{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "scotch-yoke-rod-guide-8x8",
 "name": "Rod guide 20 × 20 × 18 with an 8 × 8 slot",
 "kind": "modern",
 "category": "Hardware",
 "group": "Mechanism parts",
 "year": null,
 "question": "What guides the yoke's rod?",
 "tags": [
  "mechanism part",
  "507 mechanical movements"
 ],
 "aliases": [
  "rod guide",
  "guía de vástago",
  "Stangenführung"
 ],
 "overall_mm": {
  "length": 20,
  "width": 20,
  "height": 18
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/scotch-yoke-rod-guide-8x8/",
 "sheet_txt": "https://xemstudio.com/objects/scotch-yoke-rod-guide-8x8/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design following Brown's figure (1868); true size, no printing allowance",
  "overall_mm": {
   "length": 20,
   "width": 20,
   "height": 18
  },
  "notes": [
   "Block with an 8 × 8 slot through it, aligned with the yoke's rod: keeps the yoke moving on a straight line.",
   "Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "block",
     "20 × 20 × 18"
    ],
    [
     "slot",
     "8 × 8"
    ]
   ]
  }
 },
 "sheet_text": "Rod guide 20 × 20 × 18 with an 8 × 8 slot — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/scotch-yoke-rod-guide-8x8/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)\nBasis: Xem Studio design following Brown's figure (1868); true size, no printing allowance\nCatalog version: 2026-10-20\n\nOverall (mm): length 20.0, width 20.0, height 18.0\n- Block with an 8 × 8 slot through it, aligned with the yoke's rod: keeps the yoke moving on a straight line.\n- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).\n\ndimension  value\nblock  20 × 20 × 18\nslot  8 × 8\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. 93: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_093.html\n- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/scotch-yoke-crank-mechanism/\n\nFree files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/scotch-yoke-rod-guide-8x8/index.json\nAPI: https://xemstudio.com/api/geometry?object=scotch-yoke-rod-guide-8x8\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. 93: figure, his text and an animation",
   "url": "https://507movements.com/mm_093.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/scotch-yoke-crank-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": [
  "scotch-yoke-crank-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 guides the yoke's rod?",
   "a": "Block with an 8 × 8 slot through it, aligned with the yoke's rod: keeps the yoke moving on a straight line."
  }
 ],
 "files_license": {
  "name": "Xem Studio Design License",
  "holder": "Xem Studio",
  "url": "https://xemstudio.com/license/",
  "note": "Xem Studio's own design: free to use, print, modify and sell things made from it; not to be republished or redistributed as files."
 },
 "offers": [
  {
   "file": "scotch-yoke-rod-guide-8x8",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/scotch-yoke-rod-guide-8x8/scotch-yoke-rod-guide-8x8.step",
   "stl": "https://xemstudio.com/files/hardware/scotch-yoke-rod-guide-8x8/scotch-yoke-rod-guide-8x8.stl",
   "note": "as drawn in the mechanism's own frame"
  }
 ],
 "markdown": "https://xemstudio.com/objects/scotch-yoke-rod-guide-8x8/index.md"
}