{
 "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": "parallel-ruler-blade-200",
 "name": "Parallel ruler blade 200 × 20 × 5, pivot hole and 3 mm slot",
 "kind": "modern",
 "category": "Hardware",
 "group": "Mechanism parts",
 "year": null,
 "question": "What is a parallel ruler blade?",
 "tags": [
  "mechanism part",
  "507 mechanical movements"
 ],
 "aliases": [
  "parallel ruler",
  "rolling ruler blade",
  "regla paralela",
  "Parallellineal"
 ],
 "overall_mm": {
  "length": 200,
  "width": 20,
  "height": 5
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/parallel-ruler-blade-200/",
 "sheet_txt": "https://xemstudio.com/objects/parallel-ruler-blade-200/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design following Brown's figure (1868); true size, no printing allowance",
  "overall_mm": {
   "length": 200,
   "width": 20,
   "height": 5
  },
  "notes": [
   "200 × 20 × 5 straight-edge with a Ø3 pivot hole 40 mm left of centre and a 3 mm slot from 12 to 40 mm right of centre: two blades and two crossed 80 mm links make a parallel ruler that opens 0–55 mm.",
   "Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "blade",
     "200 × 20 × 5 mm"
    ],
    [
     "pivot hole",
     "Ø3 at x = −40"
    ],
    [
     "slot",
     "3 mm wide, centres x = 12 … 40"
    ]
   ]
  }
 },
 "sheet_text": "Parallel ruler blade 200 × 20 × 5, pivot hole and 3 mm slot — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/parallel-ruler-blade-200/  (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 200.0, width 20.0, height 5.0\n- 200 × 20 × 5 straight-edge with a Ø3 pivot hole 40 mm left of centre and a 3 mm slot from 12 to 40 mm right of centre: two blades and two crossed 80 mm links make a parallel ruler that opens 0–55 mm.\n- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).\n\ndimension  value\nblade  200 × 20 × 5 mm\npivot hole  Ø3 at x = −40\nslot  3 mm wide, centres x = 12 … 40\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. 324: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_324.html\n- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/parallel-ruler-crossed-arms-mechanism/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/parallel-ruler-blade-200/index.json\nAPI: https://xemstudio.com/api/geometry?object=parallel-ruler-blade-200\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. 324: figure, his text and an animation",
   "url": "https://507movements.com/mm_324.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/parallel-ruler-crossed-arms-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": [
  "parallel-ruler-crossed-arms-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 parallel ruler blade?",
   "a": "200 × 20 × 5 straight-edge with a Ø3 pivot hole 40 mm left of centre and a 3 mm slot from 12 to 40 mm right of centre: two blades and two crossed 80 mm links make a parallel ruler that opens 0–55 mm."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "parallel-ruler-blade-200",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/parallel-ruler-blade-200/parallel-ruler-blade-200.step",
   "stl": "https://xemstudio.com/files/hardware/parallel-ruler-blade-200/parallel-ruler-blade-200.stl",
   "note": "blade, z 0..5"
  }
 ],
 "markdown": "https://xemstudio.com/objects/parallel-ruler-blade-200/index.md"
}