nPins  dowel-pins-metric  dowel-3x12  3  power crank pin, two clevis pins\nGrub screw  set-screws-metric  set-m3x10  1  crank disc\nGrub screw  set-screws-metric  set-m3x8  1  flywheel hub\nGrub screw  set-screws-metric  set-m3x3  1  plunger clevis\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-ltd-mug\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": [
  "mug-ltd-top-plate",
  "glass-syringes",
  "glass-syringe-plunger-clevis",
  "list-ltd-coffee-cup"
 ],
 "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 to build a Stirling engine that sits on a coffee mug?",
   "a": "23 parts, every one a free STEP/STL on this site; see the table and the build order on this page."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/list-ltd-mug/index.md"
}