{
 "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": "can-engine-crank-stand",
 "name": "Crank stand for a 623 bearing, 40 / 60 / 80 mm",
 "kind": "standard",
 "category": "Stirling engines",
 "group": "Can & LTD engines",
 "year": null,
 "question": "What are the dimensions of a crank stand for a can Stirling engine?",
 "tags": [
  "crank stand",
  "623",
  "bearing block",
  "can engine",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "623 bearing stand stl",
  "crank stand can engine",
  "3 mm shaft bearing stand",
  "stirling crank support"
 ],
 "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/can-engine-crank-stand/",
 "sheet_txt": "https://xemstudio.com/objects/can-engine-crank-stand/sheet.txt",
 "sheet": {
  "basis": "623 bearing (3 × 10 × 4) pocket at the bearing OD; M3 clearance Ø3.4 (ISO 273) feet",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "An upright 40 wide × 8 thick on a 40 × 24 × 3 foot, in three heights: 40, 60 and 80 mm.",
   "A Ø10 pocket through the 8 mm upright, centred 8 mm below the top, holds a 623 bearing (fit: press) for the Ø3 crankshaft: shaft height 32, 52 or 72 mm.",
   "Two Ø3.4 foot holes at (−15, 8) and (15, −8) take M3 screws to the base. A crank uses two stands, one each side."
  ],
  "table": {
   "columns": [
    "file",
    "height",
    "shaft axis height",
    "bearing pocket",
    "foot"
   ],
   "rows": [
    [
     "crank-stand-40",
     40,
     32,
     "Ø10 × 8",
     "40 × 24 × 3"
    ],
    [
     "crank-stand-60",
     60,
     52,
     "Ø10 × 8",
     "40 × 24 × 3"
    ],
    [
     "crank-stand-80",
     80,
     72,
     "Ø10 × 8",
     "40 × 24 × 3"
    ]
   ]
  }
 },
 "sheet_text": "Crank stand for a 623 bearing, 40 / 60 / 80 mm — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/can-engine-crank-stand/  (CC BY 4.0)\nBasis: 623 bearing (3 × 10 × 4) pocket at the bearing OD; M3 clearance Ø3.4 (ISO 273) feet\nCatalog version: 2026-10-20\n\nSizes: see table below\n- An upright 40 wide × 8 thick on a 40 × 24 × 3 foot, in three heights: 40, 60 and 80 mm.\n- A Ø10 pocket through the 8 mm upright, centred 8 mm below the top, holds a 623 bearing (fit: press) for the Ø3 crankshaft: shaft height 32, 52 or 72 mm.\n- Two Ø3.4 foot holes at (−15, 8) and (15, −8) take M3 screws to the base. A crank uses two stands, one each side.\n\nfile  height  shaft axis height  bearing pocket  foot\ncrank-stand-40  40  32  Ø10 × 8  40 × 24 × 3\ncrank-stand-60  60  52  Ø10 × 8  40 × 24 × 3\ncrank-stand-80  80  72  Ø10 × 8  40 × 24 × 3\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: Stirling engine — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Stirling_engine\n- Long Earth Society: Can engine build — video, web — LES site — https://longearthsociety.com/engineering/\n- Long Earth Society: Engine builds (videos and write-ups) — web, video — LES site — https://longearthsociety.com/engineering/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/can-engine-crank-stand/index.json\nAPI: https://xemstudio.com/api/geometry?object=can-engine-crank-stand\n",
 "sources": [
  {
   "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
  },
  {
   "publisher": "Long Earth Society",
   "title": "Can engine build",
   "url": "https://longearthsociety.com/engineering/",
   "formats": [
    "video",
    "web"
   ],
   "license": "LES site",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Long Earth Society",
   "title": "Engine builds (videos and write-ups)",
   "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": [
  "ball-bearings-metric",
  "stirling-crankshafts",
  "flywheel-disc-hub",
  "ltd-crank-stand",
  "list-can-engine"
 ],
 "fits": [
  {
   "role": "Goes in or on",
   "items": [
    {
     "slug": "ball-bearings-metric",
     "why": "623 pressed in the Ø10 pocket"
    }
   ]
  },
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "stirling-crankshafts",
     "why": "Ø3 crankshaft through the 623s"
    },
    {
     "slug": "craft-sticks",
     "why": "Ø3 skewer as the crankshaft"
    },
    {
     "slug": "flywheel-disc-hub",
     "why": "Ø3-bore hub on the same shaft"
    }
   ]
  },
  {
   "role": "Alternatives",
   "items": [
    {
     "slug": "ltd-crank-stand",
     "why": "45 mm stand for the LTD engine"
    }
   ]
  }
 ],
 "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": "stand bearing pockets",
   "exact": "Ø10",
   "mates": "623 bearing",
   "fit": "press",
   "files": "crank-stand-"
  },
  {
   "feature": "stand foot holes",
   "exact": "Ø3.4",
   "mates": "M3 screw clearance",
   "fit": "designed",
   "files": "crank-stand-"
  }
 ],
 "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": "What bearing does the crank stand take?",
   "a": "A 623 (3 × 10 × 4) in the Ø10 pocket, for a Ø3 crankshaft or skewer."
  },
  {
   "q": "How high is the crankshaft on each stand?",
   "a": "8 mm below the top: 32, 52 or 72 mm above the foot for the 40, 60 and 80 mm stands."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "crank-stand-40",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-40.step",
   "stl": "https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-40.stl",
   "note": "crank stand 40 mm, Ø10 pocket for a 623 bearing (Ø3 shaft), 2 × M3 clearance (Ø3.4) foot holes"
  },
  {
   "file": "crank-stand-60",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-60.step",
   "stl": "https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-60.stl",
   "note": "crank stand 60 mm, Ø10 pocket for a 623 bearing (Ø3 shaft), 2 × M3 clearance (Ø3.4) foot holes"
  },
  {
   "file": "crank-stand-80",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-80.step",
   "stl": "https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-80.stl",
   "note": "crank stand 80 mm, Ø10 pocket for a 623 bearing (Ø3 shaft), 2 × M3 clearance (Ø3.4) foot holes"
  }
 ],
 "markdown": "https://xemstudio.com/objects/can-engine-crank-stand/index.md"
}