{
 "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": "cardan-spider-14",
 "name": "Cardan joint cross (spider) 14 × 14, 7 mm arms, Ø3 pin holes",
 "kind": "modern",
 "category": "Hardware",
 "group": "Mechanism parts",
 "year": null,
 "question": "What is the cross of a universal joint?",
 "tags": [
  "mechanism part",
  "507 mechanical movements"
 ],
 "aliases": [
  "universal joint spider",
  "u joint cross",
  "cardan cross",
  "cruceta de cardán",
  "Kardankreuz"
 ],
 "overall_mm": {
  "length": 14,
  "width": 14,
  "height": 7
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/cardan-spider-14/",
 "sheet_txt": "https://xemstudio.com/objects/cardan-spider-14/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design following Brown's figure (1868); true size, no printing allowance",
  "overall_mm": {
   "length": 14,
   "width": 14,
   "height": 7
  },
  "notes": [
   "Cross of two 7 × 7 mm arms, 14 mm across (the fork gap): a Ø3 hole straight through one arm for the long pin (dowel 3 × 20) and two Ø3 holes in the other arm from its ends to 2 mm from the centre for two short pins (dowel 3 × 10); the four pin ends are the trunnions the yokes turn on.",
   "Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "arms",
     "7 × 7 mm, 14 across"
    ],
    [
     "through hole",
     "Ø3 along X"
    ],
    [
     "blind holes",
     "2 × Ø3, 5 deep, along Y"
    ]
   ]
  }
 },
 "sheet_text": "Cardan joint cross (spider) 14 × 14, 7 mm arms, Ø3 pin holes — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/cardan-spider-14/  (CC BY 4.0)\nBasis: Xem Studio design following Brown's figure (1868); true size, no printing allowance\nCatalog version: 2026-10-20\n\nOverall (mm): length 14.0, width 14.0, height 7.0\n- Cross of two 7 × 7 mm arms, 14 mm across (the fork gap): a Ø3 hole straight through one arm for the long pin (dowel 3 × 20) and two Ø3 holes in the other arm from its ends to 2 mm from the centre for two short pins (dowel 3 × 10); the four pin ends are the trunnions the yokes turn on.\n- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).\n\ndimension  value\narms  7 × 7 mm, 14 across\nthrough hole  Ø3 along X\nblind holes  2 × Ø3, 5 deep, along Y\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Henry T. Brown (1868, public domain): Five Hundred and Seven Mechanical Movements — scan on archive.org — web — Publisher's page; dimensions are facts — https://archive.org/details/fivehundredseven00browiala\n- 507movements.com: Brown's movement No. 50: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_050.html\n- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/universal-joint-mechanism/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/cardan-spider-14/index.json\nAPI: https://xemstudio.com/api/geometry?object=cardan-spider-14\n",
 "sources": [
  {
   "publisher": "Henry T. Brown (1868, public domain)",
   "title": "Five Hundred and Seven Mechanical Movements — scan on archive.org",
   "url": "https://archive.org/details/fivehundredseven00browiala",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "507movements.com",
   "title": "Brown's movement No. 50: figure, his text and an animation",
   "url": "https://507movements.com/mm_050.html",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Xem Studio",
   "title": "drawing",
   "url": "https://xemstudio.com/objects/universal-joint-mechanism/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "universal-joint-mechanism"
 ],
 "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 is the cross of a universal joint?",
   "a": "Cross of two 7 × 7 mm arms, 14 mm across (the fork gap): a Ø3 hole straight through one arm for the long pin (dowel 3 × 20) and two Ø3 holes in the other arm from its ends to 2 mm from the centre for two short pins (dowel 3 × 10); the four pin ends are the trunnions the yokes turn on."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "cardan-spider-14",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/cardan-spider-14/cardan-spider-14.step",
   "stl": "https://xemstudio.com/files/hardware/cardan-spider-14/cardan-spider-14.stl",
   "note": "spider, centred on the origin"
  }
 ],
 "markdown": "https://xemstudio.com/objects/cardan-spider-14/index.md"
}