{
 "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": "uniform-motion-yoke-plate-60x40-r12",
 "name": "Uniform-motion yoke plate 60 × 40 × 8 with closed channel for a 12 mm crank",
 "kind": "modern",
 "category": "Hardware",
 "group": "Mechanism parts",
 "year": null,
 "question": "What is a uniform-motion crank channel?",
 "tags": [
  "mechanism part",
  "507 mechanical movements"
 ],
 "aliases": [
  "constant velocity cam slot",
  "uniform motion yoke",
  "yugo de movimiento uniforme",
  "Gleichlaufkulisse"
 ],
 "overall_mm": {
  "length": 60,
  "width": 40,
  "height": 8
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/uniform-motion-yoke-plate-60x40-r12/",
 "sheet_txt": "https://xemstudio.com/objects/uniform-motion-yoke-plate-60x40-r12/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design following Brown's figure (1868); true size, no printing allowance",
  "overall_mm": {
   "length": 60,
   "width": 40,
   "height": 8
  },
  "notes": [
   "60 × 40 × 8 plate with a closed 3 mm channel through it whose centre line is the crank-pin path drawn in the plate's own frame when the plate moves at constant speed: x = r cos θ − X(θ), y = r sin θ with X(θ) linear in θ (24 mm out over half a turn, back over the other half). Two Ø5 bores along X (y = ±17) for the guide pillars.",
   "The channel is a rounded diamond, 51 × 27 mm over its walls; the pin changes direction at the two pointed ends.",
   "Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "plate",
     "60 × 40 × 8 mm"
    ],
    [
     "channel",
     "3 mm wide, closed loop 51 × 27"
    ],
    [
     "crank radius",
     "12 mm"
    ],
    [
     "guide bores",
     "2 × Ø5 at y = ±17"
    ]
   ]
  }
 },
 "sheet_text": "Uniform-motion yoke plate 60 × 40 × 8 with closed channel for a 12 mm crank — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/uniform-motion-yoke-plate-60x40-r12/  (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 60.0, width 40.0, height 8.0\n- 60 × 40 × 8 plate with a closed 3 mm channel through it whose centre line is the crank-pin path drawn in the plate's own frame when the plate moves at constant speed: x = r cos θ − X(θ), y = r sin θ with X(θ) linear in θ (24 mm out over half a turn, back over the other half). Two Ø5 bores along X (y = ±17) for the guide pillars.\n- The channel is a rounded diamond, 51 × 27 mm over its walls; the pin changes direction at the two pointed ends.\n- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).\n\ndimension  value\nplate  60 × 40 × 8 mm\nchannel  3 mm wide, closed loop 51 × 27\ncrank radius  12 mm\nguide bores  2 × Ø5 at y = ±17\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. 354: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_354.html\n- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/uniform-motion-crank-yoke-mechanism/\n\nFree files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/uniform-motion-yoke-plate-60x40-r12/index.json\nAPI: https://xemstudio.com/api/geometry?object=uniform-motion-yoke-plate-60x40-r12\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. 354: figure, his text and an animation",
   "url": "https://507movements.com/mm_354.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/uniform-motion-crank-yoke-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": [
  "uniform-motion-crank-yoke-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 a uniform-motion crank channel?",
   "a": "60 × 40 × 8 plate with a closed 3 mm channel through it whose centre line is the crank-pin path drawn in the plate's own frame when the plate moves at constant speed: x = r cos θ − X(θ), y = r sin θ with X(θ) linear in θ (24 mm out over half a turn, back over the other half). Two Ø5 bores along X (y = ±17) for the guide pillars."
  }
 ],
 "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": "uniform-motion-yoke-plate-60x40-r12",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/uniform-motion-yoke-plate-60x40-r12/uniform-motion-yoke-plate-60x40-r12.step",
   "stl": "https://xemstudio.com/files/hardware/uniform-motion-yoke-plate-60x40-r12/uniform-motion-yoke-plate-60x40-r12.stl",
   "note": "plate, z 0..8, bores along X"
  }
 ],
 "markdown": "https://xemstudio.com/objects/uniform-motion-yoke-plate-60x40-r12/index.md"
}